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SPACE GASS

Structural Engineering Software

 

Development History

Track program changes and bug fixes

It is important to keep your software up to date so that you get the latest updates, enhancements and bug fixes. The key changes made to SPACE GASS in recent years are described below. Note that minor enhancements and bug fixes are not listed.

Version 12.60

This is a major new version that contains many new features, including the following significant ones:

    Build 12.60.913:
  • A critical bug in the portal frame builder that caused incorrect loads to be generated has been fixed. It was caused by a change made to the ka factor that resulted in it being incorrectly applied. Some of the loads being generated were conservative and others were non-conservative. This bug only affects SPACE GASS 12.60 in versions earlier than v12.60.896.
  • In the AS3600 RC column design module, the check for minimum shear steel was being skipped if the shear exceeded 0.5Vuc. This affects versions 12.24.285 to 12.60.884.
  • In the AS4100 steel connection design module, the end plate for tubular bolted splice and apex connections was, under some circumstances, labelled with the incorrect size in the graphical notation and report summary. This has now been rectified. It was correct in the dimensions shown graphically and in the main report.
  • Torsion stresses for square and rectangular tubular sections were reported with conservative (too high) values in text reports and in the traditional SPACE GASS graphical interface. The renderer graphics was not affected.
  • Includes some other minor improvements and fixes.

  • Build 12.60.863:
  • Plate strips have been added. These allow you to draw lines across any surface that has been modelled with plate elements and then obtain diagrams of deflections, bending moments, shear forces, axial forces and stresses along the strip. These are useful for modelling things like column and middle strips on a slab.
  • Moment adjustments using the Wood-Armer method are now available for the plate strip bending moment diagrams.
  • Plate contour diagrams have been upgraded to show coloured contour steps, each of which represents a range of moment, force or stress values. The previous continuous contouring is also still available.
  • Plate displacements can now be shown as contour diagrams.
  • Factors can now be applied to a cross section's area, torsion constant and moments of inertia. These are useful for modelling cracked section properties in reinforced concrete members.
  • A new wind load calculator tool for AS/NZS 1170.2 and IS875 (Part 3) : 2015 has been added. The wind calculator can be selected from the main toolbar and is also accessible via the Area Load generation tool.
  • Detailed charts of analysis result diagrams are now available. You can access them by simply double-clicking on an analysis result diagram.
  • You can now define load case groups (selections) and select them from the load case dropdown box on the top toolbar and from wherever load cases are selected throughout the program.
  • Generation of text reports is now much quicker and will never run out of memory regardless of the size of the job.
  • Copy and Find when viewing text reports now works for the entire report rather than just the current page.
  • Loads shown graphically can now be displayed by load type with multiple load types able to be selected.
  • An STL import tool for importing plate models has been added. This allows you to import complex models that you have created in 3D modelling programs such as Sketchup or 3D Builder. Once imported, the model is fully meshed ready for analysis.
  • The IS875 version of the portal frame builder has been updated to support IS875 : 2015.
  • Now support steel member design to AISC 360-16.
  • Fixed double angles with their vertical "long" legs connected being incorrectly treated as upside-down in the AISC, Hong Kong, Indian, British and Eurocode steel member design modules.
  • Jobs are now saved with a preview image that you can view when scrolling through jobs before opening one.
  • Analysis and design results can be omitted when saving a job.
  • Added a “Save a Copy” option for SPACE GASS jobs.
  • The job compression method can now be specified when doing a “Save As” or “Save a Copy”.
  • Fixed incorrect intermediate member values shown graphically in the renderer when global-projected member distributed forces were applied to inclined members. Vertical or horizontal members were not affected. Inclined members with local or global-inclined member distributed forces were not affected. Text reports and the steel design module were not affected. The reinforced concrete column and beam modules could have been affected if used with inclined beams or inclined columns subjected to global-projected distributed forces.
  • Added a line to reactions reports that shows the sum of the listed reactions. The sum of all reactions in the job is also retained.
  • Allow the torsion constant to be changed manually without deleting a section’s shape information.
  • Fixed combination load cases not finding all their primaries if a sub-combination is referenced more than once, resulting in the affected combination missing the loads that belong to the repeated sub-combinations. For example, if combination 20=1+9+21, combination 21=1+2 and combination 30=20+21 then the two combination 21 references in combination 30 would have caused one of them to be ignored. This could have affected load diagrams, the analysis result diagrams and the reinforced concrete beam and column design modules. The analysis, reports or steel design modules were not affected.
  • The viewpoint can now be set directly by defining a horizontal and vertical angle.
  • The viewpoint, operating plane and projection mode (perspective vs orthographic) can now be selected by right-clicking on the view selector.
  • Added an option for the base to be wider than the walls in the plated box, plated round tank and plated round cone structure wizards.
  • Added options for internal supports and compression-only supports for the plated round tank and plated round cone structure wizards.
  • Added “Print” and “Copy to clipboard” buttons to various display forms such as Job Status, Analysis Results, Design Results, Error Messages, etc.
  • Changed the portal frame builder for AS/NZS1170.2 so that Md for each of the orthogonal building axes is now the maximum of the Md values taken from a 45deg arc on either side of the axis. Previously Md was calculated just for each orthogonal axis without considering a 45deg arc on either side of it.
  • Now show the number of items found in the Find tool.
  • Changed the 0.33 and 0.67 member snap positions to 1/3 and 2/3.
  • Removed the 32765 limit on combination load case multiplying factors, node restraint springs and spectral loads.
  • Mode shapes in reports can now be mass normalized. Mode shapes exported to text files are now always mass normalized.

Version 12.54

    Build 12.54.575:
  • Changed the portal frame builder for AS/NZS1170.2 so that Md for each of the orthogonal building axes is now the maximum of the Md values taken from a 45deg arc on either side of the axis as per AS/NZS1170.2 section 2.3. Previously Md was calculated just for each orthogonal axis without considering a 45deg arc on either side of it.

  • Build 12.54.574:
  • Solved some random problems caused by the Windows 10 Creator update that started being rolled out in April 2017. The Windows 10 Creator update adversely affects the obfuscation used in SPACE GASS 12.5 and so the fix in this release involves simply using a different obfuscation method. The reported effects of this Windows update include spurious errors and unpredictable behaviour in the portal frame builder (an “Invalid ridge position” error message), the shape builder (Tb getting the Tw value for I-shapes or Z shapes being drawn incorrectly) and the steel connection design module (random errors), however other unreported and potentially serious problems may also occur. The same problem has been reported in SPACE GASS 12.5 with some versions of Windows 7 and Windows 8, and we suspect that an update of a particular Windows component is responsible for the changed behaviour. For this reason we recommend that you upgrade your SPACFE GASS 12.5 regardless of which version of Windows you have.
  • Fixed combination load cases not finding all their primaries if a sub-combination is referenced more than once, resulting in the affected combination missing the loads that belong to the repeated sub-combinations. For example, if combination 20=1+9+21, combination 21=1+2 and combination 30=20+21 then the two combination 21 references in combination 30 would have caused one of them to be ignored. This could have affected load diagrams, the analysis result diagrams and the reinforced concrete beam and column design modules. The analysis, reports or steel design modules were not affected.
  • Fixed incorrect intermediate member values shown graphically in the renderer when global-projected member distributed forces were applied to inclined members. Vertical or horizontal members were not affected. Inclined members with local or global-inclined member distributed forces were not affected. Text reports and the steel design module were not affected. The reinforced concrete column and beam modules could have been affected if used with inclined beams or inclined columns subjected to global-projected distributed forces.

  • Build 12.54.568:
  • Changed the calculation of Pcbar in equation 8.80 of the Hong Kong steel member design module so that it is now limited by the compression effective lengths and the member length rather than just being based on the member length. This makes it considerably less conservative when combined actions govern.
  • Now allow for the SAP2000 IFC format of node restraints when importing from IFC.
  • The shear key depth and on/off toggle for baseplates are now being saved with the connection. In previous versions they were discarded when the connection editor was closed.
  • Fixed the calculation of shear strength in reinforced concrete columns (ΦVuc in AS3600 or τc in IS456) so that it is now based on the longitudinal tension reinforcement rather than the compression reinforcement. Previously the shear capacity was underestimated, making the column design/check conservative.
  • Now trap steel design groups that have not all members facing the same way if their cross section is not symmetrical about the minor axis (eg. Channels, CTs, EAs, UAs, etc).
  • Added a check for an out-of-date analysis solver.

  • Build 12.54.554:
  • Updated the calculation of bending effective lengths in the IS800 steel member design module.
  • Now block members with negatively rotated sections from being checked in the steel member design module.
  • Allow more instances of timed-out Titan licences to be recovered without having to restart SPACE GASS.
  • The 32-bit solver is now included with the main SPACE GASS installation. This was a separate installation in versions 12.50 to 12.53 for users with older computers that couldn't run the 64-bit solver.

Version 12.53 (build 12.53.543)

  • When displaying dynamic mode shapes you can now press "M" to go straight to the desired mode rather than having to scroll through lots of modes to get to the one you want.
  • Changed the method of distributing moving loads to a plate’s nodes based on the distance from the load to each plate edge. The load is then distributed to the nodes at the ends of each edge based on where the closest point to the load is along the edge. This is more accurate than the previous method of loading a plate’s nodes based on the direct distance from the load to each node.
  • Added the member's L/r ratio to the info panel that appears when you hover over a member.
  • Corrected a bug that could have caused incorrect plate actions and stresses to be reported for plates that have thermal loads applied in two or more primary load cases which are then combined into a load combination. The analysis itself is correct and the other plates, members and nodes in the model are not affected, however the combinations involved need to be re-analysed with SPACE GASS 12.53 or later in order to reset the reported values for the affected plates. If you wish to get this bug fix without upgrading to v12.53 or later then upgrades for SPACE GASS 10.95 and 11.17 are available from Legacy Installations.
  • Added support for importing Midas IFC files.
  • Made the shape builder mirror and transpose buttons easier to see when they are pressed in.

Version 12.52 (build 12.52.522)

  • Added thermal gradient loads for members.
  • Fixed a labelling error that displayed "Degree" units for plate thermal gradients instead of "Degree/Length" units. The thermal gradient calculations were correct but the units were shown incorrectly.
  • Sped up the analysis by getting rid of unnecessary processing of Windows messages that were happening in a wait loop, and by giving the solver a higher processor priority. This has resulted in speed increases of up to 2x on typical laptops and over 10x on some older computers. The effect is not as noticeable on desktop computers with up-to-date technology.
  • You can now cycle through the previous selections using Ctrl+R. The last 10 selections are saved, however you can increase this via Settings => General Preferences.
  • The Find tool can now search the whole model or just within the current selection.
  • Added paging to the report viewer that speeds up the viewing of large reports and uses a minimal amount of memory regardless of the report size.
  • Design actions for baseplate connections are now taken from the node reaction rather than from the column attached to the baseplate. This is because if other members such as braces were attached directly to the base node then their forces and moments would not be reflected in the column design actions and hence would be missing from the connection design.
  • Added options for the portal frame builder to generate longitudinal roof bracing.
  • The steel member design now allows the user to set the desired availability and use only those library sections that comply. This allows you to avoid sections that are obsolete or hard to obtain when doing a steel member design.
  • Now optionally include dynamic natural frequencies, dynamic modes shapes, buckling load factors and buckling effective lengths when exporting to text files.
  • When drawing, if you click when a node is highlighted, even if the node isn’t quite inside the pick box then the node gets attached to. This change was made for people who assume that if a node is highlighted then you can attach to it regardless of whether it is inside the pick box or not.
  • Now show the progress when generating large reports.
  • Allow cancelling out of the generation of text reports and text file exporting.
  • The Ok button now only appears in datasheets after a change has been made. Previously, analysis and/or design results would be lost if Ok was clicked without any changes being made.

Version 12.51 (build 12.51.500)

  • Released a new version of the portal frame builder containing a completely re-written engine and new user interface. Note that build 500 is the first one with the new portal frame builder.
  • Roof wind loads were being generated with the wrong sign in the old portal frame builder for upwind roof slopes of 10 degrees or more with crosswind wind directions. Upgrading to the new portal frame builder eliminates this problem.
  • When in script mode you can now pause SPACE GASS, edit the script file and then restart the new script file from the beginning without shutting down SPACE GASS.
  • The PAUSE command in script files can now include a comment that is displayed when the pause happens.
  • No longer find false duplicates during a cleanup due to members having the same node at each end.
  • No longer merge nodes during a cleanup if they are connected to the same member.
  • Added new tubular connections for slotted end connections, welded tee connections and flattened end CHS connections. They are available with bracing cleats or gusset plates for up to three supported members.
  • Added being able to graphically select steel members and then open a datasheet of the selected steel members when in steel member viewing mode.
  • Added a tool for generating tapered surfaces made from plate elements, useful for tapered walls and the like.
  • Now calculate mass participation factors in the dynamic frequency analysis and include them in reports.
  • Now show the critical load case in result query infotips when displaying analysis diagrams with enveloping turned on.
  • Improved the ability of the Paradise solver to detect instabilities in models containing cables.
  • No longer automatically turn on deflections when showing plate contours.
  • No longer turn off the “View plates” button when showing plate contours.
  • Increased the dynamic mode limit to 1000.
  • Changed the spectral load datasheet and reports to have just one line per load case with a list of modes rather than requiring a separate line per mode.
  • Now allow negative pressures when using the varying plate pressure loads tool.
  • Included a number of minor bug fixes and improvements.

Version 12.50 (build 12.50.447)

  • This is a substantial upgrade that contains a number of new tools and improvements.
  • Fixed a problem in the portal frame builder that caused "Region A" wind speeds to be used regardless of which region was selected. This problem was only present in v12.50.431 which was released on May 5, 2016.
  • Added support for hardware accelerated graphics with most modern graphics cards. Previously this was only available for some NVIDIA, ATI and AMD graphics cards. Hardware accelerated graphics not only offers graphical speed increases of 100x or more, but you also get fully rendererd deflections and shaded/transparent analysis result diagrams.
  • The library editor now displays the fully dimensioned cross section for the currently selected section.
  • You can now query analysis result diagrams by just moving the mouse cursor over them. The value of the diagram at the cursor location is displayed in an information box.
  • Added a centre of reactions calculation to the reactions report.
  • Now allow for transposed sections when importing Microstran ARC files.
  • Now allow copying to the clipboard from the combination load cases datasheet.
  • Added an option for higher resolution "true type" graphical text.
  • You can now change the graphical text size.
  • Added an option to turn off DPI awareness in SPACE GASS for people who prefer larger (but slightly less clear) screen text.
  • Section names and numbers can now be labelled on members.
  • You can now label just the end points, maximum points or both on analysis diagrams for members. Previously the end points and maximums were always labelled together.
  • Added support for Revit 2017, fixed some minor bugs in Revit 2016 imports and removed importing from Revit 2015.
  • Corrected the portal frame builder loads and service factors for NZ region W because they were being calculated for region C by mistake.
  • Transparency is now photorealistic. Previously it was pseudo transparency that wasn't always visually correct.
  • You can now move single nodes, members or plates one after another without having to restart the Move tool each time.
  • Added extra options for the Filter and Find tools that allow you to filter/find members that are vertical, horizontal or aligned with an axis.
  • Added the ability to subdivide relative to a point external to the members being subdivided. This means that you can do things like subdividing a selection of members at a point that is 10.5m above ground level for example.
  • Added a new plate taper generation tool. This can be useful for modelling walls that have a varying thickness such as retaining walls or tanks.
  • Added a new tool to copy members or plates to multiple locations. Once you have selected the members or plates to be copied you can then just click multiple locations to have them copied there.
  • Added a new Extrude tool that allows you to select multiple nodes and then extrude members from them in any direction.
  • Added support for IS800 (India) to the steel member design module.
  • Added support for IS456 (India) to the reinforced concrete beam and column design modules.
  • Added support for IS1893 (India) to the spectral analysis module.
  • Added new tubular connections to the AS4100 steel connection design module.
  • Added a fixed baseplate connection to the AS4100 steel connection design module.
  • You can now set the colour and transparency of filtered-out members and plates.
  • You can now select some steel members, right-click and then open them in a datasheet.
  • You can now double-click on notes to edit them.
  • The viewcube is moved to the left and is now combined with the global axes.
  • The global axis labels no longer disappear when the graphics screen loses focus.
  • The “Help => About SPACE GASS” screen now shows detailed info about the user’s system.
  • A number of improvements and fixes were added to the IFC and CIS/2 imports and exports.
  • A number of improvements and fixes were added to the Revit imports.
  • Fixed a bug in the portal frame builder if uneven bay spacings were used. It affected all “wind from the left” load cases (ie. load cases 5,10,11 and their combinations). The bug effectively treated the model as if the bay spacings were in the reverse order for the load cases involved.
  • During a steel member design/check, the minor axis compression effective length is now limited to the maximum distance between full and partial restraints if "Adjustments of minor axis compression effective length" is ticked. This makes the design/check less conservative if the reduction applies.
  • You can now import backup and ZIP jobs with a different name to the current job.
  • Added an option for getting principal forces and moments for members in text reports.
  • Changed the base shear scaling in the spectral analysis module for the "General" code so that it only takes effect if it increases the base shear. Previously it always adjusted the results to match the specified base shear scaling, even if that involved reducing the calculated results.

Version 12.27 (build 12.27.365)

  • Includes a new moving loads tool that allows for stationary and moving loads in the form of vehicles, pressure patches and line loads. Loads can now be applied to plates as well as members, plus a proximity distance setting lets you model multi-level roadways with different moving loads on each level.
  • Fixed a critical bug in the new steel connection design module affecting beam-to-beam connections in which the major and minor axis shears may be incorrectly swapped. Only web side plate, flexible end plate and bolted angle cleat beam-to-beam connections are affected. Tubular connections are not affected nor are connections designed with the old steel connection design module. This bug affects versions 12.23 to 12.26 inclusive which were released between May 1 and December 24, 2015.
  • When importing a CIS/2 or IFC step file, the model being imported is now moved to the global origin by default. This is to avoid finishing up with huge node coordinates if the data in the file is in “World” coordinates. The moving can be turned off or the destination position changed if desired.
  • Sped up the process dramatically when importing from MS-Excel or MS-Access.
  • Included a number of dramatic speed increases of the order of 100x or more when performing operations such as moving, rotating, copying and mirroring.
  • Added node merging to the member subdivision tool.
  • Made the default printer graphics text size bigger.
  • When importing CIS/2 or IFC files, any member offsets of 0.0 are now omitted.
  • Any warnings that occur during a clean-up are now displayed even if there is nothing to clean up.
  • Now support "SHAP" sections when importing Microstran ARC files. These are generally non-library shapes that have their dimensions defined in the ARC file.
  • Replaced the HSS sections in the US library to include the adjustments for reduced wall thicknesses and no longer apply a 0.93 factor to the HSS wall thickness when performing a steel member design/check to AISC 360-10. It is therefore important that SPACE GASS 12.27 or later is not used with pre-v12.27 US libraries.

Version 12.26 (build 12.26.344)

  • When importing DXF files, the data is converted to the current SPACE GASS units, plus the model is moved to the global origin if the DXF file is in "World" coordinates.
  • For AS4100 or NZS3404 steel member design the calculation of αm is now less conservative for segments unrestrained at one end. It now more closely matches the values in table 5.6.2.
  • Steel grades 500, 600 and 700 are now suppprted for PWG, BOX and welded CHS sections in the AS4100 steel member design module.
  • For an unbraced slender RC column using AS3600 with a non-linear analysis, the moment magnification is now calculated using clause 10.4.2 for braced columns. This means that for a non-linear analysis, λuc is no longer used.
  • For an unbraced slender RC column using AS3600 with a linear analysis, βd is now taken as zero if Le/r <=40 and N* <= M*/2D (clause 10.4.3(2)). A warning is now also generated if ẟs > 1.5.
  • Added an option allowing the user to control the 0.93 factor applied to the wall thickness of HSS sections with AISC 360-10 LRFD/ASD steel member design.
  • Made some changes to the buckling mode shape switching.

Version 12.25 (build 12.25.334)

  • Added filter import/export and copy/paste facilities to the filter management form.
  • Added a standard vehicle library for India which contains the 70R (W), Class A and Class B vehicles from IRC:6-2014.
  • Added access to the relevant old SG config items that are required by the renderer. This means that users can now change things like the storage paths, vertical axis, moments on tension vs compression side, problem size limits, etc. without having to open the traditional SPACE GASS window.
  • Corrected steel flange restraint symbols, top flange symbols and labels not allowing for members with a transposed section in the renderer. Note that this was a purely cosmetic issue.
  • Fixed a bug in the AISC 360-10 LRFD and ASD steel member design modules that affected slender webbed box girders bent about the minor axis. The position of the non-effective part of the web was being calculated incorrectly with an additional max(bt,bb)/2 to the left. This meant that for compression on the right the result was less conservative and for compression on the left it was more conservative. This fix was added in build 326.
  • Now generate high resolution graphical print previews and PDF files. Previously their resolution was quite low and made the text fuzzy and hard to read.
  • You can now set the printer graphics text size for printing from the renderer.
  • When SPACE GASS loads a large job at startup it now displays a message so that it doesn't appear to have frozen.
  • Now prevent "NaN"s from appearing in reports if a member is unstable due to too many fixity releases.
  • Improved the RC column design speed by not checking all load cases after one load case had failed.
  • Circular RC columns can now be designed with more than 32 bars.
  • Added "flat oval" shapes (ie. a rectangle with a semi-circle at each end) to the RC column design module and the shape builder.
  • You can now rename each shape in the shape builder.
  • The drawing plane is now shown next to the mouse cursor coordinates at the bottom of the renderer.
  • Sped up importing of text files by adding a timer to the progress bar text update. The import was being slowed down by the progress bar text being updated for every line read in.

Version 12.24 (build 12.24.303)

  • Released an all new reinforced concrete column module for AS3600 and IS456. The AS3600 version is a free upgrade for all v12 users with maintenance who have the old RC column module.
  • Added support for extra stirrup legs in the RC beam module.
  • Changed the RC beam and RC column modules so that the units in the input form are the same as in the reports. Imperial units are now allowed for too.
  • Moved the standard restraint, constraint and fixity icons from the popup panel into the main panel just below the restraint, constraint and fixity codes.
  • Increased the section "Mark" length to 64 characters.
  • Added extra customizable button items for the individual steel member design codes and for some of the other steel and concrete design tools.
  • Sped up operations by stopping the traditional window doing things while minimized.
  • Stopped SPACE GASS going into demo mode whenever it detected data for an unregistered steel connection, RC beam or RC column module. This would have displayed a demo message even if the steel connection, RC beam or RC column module hadn't been accessed and then prevented you from saving the job. It now only goes into demo mode when you try to create or edit data for those modules that are not registered.

Version 12.23 (build 12.23.277)

  • Fixed a critical bug in the new steel connection design module where the major and minor axis design actions may be incorrectly swapped in the connection design. This bug only affects versions 12.21.225 to 12.22.245 which were released between March 13 and April 29, 2015.
  • Added support for Revit 2016 and no longer support Revit 2014.
  • Added the variable plate pressure tool to the renderer.
  • Now allow for spring restraints when merging nodes during a cleanup.
  • Now allow for modes that are outside the min/max frequency range or below the mode shift frequency when displaying dynamic mode shapes in the renderer.
  • Folders with pathnames starting with "\\" are now correctly created by SPACE GASS if they don't exist.
  • Fixed loads sometimes being deleted incorrectly when using the load copy tool in the renderer. For example, if you copied loads from member 5 to member 32 for load case 12, the loads on member 32 would have been deleted in all the load cases that contained loads on member 5. Note that this problem only occurred when specific load cases were listed in the "Copy Loads" form and the "Delete and replace loads on destination nodes/members/plates for the specified load cases" option was ticked.
  • When copying loads in the renderer, all loads on the destination nodes/members/plates are now deleted for the load cases specified if the "Delete and replace loads on destination nodes/members/plates for the specified load cases" option is ticked. Previously, loads were only deleted if they were in a load case that also contained loads on the source node/member/plates. This is now consistent with the load copying tool in the traditional SPACE GASS window.
  • Added Metrol cold formed sections to the AustCold library.
  • The plate thermal loads datasheet now allows you to input just a thermal gradient without also requiring a thermal load.
  • Added the two node ends to the top of the taper haunch form to allow you to notice the direction of the taper/haunch.
  • Added swap buttons next to each "from" and "to" value in the taper/haunch form to easily swap the ends of the taper/haunch.
  • Changed the Eurocode 3 lambda LT, lambda x and lambda y report values to display lambda bar LT, lambda bar x and lambda bar y instead.
  • The Eurocode 3 steel member design module now always regards box girders as welded for determination of the buckling curve.
  • Added an additional shape check to the AS4600 steel member design module to ensure that only shapes related to the specific design option are allowed to use that option.
  • For the reinforced concrete beam module you can now specify a different reinforcing bar library for each design code.
  • In the reinforced concrete beam report, under shear and torsion sections, the capacities in shear and in torsion of the ties have been removed. Instead, the required / provided amount of transverse reinforcement is reported.
  • Now show which diagram types are turned on in graphics reports from the renderer.
  • The shape builder now correctly allows up to 10 shapes when importing. Previously it was not allowing an import if there were 8 or more shapes.

  • The following items all relate to the reinforced concete beam module:
  • Added user input options to proportion shear and torsion requirements on transverse ligatures.
  • The critical zone / specific zone reports now display the stress ratios for all bending/torsion/shear ratios for the specific zone as well.
  • The critical zone / specific zone reports no longer show overall stress ratios for each zone.
  • Added a 2D longitudinal section image.
  • Placed a cross through the longitudinal image if the overall check failed.
  • Placed a cross through the zone cross section if the zone check failed.
  • Placed a cross through the image in the beam report if the overall check failed.
  • When exporting to DXF/DWG it will now export all zone detailed cross sections and the longitudinal section.
  • Added standard DXF/DWG text heights when exporting to those formats.

Version 12.22 (build 12.22.238)

  • Released the first batch of tubular connections in the steel connection design module.
  • Sped up the exporting of analysis results to MS-Excel, MS-Access and MS-Word.
  • Fixed the plate contour colors sometimes being incorrect due to a faulty colour transition algorithm when trying to interpolate colours between the user defined colors.
  • Added higher quality printing of the graphics image.
  • Replaced the 3D image in the steel connection design report with high quality 2D images.
  • Can now export high quality 2D images from the steel connection design module to DXF, DWG or EMF files.
  • Added a steel stress limit option to the RC beam module.
  • Now include the maximum stress in the steel in the RC beam reports.
  • Allowed the area load generator to properly take into account member offsets and not generate loads if the member ends didn't match up around the perimeter of an area.
  • Allowed filters based on steel member design results to work properly if steel design results were not turned on in the renderer.
  • Fixed torsion stress diagrams that had incorrect values in the renderer for some section types.
  • Changed the steel connection design module so that the haunch depth is now requested rather than being set equal to the main member's depth (minus the flange thickness and root radius).
  • Sped up the steel member design considerably when high load case numbers were used.
  • Allowed optional exporting of analysis results data in SPACE GASS 10 format.

Version 12.21 (build 12.21.224)

  • The renderer can now avoid the GL_INVALID_OPERATION error that would have occurred if the graphics card couldn't be run in hardware accelerated mode. If detected it automatically turns off hardware acceleration and then displays a message asking the user to restart SPACE GASS.
  • This is the first version of SPACE GASS that has all of the tools of the traditional SPACE GASS window now available in the renderer (along with many other tools that are only available in the renderer) and so an option to minimize the traditional SPACE GASS window and automatically open the renderer at start-up has been added. You can still get to the traditional SPACE GASS window by un-minimizing it.
  • Node, member and plate property panels now only appear in the renderer when required and close automatically when not in use. They no longer encroach on the renderer's viewport because they float on top rather than pushing the model sideways when they open.
  • When using the "Copy Loads" tool in the renderer, existing loads on the destination nodes, members or plates are now replaced if the "Delete and replace..." option is ticked.
  • Now include master and slave nodes in the renderer "Constrained Nodes" filters. Previously only the slave nodes were included.
  • Now properly differentiate between the various equal flanged I-shapes for the AS4100 and NZS3404 steel member design modules. Previously, equal flanged I-shapes were always treated as WBs if heavily welded, PWGs if lightly welded, otherwise UBs. They are now treated as WB/WCs if heavily welded and "WB" or "WC" is in the name, UB/UCs if hot rolled or stress relieved, otherwise PWGs.
  • Revit analytical links can now be optionally exported as master-slave constraints.
  • Added an "Auto pop out" checkbox to the bottom of the legend panel that stops the panel automatically opening if the checkbox is unticked.
  • Added 4th level bookmarks to intermediate member reports so that when exported to Excel each sheet name contains the load case number and member number.
  • Now convert Lysaght and Stramit cold formed section names into the SPACE GASS format when importing.

Version 12.20 (build 12.20.215)

  • This is a substantial upgrade containing many changes, enhancements and fixes. Not all of the changes are listed below.
  • A new reinforced concrete beam design module has been added. To see a video that shows it in action visit www.spacegass.com/training.
  • Tools for querying and viewing steel member design results have been added to the renderer.
  • You can label the steel member number, load factor and governing load case on each steel member in the model. You can also hover over a steel member to have its steel input data displayed in a tooltip.
  • Fixed a problem with the Paradise solver in which slave nodes were given incorrect deflections if their slave degrees of freedom were constrained to master degrees of freedom that were restrained. This generally resulted in ill-conditioning messages and prevented convergence. The Wavefront and Watcom solvers were not affected.
  • Added the auto-create multiple steel members tool to the renderer.
  • A load case title column has been added to the combination load cases datasheet.
  • SPACE GASS job files are now fully compressed so that they are of a similar or smaller size to jobs saved by SPACE GASS 10 or 11. They were not fully compressed in SPACE GASS 12.00/12.01 in an attempt to stop spam filters treating them as spam when emailed.
  • Seismic checks in accordance with chapter 12 of NZS3404 have been added to the steel member design module. The clauses checked are table 12.4(1), table 12.4(3), 12.4.1.2, 12.5.2, 12.5.3.1, table 12.5, 12.7.2.1, 12.8.3.1(a), 12.8.3.1(b), 12.8.3.1(c) and 12.10.3.1.
  • Fixed the AS4600 module re-checking the smallest library section repeatedly if it failed when in design mode rather than trying larger sections. It looked like it was trying larger sections but was still using the properties of the smallest section.
  • Corrected some Sx and Sy values for single angles, tophats and SHS sections in the standard libraries.
  • Corrected the calculation of Sx and Sy for single angle sections in the shape builder. Previously they could have been mis-calculated by up to 15%.
  • Updated (increased) the strength of welds in the metric weld library to the latest specifications.
  • All hollow sections in the Aust300, British, SA, SA-BS, India, US and ChinaGB section libraries have been changed to "Cold-formed". Note that for the AS4100 and NZS3404 steel member design modules, all hollow sections were assumed to be cold-formed anyway, regardless of what was specified in the libraries.
  • Allowed for cold-formed hollow sections in the AS3990/AS1250 and Eurocode 3 steel member design modules. For AS3990/AS1250 this can result in reduced permissible unsupported widths (clause 4.3.2) and reduced Fbc (clause 5.3) compared to hot-rolled hollow sections. For Eurocode 3 this can result in a reduced member compression buckling capacity (table 6.2) compared to hot-rolled hollow sections. Previously all rolled hollow sections were assumed to be hot finished in these codes, regardless of what was specified in the libraries.
  • Now merge steel connection design data when merging jobs.
  • Now adjust filters when nodes, members or plates are renumbered in the renderer.
  • The portal frame builder now generates cross-brace members as tension-only.
  • Fixed the portal frame builder not generating loads on the side columns for monoslope roof buildings if the purlin and girt depth was zero.
  • Fixed a problem with the moving load generator that could have combined loads on a member from different wheels incorrectly if the wheels had loads in different directions. For example, if wheel A had a vertical load and wheel B had a horizontal load, and they should have generated loads at different locations on a particular member, the loads on that member could have had the vertical and horizontal loads generated at one location instead of two.
  • Fixed the area loads tool sometimes applying an incorrect load distribution on quadrilateral areas. This resulted in the correct total load for the area, but the distribution was sometimes applied more to one side at the expense of the other side depending on the direction of the members around the perimeter.
  • Allowed non-library double angles and transposed sections to be designed. Previously their double angle status and transposed information was not transferred into the steel member design module.
  • Fixed member loads with "Actual" positions not being adjusted properly when a member is subdivided in the renderer.
  • When copying, moving, rotating or mirroring in the renderer, node merging now only happens between nodes being copied/moved/rotated/mirrored and nodes not being copied/moved/rotated/mirrored.
  • Restored section name template functionality for Revit.
  • Added the ability to select analytical members for export to Revit. Previously could only export physical members.
  • Added some additional cardinal points for centroid and perimeter points for the Revit interface.
  • Fixed a problem with plate thermal loads not being saved properly if input via a memory datasheet in the renderer.
  • Changed the plate drilling spring stiffness from 1e-6 Nmm to 1e-4 Nmm to avoid instabilities in some models.
  • Changed the datasheets so that clicking in a cell selects the current cell contents and lets you overtype it straight-away.
  • Exporting/importing MS-Access files no longer requires MS-Access to be installed.
  • Updated the root radii in the US sections library as per the AISC advisory.

Version 12.01 (build 12.01.175)

  • Fixed a number of minor bugs and potential crashes.
  • Changed the compression method when saving jobs, resulting in substantially smaller SPACE GASS job files.
  • Fixed a potential problem with data files not being saved correctly if their size was an exact multiple of the buffer size (usually 131072 bytes).
  • Corrected the centroid positions for the Duragal Cee and Angle sections and some Lysaght Cee, Angle and SuperCee sections in the AustCold library. For these sections the centroid positions are supposed to be referenced to the centre of the leg/web rather than the outside edge. These corrections affect the AS4600 steel member design module in its calculation of the effective section properties.
  • Corrected the sign of the loads in the corner columns for the internal pressure load cases generated by the portal frame builder.
  • Fixed the portal frame builder generating loads over only part of the end wall columns for buildings with mono-slope roofs.
  • Added text to plate deflections in the renderer.
  • Now generate deflection envelopes in the renderer.
  • Fixed incorrect moment, shear and axial force diagrams for a member in the renderer when a member concentrated load was applied to the end of the member.
  • Fixed the Seaload module incorrectly taking the ocean current levels as relative to the still water level rather than the model's origin.
  • Fixed some incorrect steel strengths for SHS sections in the SHS350 group of the Aust300 library. These were incorrect in versions 12.00.134 to 12.00.147.
  • Stopped the renderer using the "Maximum load cases displayed together" setting to limit the number of load cases considered when displaying envelopes for "All load cases", "All primary load cases" or "All combination load cases" for jobs that had more than 500 nodes. Displaying envelopes for "Selected load cases" was not affected.
  • Corrected the sign of member forces and moments when using the "Analysis results query" tool in the renderer.
  • Fixed unit conversion problems with reaction diagrams (moments only) and torsion diagrams in the renderer.
  • Adjusted torsion stress diagrams in the renderer to now exactly match traditional SPACE GASS.
  • Fixed members not being updated after nodes were renumbered in the renderer.
  • Re-categorized some of the AS3990/AS1250 "Section checks" to be "Member checks" if they were influenced in any way by effective lengths.
  • Now enable the traditional SPACE GASS window to be restored if minimized.
  • Can now specify different column widths for the combination load cases datasheet.
  • Added steel member design input to the renderer.
  • Adjusted the plate meshing tool in the renderer so that edge members are properly subdivided.
  • Added buttons for Column Tee and Trapezoid shapes to the shape builder.
  • Sped up many operations in the traditional SPACE GASS window such as scrolling through load cases, scrolling through filters, etc.

Version 12.00

  • A major new version with a substantial number of changes and new features.

Version 11.17 (build 11.17.657)

  • Fixed a labelling error that displayed "Degree" units for plate thermal gradients instead of "Degree/Length" units. The thermal gradient calculations were correct but the units were shown incorrectly.
  • Corrected a bug that could have caused incorrect plate actions and stresses to be reported for plates that have thermal loads applied in two or more primary load cases which are then combined into a load combination. The analysis itself is correct and the other plates, members and nodes in the model are not affected, however the combinations involved need to be re-analysed with SPACE GASS 11.17 in order to reset the reported values for the affected plates.
  • Now block members with negatively rotated sections from being checked in the steel member design module.

Version 11.16 (build 11.16.640)

  • Fixed the AS4600 module re-checking the smallest library section repeatedly if it failed when in design mode rather than trying larger sections. It looked like it was trying larger sections but was still using the properties of the smallest section.
  • Corrected some Sx and Sy values for single angles, tophats and SHS sections in the standard libraries.
  • Corrected the calculation of Sx and Sy for single angle sections in the shape builder. Previously they could have been mis-calculated by up to 15%.
  • All hollow sections in the Aust300, British, SA, SA-BS, India, US and ChinaGB section libraries have been changed to "Cold-formed". Note that for the AS4100 and NZS3404 steel member design modules, all hollow sections were assumed to be cold-formed anyway, regardless of what was specified in the libraries.
  • Allowed for cold-formed hollow sections in the AS3990/AS1250 and Eurocode 3 steel member design modules. For AS3990/AS1250 this can result in reduced permissible unsupported widths (clause 4.3.2) and reduced Fbc (clause 5.3) compared to hot-rolled hollow sections. For Eurocode 3 this can result in a reduced member compression buckling capacity (table 6.2) compared to hot-rolled hollow sections. Previously all rolled hollow sections were assumed to be hot finished in these codes, regardless of what was specified in the libraries.
  • Now merge steel connection design data when merging jobs.
  • The portal frame builder now generates cross-brace members as tension-only.
  • Fixed the portal frame builder not generating loads on the side columns for monoslope roof buildings if the purlin and girt depth was zero.
  • Fixed a problem with the moving load generator that could have combined loads on a member from different wheels incorrectly if the wheels had loads in different directions. For example, if wheel A had a vertical load and wheel B had a horizontal load, and they should have generated loads at different locations on a particular member, the loads on that member could have had the vertical and horizontal loads generated at one location instead of two.
  • Fixed the area loads tool sometimes applying an incorrect load distribution on quadrilateral areas. This resulted in the correct total load for the area, but the distribution was sometimes applied more to one side at the expense of the other side depending on the direction of the members around the perimeter.
  • Allowed non-library double angles and transposed sections to be designed. Previously their double angle status and transposed information was not transferred into the steel member design module.
  • Changed the plate drilling spring stiffness from 1e-6 Nmm to 1e-4 Nmm to avoid instabilities in some models.
  • Updated the root radii in the US sections library as per the AISC advisory.

Version 11.15 (build 11.15.639)

  • Fixed a number of minor bugs and potential crashes.
  • Changed the compression method when saving jobs, resulting in substantially smaller SPACE GASS job files.
  • Fixed a potential problem with data files not being saved correctly if their size was an exact multiple of the buffer size (usually 131072 bytes).
  • Corrected the centroid positions for the Duragal Cee and Angle sections and some Lysaght Cee, Angle and SuperCee sections in the AustCold library. For these sections the centroid positions are supposed to be referenced to the centre of the leg/web rather than the outside edge. These corrections affect the AS4600 steel member design module in its calculation of the effective section properties.
  • Corrected the sign of the loads in the corner columns for the internal pressure load cases generated by the portal frame builder.
  • Fixed the portal frame builder generating loads over only part of the end wall columns for buildings with mono-slope roofs.
  • Fixed the Seaload module incorrectly taking the ocean current levels as relative to the still water level rather than the model's origin.
  • Adjusted the Seaload "current-only" loads to properly use the member segments setting and more accurately reflect the load profile.
  • Restored the structure wizard in the traditional SPACE GASS window.
  • In the MS-Access exporting of steel member design results, moved the failure text to the "Failure" column and removed the leading spaces from the failure mode text.

Version 11.14

  • Fixed the plate contour diagrams not including spectral analysis results in combination load cases. For example, if a combination load case included both static and spectral load cases, only the static analysis results were included in the plate contour diagrams for that combination load case. This bug only affected the contour diagrams displayed in the renderer and not the reports, queries or the analysis. It was present in v11.02 to v11.10
  • Now support Revit 2015.
  • Adopted the data locking system used in SPACE GASS 12 to avoid synchronization problems between the renderer and the traditional SPACE GASS window.

Versions 11.11, 11.12 and 11.13

  • These were all non-release versions.

Version 11.10

  • Changed the steel member design "Weighted Average Load Factor" calculation so that the load factor used for each member is limited to 999.0.
  • Changed the moving load generation on members so that multiple loads from the same wheel now share the same sub-load number.
  • Fixed the fabrication code being set incorrectly when importing a v10 Excel file into v11.
  • Fixed the Sea Load marine growth sometimes not being applied to members and plates correctly, particularly when the marine growth extends over only part of a member segment.
  • Fixed the portal frame builder wall loads having the wrong sign and sometimes being incomplete if they were applied to the eave ties and end wall rafters rather than the columns.
  • Fixed the portal frame builder node loads due to surface friction having the wrong sign.
  • Now prompt for load case titles when new load cases are created via a datasheet.
  • Added extra script commands for the steel member design module that allowed the lists of design groups, section properties and load cases to be controlled by the script file.
  • Allowed exporting of steel member design/check summary reports to text and MS-Excel/Access/Word files.
  • Now check for a negative Ixe or Iye during an AS3990 steel member design/check and issue a design error if it occurs. This could occur due to faulty section dimensions in a library.
  • Corrected Bt and Bb being used instead of Btw and Bbw for box sections when calculating Iye in an AS3990 steel member design. This caused Iye to be too small and Rye too large.
  • Changed the order of the columns in a steel member design/check summary exported to text and MS-Excel/Access/Word files.
  • Sped up the AS4600 steel member design module.
  • Fixed an incorrect section property calculation in the AS4600 steel member design module for CHS sections subjected to axial compression.
  • Fixed an incorrect section property calculation in the AS4600 steel member design module for back-to-back Cee sections subjected to bending about the minor axis.
  • Fixed the "Calculate Cb..." and "Calculate Cm and alpha..." options in the AS4600 input form doing the reverse of what was selected.
  • Biaxial moments are resolved into a single moment for CHS sections in the AS4600 steel member design module if Lcx=Lcy and Cmx=Cmy.
  • Allow for mixed upper and lower case commands in a script file.
  • Changed the order of the buckling and dynamic analysis items in the "Analysis" menu.

Version 11.09

  • Released the new AS4100 steel connection design module.
  • Released the new AS4600 steel member design module for cold formed sections.
  • Added the AustCold library containing the latest Lysaght, Stramit and Duragal sections.
  • Added the HSS (hollow steel sections) sections to the US library.
  • Changed the script mode merge option so that it works when the "M" is placed before the file name.
  • The portal frame builder now generates all the connections for the new steel connection design module.
  • Fixed a bug in the portal frame builder where the Ka and Kc,e factors were not being applied to the end wall wind pressures for the cross wind load directions.

Version 11.08

  • Added extra script commands that allowed merging while importing plus more control over the analysis parameters, including specifying which load cases should be analysed. A pause command has also been added for script file debugging purposes.
  • Fixed a problem with the steel member design module that caused the wrong section properties to be used in a code check if the section being checked was a non-library section and the design group had an ignore zone at the finish end. The problem only occurred if the last member in the design group (ie. in the ignore zone) used a different section to the rest of the design group.
  • No longer display a dialog when importing from MS-Excel or MS-Access while in script mode.
  • Updated the connection plate library for the latest sizes and strengths.
  • Fixed an intermittent units conversion problem that sometimes happened when importing or exporting CIS/2 or IFC files.
  • Added "Rounded angle" and "Back-to-Back Cee" shape buttons to the shape builder.
  • Added a new redesigned steel member design form.
  • Fixed a problem with incorrect loads being generated on the right-hand side of monoslope roofs that were generated with the portal frame builder.
  • The load height position in the portal frame builder now defaults to "Centre" for all members.
  • Added a "Services and superimposed dead load" load case to the portal frame builder.
  • Added "1.2G + Wu" combination load cases to the portal frame builder and re-arranged the order of some of the other combination load cases.
  • Fixed an uncommon intermittent fault during a non-linear analysis in which the analysis results file was closed prematurely before all iterations were completed. This only affected the node displacements and reactions of one job in our testing, but could potentially have affected any job. If it happened, the node displacements and reactions displayed graphically and in reports may have been from an intermediate iteration rather than the final converged iteration. The presence of a file called "FOR250" anywhere on your system indicates that it has happened.
  • Moving load vehicle names and their libraries can now be renamed without generating an error.
  • Sections returned from the portal frame builder now contain the complete set of library and calculated properties rather than just the library properties.
  • Changed a convergence parameter in the cable stiffness matrix generator to prevent a lack of convergence in some jobs.
  • Now prevent the steel design of sections that have been rotated or mirrored if they are not a library section.
  • Fixed a problem introduced in v11.06.509 that caused plate stresses to be not read when producing reports or displaying stress contours, resulting in them showing as zero.

Version 11.07

  • Can now import Excel files into SPACE GASS 11 that were created for SPACE GASS 10. Previously there was a problem if the Excel file contained section properties.
  • Reversing vehicles are now permitted in the moving loads generator.
  • Changed the AS3990/AS1250 module so that if the user specifies fully stiffened webs then clause 5.10.2(2) is skipped and Fv=0.37Fy. In the previous release fully stiffened webs resulted in Fv=1.3x0.37Fy.
  • Added support for the pre-release SPACE GASS 12 fast analysis solver.
  • The AS3990 and AS1250 modules now support welded box sections.
  • Options have been added to the AS3990 and AS1250 modules to cater for fully stiffened plates in clause 4.3.2, fully stiffened webs in clause 5.10.2 and resolving biaxial moments into a single moment for CHS sections.
  • Added an "I" restraint on both flanges for the haunched section of rafters in the portal frame builder.
  • Fixed some incorrect flange restraints in the portal frame builder.
  • Fixed the load counters not being set correctly for jobs with more than 32765 loads per load type.

Version 11.06

  • Released the new Eurocode 3:2005 steel member design module.
  • Fixed a problem with the deflected shape and bending moment diagrams of members with spring fixities at either end.
  • Added an option to turn off the rafter prop offsetting in the portal frame builder to make the props connect to the rafter centroid rather than the bottom flange. If the prop is connected to the bottom flange then its fixity at the top is now set to FFFFFF if they stop at the bottom flange to avoid significant torsion being transmitted to the rafter.
  • Made the dummy members more visible after clicking the "View Dummy Members" button in the area load tool.
  • Added Portal Frame Builder and Sea Load menu options in SPACE GASS with messages to go to the renderer.
  • Now suppress "Successful import/export..." messages when importing/exporting while running in script mode.
  • No longer display error messages when importing an Excel file that has some empty sheets.
  • Added support for importing/exporting XLSM files.
  • Can now get to the moving load tool scenario property and vehicle property forms by double-clicking in the left-hand side tree.
  • Can now input a negative radius in a vehicle's travel path to reverse its curvature direction.
  • Removed the elastic line when drawing a moving load area.
  • Now re-check the license whenever the portal frame builder or sea load module is opened.
  • Enabled the "Loads on Walls" radio buttons in the portal frame builder.
  • Fixed steel member restraints not being positioned correctly on rafters in the portal frame builder.
  • Fixed an incorrect sign in the roof loads for front or rear wall wind directions.
  • Fixed the contributing width on rafters for front/rear overhangs in the portal frame builder.

Version 11.05

  • Released the new portal frame builder module.
  • Changed the importing of text files so that if a section's library can't be found but its section properties or dimensions are in the text file, the read values are used and no error is generated.
  • Spaces are now automatically stripped from library items during inputting, renaming or importing.
  • If a filter is active, its name is now included in the output reports.
  • Fixed node loads, prescribed node displacements and lumped masses not being copied if a load case was copied in the renderer.
  • Added extra script command options for analysis convergence accuracy, iterations and load steps.
  • Now enable the load case selection drop down box in the renderer without loads being displayed.
  • Moved the anti-aliasing selection from the renderer's View menu to the Settings=>General menu.
  • Fixed analysis results diagrams sometimes being incorrect for members that have member concentrated loads at the ends due to the duplicate end stations being removed.
  • Fixed some shapes (eg. RHS) being incorrectly transposed by the shape builder if they had a 90deg rotation angle.
  • Stopped adding small P-delta moments for tension members when calculating intermediate moments due to some strange shaped diagrams being produced sometimes.
  • Now allow for shear deformations when calculating fixed end moments.
  • Fixed a units conversion error with moments in the load and reaction sums at the end of each load case in the reactions report.
  • The Find tool in the renderer now stays open if nothing is found.
  • Substantially sped up the saving of loads and the generation of load reports by replacing the old sorting function that was still being used there.
  • For library sections the ry and rz values are now based on the library I and A values rather than the calculated ones.
  • Added more specific information for a solution to some of the temporary license error messages.
  • Increased the loads per load type limit to INT*4 and now default it to 250,000 with a maximum of 5,000,000.
  • Stopped the program from freezing when subdividing members as part of plate meshing.
  • The subdivide tool in the renderer now takes into account steel member design groups.
  • Disabled pattern loading in the continuous beam structure wizard as it was corrupting the load case titles.
  • Moving loads button is now always enabled even if no members have been selected.

Version 11.04

  • Fixed the plate contours showing incorrect values for force and moment contour diagrams (stress diagrams were not affected). This bug only affected the contour diagrams displayed in the renderer and not the reports, queries or the analysis. It was present in v11.02 and v11.03
  • Added support for Revit 2014.
  • Sped up the exporting of MS-Excel and MS-Access files.
  • Added an option to reset any existing member offsets in the haunch generation tool.
  • Addressed the lengthy pause when SPACE GASS starts for the few people who experienced it.
  • Added problem size limit checking to the data entry tools in the renderer.
  • The renderer now refreshes immediately after traditional graphics screen operations that automatically save the data (eg. after datasheets, merge job, structure wizard, etc). Previously it would only refresh after getting focus.

Version 11.03

  • Fixed the plate contours not working properly for spectral load cases.
  • Reversed the changes made to ϕVph and ϕVpv for the AS4100 steel connection design clause 4.8.3.3(b) in build v11.01.175.
  • The size of the temporary stiffness equations in an analysis has been increased from 2Gb to 20Gb.
  • Fixed a divide by zero problem in the adjustment of fixed end moments for members with distributed loads in which the total load was zero. For example, a member with a distributed load varying from 2kN/m to -2kN/m would have this problem. This prevented the analysis from converging in the models we tested.
  • Re-allowed circular bars to be designed in the steel member design modules that support them.
  • The BS5950:2000 module no longer supports slender angle sections.
  • Now allow cold formed tube sections in the BS5950:2000 and Hong Kong steel member design modules.
  • Contours are now properly turned off in the renderer when the analysis results are no longer available.
  • The Intersect tool now correctly updates the local to global matrix of the modified members.
  • Changed the Ctrl-F shortcut to start the Find tool rather than the Draw Member tool.
  • When doing CIS/2 transfers, now allow for Tekla plate names specified as PL instead of PLT.

Version 11.02

  • Fixed the Area Loader not deleting old loads properly when used in one-way mode.
  • Fixed the Area Loader not deleting temporary member connections when used in one-way mode.
  • Fixed the Area Loader creating distributed loads instead of concentrated loads.
  • Fixed the section name conversion not being done if a library name was specified when importing sections from a text file.
  • Added the calculation of overturning moments and base shears to the Sea Load module.
  • Allowed for the selection of the critical phase based on the maximum overturning moment or base shear in the Sea Load module.
  • Fixed the Sea Load loads being generated in the wrong direction if Z is the vertical axis.
  • Made some hardware lock errors use sensible messages instead of a generic one with error code -1.
  • Transferred control of the plate contours to the renderer.
  • Fixed the Sea Load module from tapering off the generated loads near the water surface.
  • Allowed the Sea Load module to accept a greater range of allowable currents.
  • The loads generated by Sea Load on multiple segments of a member are now combined into one if they have the same gradient.
  • The loads from the Sea Load module are now generated in global axes rather than local.
  • Fixed the combining of multiple member distributed forces on a single member into a single load if their gradients were the same. This was using the wrong gradient, plus the gradient comparison tolerance was too fine.
  • Fixed the Sea Load module from using only the CdCmCl values that match the first shape found, and using default values for all other shapes.
  • Added Sea Load warnings if CdCm values couldn’t be calculated or if diffraction theory is required.
  • Updated ϕVph and ϕVpv for clause 4.8.3.3(b) in the AS4100 steel connection design.
  • Re-introduced support for MS-Access importing/exporting.
  • Added filtering of analysis results for exporting to Text/CIS/IFC/Access/Excel/Word files.
  • Changed the data ranges for the Sea Load Cm and Cl parameters.
  • Stopped gridline labels getting bigger after a print.
  • Fixed the section property extra shape data not being transferred to the analysis data after a design and then analysis data update.
  • Expiry reminder messages for roaming licences now start 3 days (previously 14 days) before expiry. Changed the wording of the message a bit too.
  • Updated student expiry date for March 2014.
  • Stopped units conversion of some section property dimensions that are dimensionless. This affected the poly-shape number of sides and the slice/fillet/tophat angle.
  • Poor quality prints and image exports from the renderer have been fixed.
  • Added the Wood-Armer method documentation to the manual.
  • Made a neater PDF manual with proper formatting.
  • Changed the Sp (structural performance) default to 1.0 (from 0.7) for the NZS1170.5 dynamic response analysis.
  • Limited the WALF to 999.0 so that the report didn’t show **********s.
  • Added a PDF version of the user manual.
  • Released the first version of the Sea Load module.
  • The “All Combination Load Cases” item is now removed from the load case selection box in the renderer if there are no combination load cases.
  • Data validation is now skipped in the shape builder if its Help button is clicked.
  • Changed the small P-delta adjustment of intermediate moments for small displacement theory to make it compatible with v10.
  • Box sections that have parallel sides and no outstands are now converted to SHS or RHS sections for the AS1250, AS3990 and SA0162 steel member design modules.
  • Added a message about importing custom libraries from old versions if opening a pre-v11 job and not being able to find one or more of its section libraries.
  • Renamed “Viewcube” to “View selector” to avoid copyright issues with Autodesk.
  • Reversed the extra midspan station added in the previous version for cable members as it interferes with the deflected shape.
  • Fixed the calculation of Iw for Line, Cee, Zed and Tophat sections that have been rotated, mirrored or translated.
  • Fillets are now taken into account in the calculation of Iw for Line, Cee, Zed and Tophat sections.
  • Fillets are now taken into account in the calculation of a section’s shear centre.
  • Added a possible fix for people who have the shape builder image cropped in printouts.
  • Released the first v11 loan and student versions.
  • Stopped prompting for saving changes when closing the Titan client tool if no changes were made.
  • In the Titan utility and admin tools, when browsing for a file to open you now have to click the actual file rather than just get to its folder. It makes it easier to see if the file is there or not.

Version 11.01

  • Fixed a bug that sometimes caused incorrect fixed end moments from lateral member loads in members that had very low axial force in them (ie. typically less than 1kN). It was caused by an equation in the non-linear static analysis that broke down when the axial force approached zero, but wasn't exactly zero. This resulted in a lack of convergence and/or false ill-conditioning messages in some jobs and may have resulted in incorrect non-linear static analysis results in other jobs. The equation was introduced as part of the more rigorous SPACE GASS 11 analysis and wasn't a bug in SPACE GASS 10.
  • Corrected the AISC 360-10 steel member design calculation of equation F3-1 for doubly symmetric I or H sections, where a very small capacity was being calculated in error.
  • Corrected the AISC 360-10 steel member design shear capacity comparison for single angle sections to be based on the geometric shears rather than the principal shears.
  • Corrected the HK2011 steel member design calculation of uniform moment factors to be based on geometric moments for single angle sections in section 8.92 "Member Buckling Resistance".
  • Corrected the HK2011 steel member design plastic section capacity comparison for single angle sections to be based on the geometric plastic modulus rather than the principal plastic modulus.
  • Corrected the HK2011 steel member design calculation of Mx in sections 8.5 and 8.92 for single angle sections, where the maximum Mx in the design group was not being correctly converted to geometric axes.
  • Added separate enveloping for each end of a member in reports.
  • Can now import and export Excel XLSX files.
  • Added support for Revit 2013.
  • Changed the wording in the AISC 360-10 design module input form about adding eccentric moments in general and not just for tension members.
  • For the Hong Kong steel design module, eccentric moments are always added for compression members if eccentric effects are turned on. The option for adding eccentric moments is just for tension members.
  • In the help system, removed the reference to converting Lb to principal for single angle sections during a design/check. This was incorrect and is never done.
  • Fixed the unit conversion for Iw in the shape builder. Was assuming to be Length^4.
  • Added new section property calculations for Iw and shear centre for Line, Cee, Zed and Tophat sections.
  • Added a check in the cleanup tool to stop nodes being merged if they belong to the same plate.
  • Increased the problem size limits in the renderer to match the traditional graphics window.
  • Increased the default section properties limit to 5000.
  • Changed the load case titles viewer so that it gets updated automatically now and doesn’t need the Update button.
  • When opening a job, SPACE GASS now reads the library data for library sections that have their shape data missing.
  • Fixed excessive intermediate deflections in slender members with transverse loads.
  • All of the previously used member and plate properties are now applied to newly drawn members or plates when the “Draw with previous attributes…” option is turned on. Previously only the section and material IDs of the member or plate were applied.
  • Added the contour legend and the section and material property lists to renderer prints and exports.
  • Sped up the display of superimposed diagrams in the traditional graphics window if “All cases” or “All primary cases” was selected.
  • Fixed the non-linear static analysis small displacement theory to be identical to the buckling analysis theory.
  • Removed the frame buckling check from the static analysis finite and large displacement theory due to inconsistent results.
  • For compression effective lengths calculated in a buckling analysis, they are now set to the group length for members with tension or zero axial force. They were previously set to 1.0mm.
  • Messages about the maintenance expiry date are now displayed.
  • For analysis result diagrams, an extra midspan station has been added to each member in case there is no equally spaced station there.
  • An error from importing of section data from Excel and clipboard is fixed.
  • Fit to page setting in page setup has been corrected.
  • Logos for report headers can now be set using the SPACE GASS Utility tool.
    (Start Menu -> All Programs -> SPACE GASS 11 -> Tools -> SPACE GASS Utility)

Version 11.00

  • A major new version with a substantial number of changes and new features.

Version 10.95

  • Fixed a labelling error that displayed "Degree" units for plate thermal gradients instead of "Degree/Length" units. The thermal gradient calculations were correct but the units were shown incorrectly.
  • Corrected a bug that could have caused incorrect plate actions and stresses to be reported for plates that have thermal loads applied in two or more primary load cases which are then combined into a load combination. The analysis itself is correct and the other plates, members and nodes in the model are not affected, however the combinations involved need to be re-analysed with SPACE GASS 10.95 in order to reset the reported values for the affected plates.

Version 10.94

  • Fixed an uncommon intermittent fault during a non-linear analysis in which the analysis results file was closed prematurely before all iterations were completed. This only affected the node displacements and reactions of one job in our testing, but could potentially have affected any job. If it happened, the node displacements and reactions displayed graphically and in reports may have been from an intermediate iteration rather than the final converged iteration. The presence of a file called "FOR250" anywhere on your system indicates that it has happened.
  • Changed a convergence parameter in the cable stiffness matrix generator to prevent a lack of convergence in some jobs.

Version 10.93

  • Stopped adding small P-delta moments for tension members when calculating intermediate moments due to some strange shaped diagrams being produced sometimes.
  • Now allow for shear deformations when calculating fixed end moments.
  • Fixed a units conversion error with moments in the load and reaction sums at the end of each load case in the reactions report.

Version 10.92

  • Changed the intermediate member deflections, forces and moments calculations to give more accurate diagrams and intermediate values for members that are pin-ended at both ends. This could have resulted in incorrect intermediate deflections, forces and moments for pin-ended members that had significant axial force in them.
  • Relaxed the analysis divergence check to match SPACE GASS 11.

Version 10.91 (limited release only)

  • Fixed a crash in the dynamic response analysis if a mass load case higher than the highest input load case was entered in the spectral load data.

Version 10.90

  • Corrected the AISC 360-10 steel member design calculation of equation F3-1 for doubly symmetric I or H sections, where a very small capacity was being calculated in error.
  • Corrected the AISC 360-10 steel member design shear capacity comparison for single angle sections to be based on the geometric shears rather than the principal shears.
  • Corrected the HK2005 steel member design calculation of uniform moment factors to be based on geometric moments for single angle sections in section 8.92 "Member Buckling Resistance".
  • Corrected the HK2005 steel member design plastic section capacity comparison for single angle sections to be based on the geometric plastic modulus rather than the principal plastic modulus.
  • Corrected the HK2005 steel member design calculation of Mx in sections 8.5 and 8.92 for single angle sections, where the maximum Mx in the design group was not being correctly converted to geometric axes.
  • Changed the wording in the AISC 360-10 design module input form about adding eccentric moments in general and not just for tension members.
  • For the Hong Kong steel design module, we now add eccentric moments always for compression members if eccentric effects are turned on. We now ask about adding eccentric moments just for tension members.
  • Added a check in the cleanup tool to stop nodes being merged if they belong to the same plate.
  • Fixed the duplicated error messages in the cleanup tool.
  • Fixed the steel member design query showing “Stress Ratio” instead of “Load Factor” for some of the newer design codes.
  • Sped up the display of superimposed diagrams in the traditional graphics window if “All cases” or “All primary cases” was selected.
  • For compression effective lengths calculated in a buckling analysis, they are now set to the group length for members with tension or zero axial force. They were previously set to 1.0mm.
  • Fixed not being able to open steel design graphical datasheets if no design data exists.
  • Fixed some symbols notation for section properties in steel member design reports.
  • Fixed menu clicks in the traditional graphics window being ignored sometimes.
  • For analysis result diagrams, an extra midspan station has been added to each member in case there is no equally spaced station there.
  • Fixed the steel design twist check for once and for all !
  • Fixed a bug in the calculation of the roamable licenses count. It sometimes caused no new roamable licenses to be available when there should have been some left.

Version 10.87a

  • The impractical section properties check is now a warning instead of an error.
  • Jobs are no longer re-saved automatically if they have been opened and just viewed.
  • Added an analysis error message if thermal gradients have been added to members.
  • If SPACE GASS detects that the job folder that was last used no longer exists (such as when the job was saved to a USB flash drive which was then removed), it just reverts to the default job folder rather than displaying a message and going to the folders and files configuration form.

Version 10.87

  • Released the AISC 360-10 LRFD and ASD steel member design modules.
  • Added an option to the moving loads generator that allows wheels to be ignored if their load is distributed to just one member, unless the wheel is directly on that member. This simulates wheels moving off the loading area while still being between the ends of the travel path.
  • Added a "Weighted Average Load Factor" report to the steel member design output. This allows you to see the weighted average load factor for all the members in each load case and gives you a feel for how efficient the design is for each load case.
  • Fixed the renderer showing double "long-long" equal angles incorrectly.
  • Now prevent duplicate combination load cases while renumbering a load case.
  • Added a Steltech section library for New Zealand welded beams.
  • Included bug fixes in the Revit import/export module.

Version 10.86a/86b/86c

  • Fixed the problem of node loads not being transferred or combined when nodes were merged during a cleanup operation.
  • Fixed an incorrect "members are twisted" message that sometimes appeared during a steel member design.
  • Fixed a renderer crash that occurred if a spring restraint stiffness was greater than 32767.

Version 10.86

  • Sped up the processing of loads in the analysis by sorting them and introducing a more efficient scanning algorithm. This results in dramatic analysis speed increases in models that have large numbers of loads.
  • Corrected the adjustment of intermediate forces, moments and deflections if a member in a design group runs in the reverse direction of the first member in the group.
  • Added a check to see if the members in a design group are twisted by more than 1 degree with respect to the first member in the design group.
  • Fixed the problem of P/A+M/Z enveloped stress diagrams being too large due to the P and M values sometimes coming from different locations along the member.

Version 10.85b

  • Removed the "export successful" message at the end of an export if running in script mode.
  • Included a number of enhancements and bug fixes for the Revit, CIS/2 and IFC import/export tools.
  • Amended the Z factor for NZS1170.5 as a result of the Christchurch earthquake.
  • Now allow for the local minor axis pointing downwards when considering top flange loading in a steel member design. Previously it was always assumed to be pointing generally upwards.
  • Added a check for members in a steel member design group being twisted in relation to each other.
  • Added a check that prevents two nodes of a plate being constrained to each other or to a common master node.
  • Custom library names in the library editor are now colored blue.
  • Corrected the position coordinates being ignored for the structure wizard cylinder made of plates.
  • Corrected a few minor bugs in the plate mesh generator.
  • Allowed for a Titan license being closed after the user had logged off.
  • When importing from other programs, self weight is specified as an acceleration rather than lots of UDLs being generated.
  • Added a special IFC header for exports to Tekla.
  • Now allow offsets to be shown in the renderer when in wireframe mode.
  • Allow for duplicate family names in columns and frames for Revit imports.
  • Fixed an error caused by the Revit member analytical switch being off.
  • Corrected section justification, rigid links and brace-to-brace connections being ignored in Revit imports.
  • Corrected the logic in the Titan client tool's "Test Connection" tool where localhost was always being searched for.
  • Added a limit of 10 servers to be searched for in the Titan client tool.
  • Added a reset button to put the Titan client tool settings back to the factory defaults.
  • Added a beta version of a license launcher for companies that have multiple Titan and/or hardware lock licenses.

Version 10.85a

  • Removed the "export successful" message at the end of an export if running in script mode.

Version 10.85

  • Fixed a bug in the AS3990/AS1250 design modules that caused the effective section properties to not be calculated correctly in some cases. CHS members used as struts or beams are affected if their effective wall thickness has to be reduced in accordance with AS3990 clause 4.3.3. Other section types acting as beams might also be affected but to a lesser extent. All of the sections in the standard Aust250, AustOld and Aust300 libraries are largely unaffected except for some of the 350-450 grade RHS and SHS sections with 2-3mm wall thickness subjected to bending about the minor axis, and some of the 350 grade CHS sections in the 219-355mm diameter range with 3-4mm wall thickness used as struts or beams. Sections from custom or other libraries may also have been affected, particularly if they were thin walled or had large flange outstands. This bug does not affect the AS4100, AISC, Eurocode, BS5950, NSZ3404 or HK2005 design modules.
  • Fixed a bug in v10.84 that caused local member concentrated loads and distributed forces to be treated as global (and possibly act in the wrong direction) if they were applied to a member made from a single angle section or a custom section with a non-zero principal angle. Sections with a zero principal angle such as I-beams, channels, tubes, tees, etc. are not affected. This bug does not affect v10.83 or earlier versions.

Version 10.84

  • Added support for 64-bit Revit 2011 and 2012.
  • Added section name conversions for Australian Bentley and Revit sections.
  • Generally improved the conversion of section names when interfacing with other programs.
  • Improved the importing and exporting of STAAD CIS/2 files.
  • Fixed results being not quite right for members that have lateral loads, end spring releases and a non-zero principal angle.
  • Fixed the error 353 that could occur if an analysis required an optional module that was not licensed to the user.
  • Fixed an analysis out-of-memory error if the total number of elements (members + plates) exceeded 32767.
  • Sped up the member load collection part of the analysis by sorting the loads and then searching the loads lists more intelligently.
  • Improved the plate meshing for circular tanks in the structure wizard.
  • Added rectangular tanks with tapered sides to the structure wizard.

Version 10.83

  • Fixed an intermittent bug that caused some of the thermal loads, member prestress loads and plate pressure loads to not be applied during the analysis in some circumstances. This bug was present in all versions of SPACE GASS from v10.70 to v10.82. We would recommend that you re-run jobs containing the above-mentioned loads in v10.83 or later if they were previously analysed with v10.70 - v10.82.

Version 10.82b

  • Allowed for 5 section property ID digits in graphical display.

Version 10.82a

  • Added Australian section name conversion for Bentley Structural.

Version 10.82

  • Released the new v9.03c version of the TitanLM softlock system. This new version no longer causes a significant delay when there are more than 20 SPACE GASS users on the network.
  • Now allow "."s to be used in filenames without everything after the last "." being taken as the extension.
  • Upgraded the Revit link to support Revit 2011. Note that SPACE GASS models can now be exported via a CIS/2 file to create a Revit 2011 model from scratch.
  • Included v3.5 of LIMSTEEL (AS4100 and NZS3404 steel member design) that allows for welded channels, angles and tees.
  • An error message is now displayed in SPACE GASS when a roaming license expires.
  • The message for missing .NET Framework 2.0 or 3.5 has been re-worded to allow for v4.0 already installed.
  • Fixed load case titles being in the wrong position after being turned on via the labelling and annotation dialogue.
  • Allowed up to 5 digits for the section ID in the member properties form.
  • All SPACE GASS job and other file opening and saving commands are now enabled in script mode.
  • If items selected in a filter were off-screen when a filter dialogue "Select" button was clicked, those items were incorrectly shown de-selected and this has now been fixed.
  • Made a small change to the CIS/2 importer to allow CadWorks files to be imported.
  • Can now import both the CIS/2 and IFC physical and analytical models, and this is the default.
  • Fixed a bug in the CIS/2 export related to mixing up section centroid and centre positions.
  • Fixed a crash in the CIS/2 and IFC section name conversion template creation.
  • Made a number of minor adjustments to the CIS/2 and IFC import/export tools.
  • Added the ability to import CADWorx design parts.
  • Added STAAD.Pro section name conversion to the import/export tools.
  • Fixed a bug that specified the wrong material in the structure wizard plate models.
  • Fixed a bug in the moving load generator that sometimes caused a curved travel path to be the long arc between its end points rather than the short arc.
  • If normal strength bolts were incorrectly specified for bolted end plate or moment baseplate connections (which always assume high strength bolts in the design calculations), the output and drawings showing them as normal strength has now been corrected to show them as high strength.
  • Included the first vehicle distance travelled in load case notes during moving load generation.
  • Improved the accuracy of the cable stiffness in the first iteration by using a more accurate estimate of the initial cable geometry.

Version 10.81d (limited release only)

  • Fixed the RAM allocation error that sometimes occurred when shutting down SPACE GASS.
  • Removed the 5 minute hardware lock queries from the analysis.
  • Removed the hardwired 999 section properties limit in the renderer.

Version 10.81c (limited release only)

  • Fixed a bug in the moving loads generator that occasionally caused a wheel load to not be applied if it fell in the wedge between the normals of the two closest members that were at a slight angle to each other (eg. such as members arranged end-to-end in a curved path). In this situation the load is beyond the end of one member and before the start of the other member even though the two members are connected to each other. This fix applies the load to the common node provided the load falls no more than 1mm beyond the ends of the closest member when projected onto it.

Version 10.81b

  • Fixed a problem that sometimes generated errors when the renderer was opened.
  • Stopped steel member design/check reports being selectable when no results were actually available.
  • Fixed a problem that sometimes caused the copy steel member properties tool to fail.

Version 10.81a

  • A bug that sometimes caused plate loads to be deleted has been fixed. Loads were incorrectly deleted on plates that were either filtered out or were outside of the visible screen area while other visible plates were being deleted.

Version 10.81

  • Released a new improved version of the TitanLM softlock system. Click here for more information.
  • When a node is moved onto and merged with another node, the stationary node is now retained rather than the moving node.
  • If you have set the next node, member or plate number, it is used whenever new nodes, members or plates are added regardless of the method used. Previously it only worked when drawing.
  • The 9999 dimension limit on shape builder sections has been removed.
  • Fix moving loads sometimes missing the first or last position due to a tolerance error.
  • The tolerance for determining if a member is too short when drawing by typing in coordinates is now based on 1mm in structure units rather than 1mm on the screen.
  • Members can now be drawn normal to the screen when using keyboard input.
  • Fixed shape builder shapes containing fillets sometimes calculating a negative Iw.
  • Can now include analysis results in exported CIS/2 and IFC files.
  • Can now import loads from CIS/2 files.

Version 10.80/80a/80b

  • Released the new TitanLM softlock system as an alternative to hardware locks. Click here for more information.
  • Changed the concrete column moment magnifier calculation to stop ds being calculated for braced columns. We have also changed the wording of the configuration variable from “Buckling LF” to “Lambda uc” to reflect what it actually is in AS3600 clause 10.4.3.
  • Fixed analysis optimization not being recognised in script files due to “N” optimization being read from “TON” string by mistake.
  • Fixed some member orientation problems with importing IFC “Design” models.
  • If a security error occurs and you are forced to shut down SPACE GASS, you now get the opportunity to save the job you have been working on under a different name.

Version 10.72a

  • Plates have been added to the bill of materials report.
  • Some problems associated with the renderer's infotips has been fixed.
  • The renderer sometimes losing its link to SPACE GASS has been fixed.
  • The renderer infotips setting is now remembered.
  • A 5mm error in the renderer printing margins has been corrected.
  • Members with no section properties are now drawn as lines rather than very small cylinders in the renderer.

Version 10.72

  • If you hover the mouse over a node, member or plate in the renderer, an infotip showing all of the object's properties is displayed.
  • You can now work in SPACE GASS while the renderer is left open. Any changes made to the model in SPACE GASS are automatically reflected in the renderer. It is especially useful with dual monitor systems, whereby you can have SPACE GASS on one monitor and the renderer on the other.
  • All of the renderer colors can now be set in the renderer.
  • Buttons for rendered, wireframe and centreline modes have been added to the renderer.
  • A link to Inducta SLABS has been added.
  • The conversion of section property names when importing or exporting has been improved.
  • Now properly convert Aust300 UB and UC section names if no decimal provided when importing. For example, “410 UB 54” is now converted to “410 UB 53.7”.
  • Some parts of the analysis have been sped up somewhat when doing plate calculations.
  • The conversion of the compression effective lengths to principal axes for single angle sections can now be skipped if desired during a steel member design or check.
  • Fixed the area loader from doubling up on some areas and missing others.
  • The structure wizard models that have a member or plate option are now separated into separate models.
  • Analysis results can now be included in CIS/2 and IFC exports.
  • A number of bugs when importing or exporting CIS/2, IFC or Revit files have been fixed.
  • Section names are now sorted by size rather than by name when opened in the library editor from the file menu.
  • A number of other minor enhancements and bug fixes have also been added.

Version 10.71f

  • When converting the non-principal compression effective lengths to principal for single angle sections, members specified as braced at the ends for both the major and minor axes have their principal compression effective lengths limited to no longer than the group length.
  • Some minor changes have also been made.

Version 10.71e (limited release only)

  • The analysis crash problem fixed in v10.71c caused incorrect masses to be passed through to the dynamic response analysis module. This has now been fixed.

Version 10.71d

  • Fixed a problem with plate element forces and moments being incorrectly factored up in combination load cases that had not been analysed (ie. combination load cases that were obtained by linear combinations of their analysed child load cases). Note that this problem did not affect plate nodal forces and moments or plate stresses.

Version 10.71c

  • Fixed an analysis crash that happened when the temporary displacements were put onto disk and the temporary reactions were put into memory.
  • Fixed the 3D renderer not drawing a shape builder wedge properly when D1=0 or D2=0.

Version 10.71b

  • Corrected the Z coordinates sign when importing plates from SDNF files with Y-up in SPACE GASS.
  • Fixed the 3D renderer not labelling section names sometimes.
  • Stopped the 3D renderer from showing itself until after it is adjusted for its final size and position.
  • Now remember the 3D renderer sidebar width while SPACE GASS stays running.
  • Fixed a bug that was adding big P-delta effects to intermediate member moments when the shear at either end was released.
  • Fixed the line/arc/helix question sometimes being skipped during a copy.
  • Changed propped portal frame wizard to put FFFRRR restraint at bottom of props instead of FFFFRR.
  • Fixed the conical wizard only producing a cylinder.
  • Fixed the library editor not sorting sections properly.
  • Fixed a few bugs related to exporting to Excel/Access/Word due to running out of memory.
  • Fixed an error when importing plates from Excel or Access.

Version 10.71a

  • Made some further adjustments to the ill-conditioning check.
  • Fixed not being able to read the static analysis header sometimes when displaying graphics. This sometimes presented as a crash.
  • Fixed the subdivide tool not working with more than 50 intermediate nodes.
  • Fixed the query stresses tool not working unless a stress diagram was displayed.
  • Restored the internal 3D viewer due to popular demand.
  • Fixed an intermittent crash when drawing graphically.

Version 10.71

  • Made the ill-conditioning check less sensitive so that it no longer appears prematurely.
  • Now allow the user to set the upper and lower contour range limits.
  • Fixed the slowness in the calculation of forces and moments when a large number of load cases were being analysed.
  • The icons in the 3D renderer are now scaled down for models that have very small elements.
  • Fixed the false ill-conditioning message that appeared when prescribed displacements were used.
  • Fixed the DXF export tool not recognizing the "layer specific" settings.
  • Fixed members remaining selected internally if the Connection tool could not make any connections.
  • When importing a text file, if illegal data is found, all the data of the type currently being read is no longer discarded.
  • Fixed plate pressure load diagrams not being adjusted for a non-zero direction angle/node/axis.
  • Upgraded the Revit link to be compatible with Revit Structure 2010.
  • Fixed the incorrect member orientations and offsets when importing from Revit Structure.
  • Added the components required by the 3D renderer to export rendered models to AutoCAD DWG and DXF files.
  • The position and size of the main SPACE GASS and renderer windows are now remembered.

Version 10.70b/c/d

  • Fixed the 3D renderer not being able to render custom library sections.
  • Fixed the structure wizard sometimes generating a cone instead of a cylinder when plates were selected.
  • Fixed the plate element not being able to be trialed properly in network versions.
  • Fixed the installation program incorrectly reporting that Microsoft .NET Framework 2.0 or later is not installed.

Version 10.70/10.70a

  • The new plate element has been added.
  • Links have been added to commonly used CAD and BIM programs such as Tekla Structures (XSteel), ProSteel, Microstation, Frameworks Plus, StruCAD, Revit Structure, Bentley Structural, AutoCAD and others.
  • When exporting to SDNF the file is now written in v3.0 format rather than v2.0.
  • A new built-in 3D graphics renderer has been added.
  • The minimum and maximum intermediate values are now shown on deflection diagrams.
  • Can now have envelopes of just minimums, just maximums or absolute maximums.
  • Added a node, member and plate connectivity checking tool.
  • During a copy or mirror, restraint springs and master-slave constraints are now copied.
  • Nodes can now be moved, rotated or deleted directly.
  • During a move or rotate, if any nodes or members are deleted during the operation, their loads are now also deleted.
  • Members with a local offset that are cut into during a draw or single node move operation are now converted to a global offset and adjusted correctly.
  • When exporting to Excel, the member and steel member design sheets are no longer converted to text.
  • The default compression effective length ratio limit in the steel member design modules has been reduced to 5.0.
  • In the steel member design modules, now warn if the minor axis compression effective length is adjusted due to flange restraints.
  • Fixed the steel member design failure equation reporting things like “… 4.56 < 1.00 (Pass)”. This was just a reporting problem and didn't affect the results.
  • Stopped the cleanup from deleting “lumped mass-only” load cases from combinations.
  • Added the results of the node equilibrium checks to the reactions report.
  • Added the final strained cable length to output reports.
  • The number of modes per spectral load case has been increased to 200.
  • The dynamic resonse analysis now adopts the user specified value of Sp in NZS1170.5 clauses 5.2.1.2 and 5.2.2.3 instead of 0.7.
  • Changed dynamic response scaling so that it is based on the static force in the vector direction rather than derived from the static forces in the X, Y and Z directions.
  • A number of other minor enhancements and bug fixes have also been added.

Version 10.60

  • The minimum and maximum intermediate values are now shown on bending moment, shear force, axial force, torsion and stress diagrams.
  • If a script file doesn't contain an exit command, SPACE GASS just exits script mode and stays running when the end of the script file is reached.
  • When editing a filter graphically after clicking the nodes or members Select button in the Filters dialogue, nodes or members are no longer deselected when doing a dynamic zoom, pan, rotate or re-scale.

Version 10.52g

  • Applied the limitation on ZRu in NZS1170.5 clause 5.2(2).
  • Fixed the shape builder sometimes calculating the wrong sign for Ixy (and hence miscalculating the principal angle) for sections input by coordinates.
  • Fixed the overflow message that sometimes appeared when running SPACE GASS on dual screens.
  • Stopped exporting summary totals when exporting to MS-Excel/MS-Access.
  • Fixed the “Out of memory” error when exporting large jobs to MS-Access.
  • Added the lock number to error messages that involve lock checking.

Version 10.52e/10.52f

  • Allowed the job name in a command line prompt to be enclosed in quotes.
  • The ZRu <= 0.7 limit in NZS1170.5 clause 3.1.1 is now just applied to the ultimate limit state and is also now reflected in the reported spectral curve multiplier.
  • Prevented typing into the response analysis base shear combo box and changed the default to 100% for NZS1170.5.
  • Removed reduced problem size limits from the student version and allowed buckling and dynamic response analysis.
  • Fixed the steel member design module sometimes reporting a member failure but showing the values for a section failure. It also affected the governing failure equation values because it was a member failure equation using inappropriate section failure values. The problem occurred if the section and member failures returned exactly the same load factor.

Version 10.52d

  • Changed to using the code formulae for the standard AS1170.4-2007 and NZS1170.5-2004 spectral curves rather than interpolating between the discrete curve points.
  • Updated the Revit Structure interface for the new 2009 version.

Version 10.52b/10.52c (limited release only)

  • Made some minor changes.

Version 10.52/10.52a

  • Fixed some errors and added some extra checks to the NZS1170.5-2004 dynamic response analysis module.
  • Released an interface to Autodesk’s Revit Structure.

Version 10.51b (limited release only)

  • Fixed the problem in v10.51 of not being able to delete a steel member design group via the delete button in the graphical input form.

Version 10.51a

  • Fixed the problem in v10.51 of the steel member design data not being saved for a new graphically defined design group if you simply click the Ok button in the input form without changing anything.

Version 10.51

  • The dynamic response analysis module now supports AS1170.4-2007 and NZS1170.5-2004.
  • Negative member numbers in an SDNF file are now accepted.
  • In the shape builder, when a standard shape is saved to a library, it is now treated as a library shape in the SPACE GASS job after exiting the shape builder.
  • The job file is now zipped with less compression than before to avoid the job being treated as spam by many Internet spam filters. It was treated as spam because the @JB file was previously compressed by around 400% due to the large number of zeroes in it if no filters or views were used.
  • A library of Chinese sections has been added.
  • A library of Onesteel aluminium sections has been added.
  • Steel member design results are no longer deleted if you view the design data via the input form and click the Ok button without changing anything.
  • In the steel member design module, a partial restraint applied to the critical flange is now treated as a full restraint on the cross section.
  • Load case titles are now automatically prompted for as load cases are created.
  • Filters and views can now be created without providing a name.
  • When creating a filter or view graphically, the selection dialogue now defaults to the next available unused filter or view rather than the first or active one.

Version 10.50e (limited release only)

  • For Hong Kong licenses, added an option to include buckling mode shapes in reports.

Version 10.50d (limited release only)

  • Fixed members being incorrectly connected if a dynamic zoom, pan, rotate or re-scale was done while drawing.
  • Fixed nodes/members being suppressed or node/member selections being cancelled if a dynamic zoom, pan or rotate was done while nodes or members were graphically being added or removed from a filter.
  • Modified the bending effective lengths for HK CP2005. They were previously assumed to be identical to BS5950:2000.
  • Added an option to choose between clauses 6.8.3 and 8.9.2 for HK CP2005.
  • Fixed a problem with the BS5950:2000 module returning the incorrect load factors for sections with high shear.
  • Changed the method for adjusting intermediate moments from spectral load cases so that they always agree with the end moments.

Version 10.50c (limited release only)

  • Instabilities now refer to the affected node and degree of freedom.
  • Fixed the incorrect quarter point values along the design group for the HK CP2005 and BS5950:2000 steel member design modules. This affected mx (HK 8.9.2) and mx/mxy (BS 4.8.3.3).
  • Removed clause 8.9.2 checks from HK CP2005 and now rely on the user to build initial member imperfections into the analysis model.

Version 10.50b

  • A problem related to filters involving nodes or members being selected while not appearing to be selected has been fixed. The problem only affects v10.50/10.50a and occurs when a filter is created from a graphical selection of nodes or members after which the selected items are deselected visually but not internally. Although the filter is created correctly, if the operation following the filter creation involves you selecting nodes or members graphically then that operation may act on the items you select plus the ones that are still internally selected from the filter creation. Note that the incorrectly selected items become deselected properly as soon as you perform another graphics operation, open a datasheet, generate a report, analyse, etc.
  • Some minor changes were made to the Hong Kong CP2005 steel member design module. This involved enabling equation 8.79 and using the actual member length rather than the effective length in equation 8.80.

Version 10.50/10.50a

  • Dynamic zoom, pan, viewpoint and diagram scaling have been added. You can use the mousewheel or keyboard arrow keys to dynamically zoom, pan, rotate or change diagram scales without interrupting your current operation or losing your node or member selections. Refer to "shortcuts" in the help system for more information.
  • The help system is now HTML and is fully compatible with Windows Vista.
  • The stiffness adjustments for a member during a non-linear analysis are now based on the maximum of the axial forces at the ends of the member rather than the average of the axial forces at the ends of the member. This is slightly more conservative than the previous approach when the axial force varies along the member, but gives more consistent results when comparing loads applied at a node versus loads applied at the end of a member.
  • “D” restraints are no longer used. Restraints are now just “F”, “S” or “R”. Existing jobs will automatically have their "D" restraints converted to "F" when you open them.
  • The standard restraint buttons have been changed and some new ones added.
  • The structure wizard restraints have been revamped and are now generally less restraining.
  • The structure wizard no longer generates a general restraint.
  • The concrete material properties in the standard metric library have been updated. The new values are based on AS3600-2001 clauses 6.1.5, 6.1.6 and Commentary Table C6.1.2.
  • SPACE GASS can be run minimized, normal or maximized depending on the -min, -nml or -max command line options. It can also be controlled by the SHOW line in a script file.
  • Dynamic analyses can now consider up to 200 modes.
  • A message is displayed at the end of a static analysis if any members failed the single member buckling check.
  • Importing/exporting of Excel, Access and Word files now works in script mode.
  • SDNF version 3 files can now be imported.
  • Shape codes for beam and column tees in the US library have been corrected.
  • The incorrect vehicle positions that occurred when a moving load travel path with a radius was used have been fixed.
  • The NZ spectral curves with an “f” at the end of the name not being recognised has been fixed.
  • A number of other minor enhancements and bug fixes have also been added.

Version 10.41

  • A new steel member design module for the British code BS5950-1:2000 is now available. Because this is a completely different code to BS5950:1990 and has involved a complete rewrite for us, you cannot upgrade to it from the BS5950:1990 module. It has to be purchased as a new module.
  • A new steel member design module for the Hong Kong code CP2005 is now available. Note that this module is not supplied for free with the v10.41 upgrade. It can be purchased just like any of the other steel member design modules.
  • To activate a script file, it must now be specified as a command line option.
  • The full member geometry for circular tube and solid rod sections can now be included when exporting to a DXF file.
  • If Y is set as the vertical axis in SPACE GASS, when importing a DXF file the coordinates are now converted assuming that Z is vertical in the DXF file.
  • An option for putting members into section-specific layers when exporting to a DXF file has been added.
  • The feature that lets you iterate the analysis-design procedure automatically has been modified as follows:
    a) Added an option for displaying a warning if the lowest buckling load factor is less than a prescribed value.
    b) A warning is displayed if any design errors occur.
    c) The iterations now stop if an analysis error occurs.
  • Fixed the problem of the bending effective length being ignored for Eurocode 3 if specified manually rather than being calculated based on the flange restraints.
  • Added back-to-back LiteSteelTM beam sections to the Smorgon library. At this stage the back-to-back sections can be analysed but not designed.
  • Added an "Austold" library that contains a number of old BHP sections.
  • In the US library, the high strength material properties for pipes, square and rectangular tubes have been changed to match A500 Gr. B in AISC-LRFD Table 2-1.
  • Fixed a few minor bugs.

Version 10.40

  • A new LSBTM module has been added which allows you to analyse and design the range of LiteSteelTM beam products from Smorgon Steel. The design is fully compliant with the latest editions of AS/NZS 4600.
  • After a steel member design, the analysis update feature now allows you to update the analysis section properties with the new design member sizes and automatically iterate the entire update-analysis-design process until the analysis and design member sizes match.
  • A toolbar button for accessing the Quickstart Guide for new users has been added.

Version 10.31

  • The problem of spectral load case bending moment diagrams and reported intermediate moments not agreeing with the end moments has been fixed. Note that this may have affected steel member designs because they are dependent on the intermediate member moments.

    When the results from a number of dynamic modes are combined during the dynamic response analysis, the end shears and moments for a member are no longer in equilibrium. While this is normal and correct, the lack of equilibrium means that the end shears cannot be used in the calculation of the intermediate moments.

    Because there are no intermediate member loads in spectral load cases, the spectral bending moment diagrams are now taken to be a straight line from one end moment to the other.

  • The problem of semi-rigid joint stiffnesses being cumulatively factored due to units conversion in each analysis if the moment units weren't consistent with the force and length units has been fixed.
  • The torsion stress calculations for open sections are now more accurate and less conservative.
  • The Euro and Euro2 libraries incorrectly contained the non-principal moments of inertia for unequal angle sections. They have now been corrected for the principal axes. The Euro libraries also contained incorrect plastic section modulus values for unequal angle sections which have also been corrected.
  • Some new sections have been added to the Euro and Euro2 libraries.
  • Bow and attic trusses have been added to the structure wizard.
  • The structure wizard now allows for cut-off trusses and input of the truss pitch.
  • Member pins have been added to structure wizard truss chords where a change in direction occurs.
  • An option for exporting reports in RTF format has been added.
  • A right mouse button popup menu for copying to the clipboard from the report viewer has been added.

Version 10.30b

  • A problem with a faulty "DOF size mismatch" error in the dynamic response analysis has been fixed.

Version 10.30a

  • Mode shapes from the dynamic frequency analysis in v10.30 were not always accurate unless a very small tolerance was used, even though the natural frequencies were always accurate. Inaccurate mode shapes can cause the dynamic response analysis to give incorrect results, sometimes evidenced by mass participation factors that exceed 100%. The SPACE GASS dynamic frequency analysis can now detect if a mode shape is incorrect and will perform extra iterations automatically to achieve more accurate mode shapes. Note, however, that the accuracy of mode shapes is still dependent, but to a lesser extent than before, on the tolerance used.
  • Extra iterations can now also be automatically performed in the buckling analysis to achieve more accurate buckling mode shapes.
  • The dynamic modes limit has been increased to 200.
  • A crash that could occur in the dynamic frequency and buckling analysis modules with large jobs if many modes were requested has been fixed.
  • A comprehensive range of timber has been added to the standard section and material libraries.
  • A command line option for controlling the location of the SG.INI configuration file has been added.
  • A graphics display problem with tension-only or compression-only members that are disabled in all load cases of an envelope has been fixed.
  • A problem with the thermal/prestress loads datasheet not working due to a counter not being set properly in v10.30 has been fixed.
  • The user manual has been updated to reflect some changes in the way node and flange restraints should be modelled in 2D frames. Refer to the "Node restraints" and "Structure wizard" sections and the portal frame worked example.

Version 10.30

  • A new dynamic frequency analysis module has been added which uses the same wavefront matrix solver as the static and buckling analysis modules. It has the following attributes and advantages:

    a) Uses the wavefront optimizer.
    b) The memory requirement is dependent on the matrix frontwidth which is usually much smaller than the bandwidth used in the previous version.
    c) Can handle much larger jobs than the previous version.
    d) Is faster than the previous version for medium to large jobs.
    e) Has precise frequency shift control.
    f) Can analyse combination load cases.
    g) Self-mass in a dynamic frequency analysis is now specified in the same way as self-weight in a static analysis.
    h) The stiffness matrix from a static analysis no longer has to be saved.

    Note that in developing the new dynamic frequency analysis solver, it was discovered that the old solver missed some higher order frequencies in some models. If this is of significance to you, you should re-analyse with the new solver.

  • The base shear scaling in the dynamic response analysis module has been adjusted to more accurately allow for the summing of the reactions when their sign is controlled by one of the dynamic modes. Note that for AS1170.4 and NZS4203 the direction vector should always be parallel to one of the global horizontal axis directions when auto-scaling of the base shear is activated. The correct way to model an earthquake at an angle to the global horizontal axes is to have a spectral load case for each of the global horizontal axis directions and then combine them into a combination load case using multiplying factors that are proportional to the projected lengths of the desired direction vector.
  • The wavefront optimizer can now be controlled at the start of buckling and dynamic frequency analyses.
  • The shapes of buckling mode shapes are now more accurate.
  • Cancelling an analysis or design session must now be confirmed to avoid accidental cancellation.
  • A variety of triangular trusses have been added to the structure wizard.
  • The color of alternate lines in the datasheets can now be controlled via a command line switch. Select "properties" of your SPACE GASS shortcut and append the contents of the "target" field with -cbbggrr, where bbggrr is the 6 character hexadecimal representation of the desired color with bb=blue component, gg=green component and rr=red component. For example, 50% blue, 50% green and 20% red could be specified with a command line switch of -c7f7f33.
  • Problems associated with saving and opening jobs if the path or job names were the same as the current job but with different case have been fixed.
  • Added the new Smorgon LSB sections to the library.
  • Incorrect labelling of some concrete column cross section dimensions has been fixed.
  • Fixed a number of other minor bugs.

Version 10.22

  • Very small reactions that show up as "0" in the graphics display are now omitted graphically.
  • Shaded areas now print properly when "mono" is not selected.
  • The problem of no graphical envelope being displayed for tens/comp-only members that are disabled for just some of the load cases in the envelope has been fixed.
  • Jobs with no nodes can now be merged into the current job.
  • Steel members that have a satisfactory load factor but which fail the l/r checks are now shown as failed in the graphics display.
  • Steel members that fail the l/r checks can now be defined in a filter.
  • Computers with more than 4Gb RAM are now allowed for.
  • When dual monitors are used, the problem of some forms appearing on the wrong monitor has been fixed.
  • Fixed a number of other minor bugs.

Version 10.21

  • Fixed the flanges being taken as the wrong way around by LIMSTEEL for box or plate girder sections when the top flange is smaller than the bottom flange.
  • When the steel member design bending effective length is specified manually, the use of Lb+ or Lb- is now based on the sign of the design moment rather than the sign of the moment at the start of the segment.
  • Fixed translational restraints being applied in error if the stabilize unrestrained nodes feature was used and the model contained members that were lined up with a global axis, had an offset applied and had a translational fixity release.
  • Negative thermal coefficients are now allowed.
  • The load case selection box on the toolbar is now refreshed after members are deleted just in case it causes any load cases to be deleted.
  • Fixed reports not recognizing filters that are based on steel member design pass/fail criteria.
  • Fixed not being able to open jobs in some network folders.
  • Fixed Sx and Sy not being transposed if Ix and Iy were transposed while saving a section to a library from the shape builder.
  • For graphical reaction envelopes, if the minimum and maximum values for a degree of freedom both have the same sign, then only the largest one is displayed rather than both.
  • Fixed an intermittent crash when displaying the job status.
  • Fixed a number of other minor bugs.

Version 10.20a/10.20b

  • The problem of the program sometimes crashing when generating filtered output reports or graphical printouts, and sometimes showing the wrong filter name in the report headings has been fixed. This occurred only if filters were not numbered sequentially.

Version 10.20

  • An option for SPACE GASS to check for program updates via the SPACE GASS website has been added.
  • The moving load generator is now able to generate combination load cases that combine the moving loads with other static loads.
  • Moving load travel path coordinates, when used in conjunction with travel path node numbers, are now treated as offsets from the path defined by the node numbers.
  • The number of moving load wheels per vehicle has been increased to 200.
  • Custom libraries are now stored in a separate file to the standard libraries. They can also be stored in a different folder to the standard libraries.
  • Your company logo can now be scaled to an exact height that you specify and can optionally be included on every page or just the first page. JPG image formats are now also supported.
  • Saving of loads after graphical editing, importing of text files and report generation have all been sped up dramatically.
  • Zooming via the mousewheel is now centered on the mouse position.
  • An option for allowing duplicate members to be drawn has been added. Finding and filtering duplicate members has also been added to the cleanup, find and filter functions.
  • Deleting members with zero length has been added to the cleanup function.
  • Filters defined in terms of analysis members now also affect steel design reports.
  • Options for suppressing automatic re-scaling of load and analysis results diagrams have been added.
  • The lowest buckling load factor is now displayed at the end of a buckling analysis.
  • The end offset distance for members exported to a DXF drawing file can now be specified.
  • The problem of some members being shown in the VRML viewer with the incorrect orientation has been fixed. This problem only affected near vertical members (ie. those with a horizontal difference of less than 1mm between the coordinates at each end) that had their local x-axis pointing downwards. It did not affect members that were exactly vertical or members that weren't close to being vertical.
  • Filtered reports now include the name of the filter in the heading.
  • The data generated by the structure wizard is now adjusted according to the vertical axis setting.
  • The default gravity direction in the self-weight datasheet is now adjusted according to the vertical axis setting.

  • The following items relate to features that were changed or removed in SPACE GASS 10.00 and have now been re-introduced due to popular demand.

  • New members being drawn graphically can now be optionally given the default attributes or those of the previously accessed member.
  • The starting page number for reports can now be specified.
  • Reports can now be left open while working on other parts of the program.
  • Query toolbar buttons for the frame, analysis results and steel member design results have been restored.
  • The analysis results query window can now handle 500 lines of data.
  • The steel member design "Use previous" button for data input has been restored.

Version 10.10 (limited release only)

  • Auto-created steel members are now terminated at pin-ended members.
  • The default bolt, plate, weld, rebar, spectral and vehicle library names can now be specified in the configuration.
  • Selection of the local XY and/or XZ planes for the display of moments, shears and stresses can now be made direct from the side toolbar rather than via a filter.
  • An option for selecting steel members and connections graphically and then viewing or editing them in a datasheet has been added.
  • The problem of dynamic response analysis results not being proportional to the spectral curve multiplier (SCM) for very small values of the SCM has been fixed.

Version 10.01b/10.01c

  • If not all steel members have been designed or checked, when you attempt to show the results graphically an error message appears stating that the results data cannot be read. This message is incorrect and has now been removed.

Version 10.01a

  • Fixed a units conversion problem with the steel member design if the selected length, force and moment units were not consistent with each other.
  • Prevented the screen graphics being displayed in mono if the printed graphical output was specified for mono.

Version 10.00/10.01

  • A major new version with a substantial number of changes and new features.

Version 9.03

  • When designing with single angle sections, the method that was introduced in v9.00 to convert the compression effective lengths from non-principal axes to principal axes may, in some cases, result in unconservative designs.

    The pre-v9.03 procedure calculated the principal effective lengths so that the member's Euler buckling capacity for buckling about the principal axes using the principal effective lengths was the same as its capacity for buckling about the non-principal axes using the non-principal effective lengths.

    This results in a minor axis principal effective length (Ly) that is often smaller than either of the non-principal effective lengths (Ln and Lp). It also means that Ly/ryy is often smaller than Lp/ryy which some codes such as AS3995 base their strut design upon.

    Consequently, a change has been made that prevents Lx and Ly from being less than the minimum of Ln and Lp.

    Note that this change does not affect members designed to AS3990 or SABS0162.

  • The check for combinations that contain non-existent load cases that was introduced in v9.02 has now been made optional.
  • The problem of "unstable" buckling modes being incorrectly reported for some load cases after a buckling analysis has been rectified.
  • The problem of bolted end plate flange fillet welds being incorrectly reported as being required on "1 side" only has now been changed to "2 sides".

Version 9.02

  • The problem of the cleanup feature deleting combinations of combination load cases has been fixed. This will affect you if you have been using the cleanup feature and you have combined combination load cases into further combinations.
  • The problem of other programs moving in front of SPACE GASS and hiding it after you exit from a SPACE GASS datasheet (and some other forms) has been fixed.
  • A few of the steel connection design datasheet column headings were out of sequence and were incorrect for the data being displayed under them. They have now been fixed. The affected headings are haunch length and depth, weld categories and flange weld type.
  • It is now possible to save jobs containing a space in their name to a network drive.
  • The steel member design module speed has been further increased.
  • Double angle sections have now been properly allowed for when running a steel member design with the "Equalize Design Sizes for Matching Analysis Sections" feature activated.
  • Segment and effective lengths have now been added to the steel member design query form.
  • A crash that occurred when exporting thermal/prestress loads to Excel has been rectified.
  • Support for Dutch factors has been added to the Eurocode 3 steel member design module.
  • The steel member design slenderness ratio check has now been made optional. It is not required by AS4100, NZS3404, Eurocode 3, AS4600 and BS5950, and now defaults to "Off" for those codes. This partly addresses the problem of members being over-designed as a result of the very long effective lengths that sometimes come from the buckling analysis for very lightly loaded members.
  • The section properties legend displayed at the bottom of the graphics screen sometimes included sections belonging to members that had been deleted. It is now strictly limited to the currently displayed members. Note that the material properties legend includes all materials, regardless of whether they belong to the displayed members or not.
  • Filters are now applied to reports written to a file. Previously, reports written to a file were unfiltered, regardless of the filter selected.
  • A check for combinations that contain non-existent load cases has been added.

Version 9.01a

  • Fixed the problem of incorrect results for analysed load combinations that contain primary cases numbered 16, 32, 48, etc... (ie. those divisible by 16) and further combinations of those combinations. Click here to obtain a small program that searches your computer for any SPACE GASS jobs affected by the bug.

Version 9.01

  • If a non-analysed load combination of another combination obtained its analysis results by a simple linear combination of the analysis results of the primary load cases then its results were incorrect. You can check for these by looking for load cases labelled "linear combination" in the analysis results report. This has now been rectified.

    Note that this problem only occurs with linear analysis and does not apply to combinations that have been analysed or combinations that contain only primary load cases.

  • If an analysed load combination of another combination was indirectly affected as a result of changes you made to the combination load case data, its analysis results were not automatically deleted. This means that its analysis results would be out-of-date until the combination was re-analysed. The affected combination load cases now have their results deleted automatically and have to be re-analysed.

    Note that this problem does not apply to combinations that contain only primary load cases.

  • Fixed not being able to design connections containing haunches.
  • Updated the reinforcement library for the new Australian 500 MPa "N" bars.

Version 9.00e

  • The shape builder "Save to library" button has been activated. This button also lets you create custom section libraries without having to go through the library editor.
  • Double angle sections imported from a library via the section properties datasheet incorrectly had a non-zero principal angle. This has now been corrected and we would recommend that you check your section data if you have used double angle sections in SPACE GASS 9.00-9.00d.
  • The swapping of the chords for trusses generated by the structure wizard has now been fixed.
  • Allowed the taper/haunch feature to work with other than I or H shaped sections.
  • The speed of the steel member design module has been increased substantially.

Version 9.00d

  • The graphical steel member design scan code "Select" button has been activated.
  • When defining custom shapes in the shape builder by entering perimeter coordinates, duplicate points are now allowed.
  • The frame buckling check included in the non-linear static analysis has now been made optional.
  • An "Equalize" feature has been added to the steel member design module. When activated, members that share the same section property number in the analysis data will finish up with the same design member size. For example, this would allow you to keep the left and right columns of a portal frame equal when running the member design module in "design" mode.
  • When designing with single angle sections, the method that was used in SPACE GASS 9.00-9.00c to convert the compression effective lengths from non-principal axes to principal axes was, in some cases, unconservative and this has now been corrected. We would therefore recommend that you re-run the design/check on any SPACE GASS 9.00-9.00c jobs that contain single angles.
  • Widened the datasheets and re-sized some of the column widths to allow more data to be displayed without scrolling.

Version 9.00c

  • When inputting loads graphically, you now have the option of applying a single set of loads to all the selected nodes or members (similar to the SPACE GASS 8 system), rather than having to specify the loads on each selected node or member individually.
  • Fixed the steel member design report crash if all groups had design errors.
  • SPACE GASS 8 libraries can now be imported directly into the new SPACE GASS 9 library format.
  • Library data in text file format can now be imported into the new SPACE GASS 9 library format.
  • The default finish load for member distributed loads is now automatically set to the same as the start load in the datasheets. This allows you to input uniformly distributed loads without having to enter the load value twice.
  • The incorrect units displayed in the prescribed node displacements datasheet in SPACE GASS 9.00-9.00b have now been corrected.
  • Fixed some minor datasheet bugs.
  • Fixed some minor library editor bugs.

Version 9.00b (released to universities only)

  • Removed the check for the old spectral library from the dynamic response analysis.
  • Fixed the case sensitivity of spectral curve names during a dynamic response analysis.
  • Fixed student and university versions not being able to open SPACE GASS 8 jobs.

Version 9.00a

  • Changed the buckling analysis so that buckled members had all their stiffness terms zeroed rather than just the bending terms. This fixed the problem of the buckling analysis and the static analysis buckling check not always agreeing.
  • Capped the buckling Pcr at the local member buckling capacity in buckling reports and steel member design. This effectively imposed a lower limit on effective lengths for members where Pcr previously exceeded the buckling capacity.
  • Lowered the default compression effective length ratio limit to 100.
  • Added messages about why effective lengths could not be calculated for some members in buckling analysis output reports.
  • Fixed some installation problems.
  • Sped up the saving of loads.

Version 9.00

  • A major new version with a substantial number of changes and new features.

Version 8.07b

  • Unit labels KN, KNm, KPa and gs are now shown as kN, kNm, kPa and g's.
  • Analysis and import error messages are now retained after the Ok button has been clicked.
  • Fixed the incorrect self-mass value displayed in graphics mode shape displays.
  • Subset node or member lists are now renumbered whenever nodes or members are renumbered.
  • Fixed the reinforced concrete column input data being lost if the job was saved un-analysed.
  • Allowed for member offsets in bill of materials reports.
  • Addressed a number of other minor bugs and enhancements.

Version 8.07a

  • Dots are now allowed in path and file names.
  • Increased stack size to avoid stack overflow errors in Windows ME.
  • Fixed steel member and connection subsets so that only those groups/connections listed in the subset are enabled.
  • Fixed the insufficient memory error message that sometimes appeared during renumbering.

Version 8.07

  • A new type of hardware lock that plugs into a USB port is now available.
  • Fixed the EURO library plastic modulus being incorrectly input as the elastic modulus.
  • Fixed supressed members (via a subset) being active if one node was off-screen.
  • Changed the strength of "R" reinforcing bars from 400MPa to 250MPa.
  • Fixed not being able to print graphics when viewport 1 is closed.
  • Fixed a number of minor bugs that caused the program to crash under certain circumstances.

Version 8.06e

  • A problem with incorrect units in SPACE GASS versions 8.06 - 8.06d has been fixed. The problem affects some jobs that were saved with SPACE GASS versions 8.06 - 8.06d and causes them to be saved with the wrong units. This means that their analysis results could be out by a factor of 1000 or more. Jobs affected by the problem are as follows:

    a) Any jobs that were saved with SPACE GASS 8.06d, or
    b) Any SPACE GASS 7 jobs that were opened in SPACE GASS versions 8.06 - 8.06d and then re-saved.

    It may be prudent to assume that all jobs saved with SPACE GASS versions 8.06 - 8.06d are affected. Affected jobs can be fixed with SPACE GASS 8.06e as follows:

    a) Open the job with SPACE GASS 8.06e.
    b) Obtain a complete report of the input data.
    c) Compare the data with the units displayed at the top of each section.
    d) If all of the displayed units match the data then the job is Ok. If not, proceed as follows.
    e) Go to the units selection dialog and change the units so that they match the data.
    f) Ensure that the "Convert the current job for any unit changes" check box is not ticked.
    g) Click the Ok button.
    h) Confirm via another input data report that the units now match the data and, if so, save the job.

Version 8.06 - 8.06d

  • Mixed units can now be used and you can specify different units for different parts of the input or output data. For example, you could specify lengths in feet, section properties in inches, moments in Kip-feet and stresses in Psi. Alternatively, you could have lengths in m, section properties in mm, strengths in MPa, moments in KNm and translations in cm. You can even mix imperial and metric units.
  • When you change units, SPACE GASS can now optionally convert all of your data to match the new units.
  • LIMSTEEL 3.3 has been incorporated.

Version 8.05b - 8.05e

  • Incorrect alignment of report headings on two column reports has been fixed.
  • Delays that occurred in network copies of SPACE GASS at the start of an analysis or design (and some other locations) have been removed.
  • Incorrect page numbers on single column reports has been fixed.
  • Some further installation problems have been fixed.
  • Some network installation problems have been fixed.

Version 8.05a

  • An undo / redo feature has been added.
  • Support for long file and path names has been added.
  • Support for printing through USB ports has been added.
  • Shear stresses in the analysis "Stresses" report are now calculated using the appropriate areas for each section type rather than using the gross cross sectional area. Note that shear stresses calculated during a design have always used the correct areas.
  • Shear stress diagrams can now be displayed graphically.
  • SPACE GASS can now open job files that have been renamed externally.

Version 8.05

  • Not released commercially.

Version 8.04b

  • Support for a new type of hardware lock that works with all versions of Windows, including Windows 2000, has been added.

Version 8.04a

  • The very thick lines in graphical printer output that occurred on some systems in 8.04 has been fixed.
  • The crash that occurred in 8.04 when exiting from the shape builder has been fixed.

Version 8.04

  • Steel member design for AISC-LRFD has been added.
  • An uninstall option is now available.
  • You can now double click on a job file to start SPACE GASS with the job loaded.
  • You can now specify the printer line thickness for graphical output. Previously, SPACE GASS lines on high resolution printers came out very thin.
  • Support for Windows 3.11 has been discontinued.
  • If you zoom in on a member so that both of its ends are outside of the drawing area, the visible part of the member is still drawn. Previously, members were not drawn unless at least one end was visible.
  • The problem of node loads not always being deleted with their nodes when requested has been fixed.
  • The US standard sections library has been updated.
  • The text editor (with path) can now be specified in the SPACE GASS configuration.
  • A new installation program that avoids the clashes that occurred with some hardware drivers has been incorporated.
  • The problem of built-up shapes (library or standard) being treated as custom shapes when read back in to the shape builder has been fixed. This bug was introduced in 8.03d.

Version 8.03d

  • The subset capacity has been increased to 64.
  • Nodes connected only to suppressed members in a subset are now also suppressed. Similarly, members connected at both ends to suppressed nodes in a subset are now also suppressed.
  • A one-way loading option has been added to the area loader.
  • The very narrow triangular loads placed at the ends of some members by the area loader have now been eliminated.
  • During arc generation, arcs can now be defined by specifying the radius, chord deviation, centre angle or arc length.
  • The problem associated with renumbering of nodes that have spring restraints has been fixed.
  • Not being able to edit the coordinates for custom shapes in the shape builder has been fixed.
  • It is now possible to get analysis results for items selected using Find.

Version 8.03c

  • Steel member design for Eurocode 3 has been added.
  • Calculation of the R value in BS5950 clause 3.5.4 has been changed.
  • Fixed not being able to create a nodes subset from the right mouse menu.

Version 8.03b

  • Not released commercially.

Version 8.03a

  • A BS5950 steel member design check for channels with Iw = 0.0 introduced in 8.02b was inadvertently applied to all sections rather than just channels. This has now been fixed.

Version 8.03

  • An area loading facility is now included as a standard feature. This allows you to select a group of members that form one or more surface areas, specify a surface pressure and direction, and then have SPACE GASS calculate the equivalent member distributed loads.
  • Member concentrated loads and distributed forces are now automatically sub-divided and re-distributed whenever members are sub-divided or broken into as a result of a SUB-DIVIDE, DRAW, MOVE or INTERSECT operation.
  • A new scale nodes feature has been added. You can use this feature to enlarge or shrink parts of your model by a scale factor that you specify.
  • SDNF (Steel Detailing Neutral Files) files can now be imported and exported by SPACE GASS for direct interfacing to steel detailing packages such as Frameworks, XSteel and others.
  • Real numbers in SPACE GASS text files no longer have to contain a decimal point and are no longer limited to 10 digits. Furthermore, real numbers in text files generated by SPACE GASS are now 15 digits long. If you have programs that read SPACE GASS generated text files then you may have to adjust them to allow for this.
  • SPACE GASS text files can now contain comment lines (preceded by the # character).

Version 8.02d

  • The bug addressed in version 8.02c (see below) still persisted for the material ID number in some circumstances. This has now been fixed.

Version 8.02c

  • A bug introduced in version 8.02b has been fixed. The bug occurred when you selected multiple members graphically and then changed the section or material ID number in the member properties dialogue, resulting in only one of the selected members having its section or material ID number updated instead of all of them.

Version 8.02b

  • The steel member design module for the American Institute of Steel Construction (AISC) - Allowable Stress Design (ASD) specification (June 1, 1989 edition) has been finalised.
  • LIMSTEEL Integrated has been updated to version 3.1.
  • The BHP Duragal sections library has been updated. The changes involve the mechanical properties of the 2.5mm thick CA Duragal Angles in which the yield stress has been reduced from 450 to 350 MPa and the tensile stress from 500 to 400 MPa.
  • Comment lines (starting with #) and blank lines are now allowed in text files.
  • The structure of some of the program's menus and popups has been changed.
  • The second paragraph in section 10.12.7 of the SPACE GASS reference manual beginning "If Ly exceeds..." should be replaced with:

    "Ly is taken as the segment length for segments where Ly exceeds the segment length and:

    (a) both ends of the segment have full or partial flange restraints; or
    (b) both ends of the segment have full, partial or lateral flange restraints and the member is a tube or an equal flanged I-shape or box girder."

    This is different to previous versions in which Ly was taken as the segment length for segments where Ly exceeded the segment length and both ends of the segment had full, partial or lateral flange restraints regardless of the member type.

  • AS4600 segment lengths are now based on the distance between torsional restraints. Lateral restraints on one flange only are ignored.
  • The torsional effective length is now reported for steel member designs to AS4100, NZS3404 and AS4600.
  • The shape builder root radius calculations have now been fixed.
  • The problem of the section source not being changed to "manual" when a property value was changed manually in the member properties dialogue has been fixed. Note that this only occurred when more than one member was selected.
  • The problem of members excluded from a subset with one or both nodes non-existent being shown drawn to infinity has been fixed.

Version 8.02a

  • A pre-release version of the steel member design module for the American Institute of Steel Construction (AISC) - Allowable Stress Design (ASD) specification (June 1, 1989 edition) is included. This can be activated on request.
  • The British sections library has been fully updated in accordance with the August 1998 British Steel specifications.
  • SPACE GASS text files with extensions of CSV (MS-Excel) can now be imported into the program.
  • The shape builder calculation of torsion constants for single angle sections is now more accurate than before.
  • The shape builder calculation of moments of inertia for fillets has been fixed.
  • The shape builder calculation of Sx and Sy is now taken about the plastic centroid rather than the elastic centroid which was incorrect for unsymmetrical sections.

Version 8.02

  • The help system has been completely updated to exactly match the printed reference manual and the program's features.
  • The problem of flipped Tee sections being considered internally by the program as unflipped has been fixed.
  • The problem of no bolt holes being removed from Duragal flanges has been fixed.
  • A warning is now issued in the steel member design output if your specified number of bolt holes per cross section doesn't fit. Previously, only the bolt holes that could be fitted into the cross section were considered.
  • An error in the shape builder causing the torsion constant for solid rectangular or square shapes to be slightly miscalculated has been fixed.
  • On a small number of network types, previous 32-bit versions of SPACE GASS had difficulty opening jobs on a network drive or being run remotely across the network. This has now been fixed.
  • The problem of a steel member design flange restraint sometimes being ignored (and thus causing a longer than expected segment length) has been fixed.
  • A discontinuity in the interaction curve of reinforced concrete columns containing voids has been fixed. This may have caused an incorrect load factor if a line joining the origin with the load point crossed the interaction curve at a point affected by the discontinuity.
  • A number of internal changes preventing invalid input data and resolving some reported program crashes have been made. This includes a problem with jobs that contained spring restraints which, under some circumstances, caused the program to crash.

Version 8.01b

  • The problem of prestress on a cable member having no effect if the cable material's coefficient of thermal expansion is zero has been fixed.
  • DXF files exported from SPACE GASS are now compatible with all new versions of AutoCAD.
  • The dynamic response analysis units conversion problem that occurred with unit systems other than kN,m has been fixed.
  • Enveloping is now available for each intermediate member station rather than just having an envelope for the entire member. This builds on the new enveloping enhancements introduced in version 8.01 (see below).
  • Analysis warning messages now appear in all output reports regardless of the enveloping or sorting options selected.
  • A message has been added to the steel member design output indicating if L/r failure occurred in a non-critical load case.

Version 8.01a

  • Contains some internal security changes that don't affect the user.

Version 8.01

  • Contains new facilities for generating envelopes of analysis results in output reports.

    Load case numbers are now shown with all node and member maximums and minimums. You can also report the matching coincident values that occur at the same location and load case as each maximum and minimum.

    Finally, you can obtain a summary envelope showing the maximums and minimums for a group of nodes and/or members. The summary report also shows the load case numbers and the matching coincident values.

    By default, envelope reports include an envelope summary at the end, however you can limit your report to just the summary by checking the box marked "Produce Envelope Summary Only" in the report generation dialogue.

  • Incorporates the new fully integrated concrete column design module.

    This module is not a standard feature and must be purchased before it can be used. However, if not purchased, you can still access and operate it in a mode that restricts you to a pre-defined column shape. All other features are fully enabled.

    Features of the concrete column design module include:

    • Rectangular, circular, trapezoidal, tee, cruciform and non-standard shapes.
    • Multiple rectangular and circular voids.
    • Multiple reinforcing bars of any size and location.
    • Reinforcing bar library.
    • Numerous methods of quickly generating bar layouts.
    • Calculation of interaction curves for the actual reinforcement, and for other reinforcement percentages that you specify.
    • Allowance for both column tension and compression.
    • Calculation of load factors for X-axis, Y-axis and biaxial bending.
    • Automatic transfer of column geometry, including cross section shape from your frame analysis model.
    • Automatic transfer of loads from your frame analysis model.
    • Allowance for input of extra user-defined load cases.
    • Calculation of multiple load cases simultaneously.
    • Graphical display of the cross section showing all bars and voids.
    • Graphical display of the load application point and the direction of moments on the cross section.
    • Graphical display of the interaction diagrams showing load points and key curve points.
    • Comprehensive output report showing all input and output data in a combined graphical and text format.
    • Single screen user interface that is extremely logical and easy to understand.

  • The SPACE GASS AUST300 steel sections library has been completely revised to include the entire range of BHP's 1998 hot rolled steel sections. All of the 300 grade steel sections available from BHP are included.

    Please note that some of the section names have changed slightly from previous versions of AUST300. This may mean that for old jobs, the SPACE GASS steel design modules may not be able to find the sections that have had a name change unless you first re-input them from the new library into your frame analysis model.

    Note also that this new library supersedes the SPACE GASS library that BHP is distributing directly to engineers on diskette. The BHP diskette is marked "BHP Structural Steel Library 1998" and contains an out-of-date SPACE GASS library.

  • Inconsistent margins in output reports from different printers has been fixed.
  • The error that occurred when reading some files that were generated with new versions of Microstran has been fixed.

Version 8.00E

  • The SGWIN.EXE self check introduced in version 8.00e was found to fail when SPACE GASS was run remotely across some networks. This has now been fixed in version 8.00E.
  • During a steel member design, SPACE GASS now correctly calculates the load height factor for cases when a top flange load is applied at the end of a segment (in the absence of any self weight or other transverse loads within the segment). It does this by detecting the presence of shear force at the segment ends and hence treats the case of shear transfer from other interconnecting members the same as transverse loads at the segment ends.

    Note that previously, in the absence of self weight or other transverse loads within the segment, any transverse loads at the segments ends were ignored when calculating kl.

    The first two paragraphs in section 10.12.9 of the SPACE GASS reference manual should be replaced with:

    "The load height factor kl relates to the point of application of gravity loads. It is always 1.0 if the loads are applied at or below the member's shear centre. It can, however, exceed 1.0 if the top flange is loaded with a downwards load causing a destabilizing effect.

    If the top flange is loaded within the segment then kl = 1.2 for all codes, except AS4100 and NZS3404 where kl = 1.4 if both ends of the segment are fully, partially or laterally restrained or kl = 2.0 if either end is unrestrained.

    If the top flange is not loaded within the segment and shear force is detected at a segment end that is unrestrained then kl = 1.2 for all codes, except AS4100 and NZS3404 where kl = 2.0.

    For all codes, kl = 1.0 if the load height position is specified as "C". If the load height position is specified as "T" then all transverse loads (including self weight) are considered to be acting at the top flange."

Version 8.00e

  • Sxp and Syp being transposed incorrectly in the shape builder if Iy>Ix has been fixed.
  • A duplicate node being created when you "MID/END" attached a new member to the end of an existing member has been fixed. This only occurred when the aperture circle touched the existing member away from its end node.
  • A fault in converting some pre-v6.00 jobs to the latest format has been fixed.
  • A problem with the shape builder calculating the wrong section properties for box girders has been fixed.
  • The BS5950 shear check has been changed. The reduced value of Pyw is only for the calculation of moment and compression and is no longer used in the shear check.
  • A BS5950 reporting problem for when clause 4.8.2 (tension) governs has been fixed. The equation now reports Py instead of Pydes.
  • The default graphics input load case is now the same as the displayed one if there is only one displayed.
  • The load cases combo box on the toolbar can now be changed even if a load case specific diagram is not displayed.
  • The problem of a graphics command exiting automatically when first used after viewing a report on the screen has been fixed.
  • The problem of output for linear combinations (non-analysed combinations) ignoring primary load cases that have a negative multiplying factor has been fixed.
  • The buckling analysis crash that happened if the highest spectral load case number was larger than the highest static load case number has been fixed.
  • Spaces at the end of spectral curve names are now disallowed.
  • Spaces at the end of section names when saved to a library from the shape builder are now disallowed.
  • The program now checks the integrity of the main SPACE GASS program file whenever it is started. This detects any changes to SGWIN.EXE and ensures that no corruption or virus contamination has occurred.

Version 8.00d

  • An academic version that was not released commercially.