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Privacy and Cookies

Data Security

Website Terms and Conditions

Software Licensing Terms

Privacy and Cookies

We may change this privacy notice from time to time by updating this page.

What information do we collect?

When you use this website, we may collect the following information:

  • the areas of the website that you visit
  • information about your computer, such as which browser you are using, your network location, the type of connection you are using (e.g. broadband, ADSL etc) and your IP address

We do this by using cookies, which are small files that help us track how our visitors use the website and enable us to understand where we can improve your experience. If you would like to find out which cookies we use and the information they track see our Cookies Policy.

Once you submit or register information through our website we will know who you are and your activities on this website and information about you and/or your company may be recorded on our systems. For example, we may ask for personal information when you download our software including:

  • your name
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We may also collect personal information from telephone calls and/or other correspondence with you.

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The information we capture is used for various purposes. The main purpose is to provide you with our services (whether available via the website or offline). We also use the information for:

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We will not provide your personal information to other organisations for marketing purposes without your explicit consent.

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Who do we share this information with?

We may share your personal information with companies acting on our behalf who will only use the information to provide that service. However, we will retain control of your data and any third party service provider that we use must act in accordance with our instructions. We may also share your personal information with a purchaser or potential purchaser of our business.

In some circumstances, we may have to disclose your personal information by law, because a court or the police or other law enforcement agency has asked us for it.

How to get copies of or amend the information we have collected

You may request details of the personal information that we hold about you under data protection laws. If you would like a copy of the information held about you please write to us at oasys@arup.com or at: Data Protection Officer, 13 Fitzroy Street, London, UK, W1T 4BQ. Please note that we may charge a small £10 administration fee for information requests.

If you think any information we have about you is incorrect or incomplete, please email us as soon as possible. We will correct or update any information as soon as we can.

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Data Security

We are committed to ensuring that your information is secure. In order to prevent unauthorised access or disclosure we have put in place suitable physical, electronic and managerial procedures to safeguard and secure the information we collect, including locked cabinets, electronic password protection and pass card access to buildings.

If at any point you suspect or receive a suspicious communication from someone suggesting they work for Oasys or a website claiming to be affiliated with Oasys, please forward the communication to us or report the incident by email to oasys@arup.com or in writing to Oasys, 13 Fitzroy Street, London, UK, W1T 4BQ as soon as possible.

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Website Terms and Conditions

The contents of this web site are protected by copyright and other intellectual property rights under international conventions. No copying of any words, images, graphic representations or other information contained in this web site is permitted without the prior written permission of the webmaster for this site.

Oasys accepts no responsibility for the content of any external site that links to or from this site.

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Software Licensing Terms

Terms and Conditions of Purchase

The full conditions of purchase and maintenance for all Oasys software are set out in the Oasys Software Licence and Support Agreement. All prices are subject to TAX at the current rate.

Prices and specifications are subject to change without notice – please ask for a written quotation.

Although every care has been taken to ensure the accuracy of all information contained herein, the contents do not form or constitute a representation, warranty, or part of any contract.

Superseded Versions of Terms and Conditions

Oasys keeps copies of all superseded versions of its terms and conditions.

Maintenance & Support Services

Twelve months support and maintenance is included with most products. Thereafter maintenance is typically 20% of the current sales price.

An annual maintenance service is available for most programs after the first year.

This service includes:

  • telephone/fax/email/web based support
  • free software updates available via internet download
  • personalised output header for many products

GSA Change Log

All notable changes to GSA will be documented within the change log


GSA – Fixes — General

  • When grid loading is used and only selected results are required the expanded beam loads get deleted when the analysis completes resulting in incorrect results along elements.
    [NCR11310] (Fixed 24 July 2017)
  • The ‘Reset Grid/Face Loading’ command will not clear face loads expanded for load panel elements when there are no grid planes or grid loads in the model.
    [NCR11312] (Fixed 26 July 2017)

GSA Recent Fixes — Analysis

  • Nonlinear analysis does not converge if nodes in a rigid constraint belong to the current analysis stage do not connect to any active elements
    [NCR11319] (Fixed 31 July 2017)
  • If 2D element in-plane thickness is modified, the buckling analysis and p-delta analysis results are incorrect
    [NCR11333] (Fixed 14 August 2017)

GSA Recent Fixes — Design

  • In RC Slab if user dedfined reinforcements are specified, reinforcement areas cannot be calculated.
    [NCR11336] (Fixed 18 August 2017)

New Features

  • The relative displacement option for response spectrum analysis now includes rotations as well as translations.


GSA – Fixes — General

  • GSA refuses to read view settings from a .gwb file if the model sets contain a critical sequence of entity numbers.
    [NCR11268] (Fixed 6 June 2017)
  • GSA crashes if a combination case is input whose descrption refers to an analysis task that does not exist.
    [NCR11286] (Fixed 29 June 2017)

GSA – Fixes — Analysis

  • GSA crashes when doing p-delta analysis and p-delta modal buckling analysis with combination case as p-delta case, the workaround is to use equivalent analysis as p-delta case.
    [NCR11249] (Fixed 22 May 2017)
  • GSA crashes trying to run footfall analysis if no response nodes have been set.
    [NCR11260] (Fixed 31 May 2017)
  • Tool for generating “Spectrum Scaling factors of modes” does not work if user defined spectrum is used.
    [NCR11273] (Fixed 14 June 2017)
  • Beam translational releases do not work correctly in nonlinear analysis if displacements are large.
    [NCR11274] (Fixed 14 June 2017)

GSA – Fixes — Design

  • HK steel design: While checking buckling interaction, the steel checker incorrectly uses the plastic section capacity instead of the elastic section capacity when the section is plastic.
    [NCR11235] (Fixed 9 May 2017)

GSA – Fixes — Table Views

  • 2D Element Loading Thermal: Editing the last row via wizard could crash GSA.
    [NCR11289] (Fixed 16 June 2017)

New Features


  • The output axes are now reported in the Report tab of the Object Viewer. Also if ‘displayed results’ is selected the output axes are set to the output axes of the displayed results.


GSA – Fixes — General

  • When using load panels to distribute load the reference edge can get lost resulting in the load being attributed to the wrong edges.
    [NCR11208] (Fixed 29 March 2017)

GSA – Fixes — Analysis

  • The calculation of modal damping from material damping is incorrect when the model contains elements with releases.
    [NCR11205] (Fixed 27 March 2017)
  • GSA crashes trying to analyse in GSS where there are links in the model that refer to non-existent nodes.
    [NCR11212] (Fixed 31 March 2017)
  • GSA crashes analysing a small number of models containing load panels.
    [NCR11215] (Fixed 3 April 2017)
  • GSA crashes setting up dynamic, P-delta, Ritz and model stability analysis when there are combination cases in the model that refer to non-existent combinations.
    [NCR11216] (Fixed 4 April 2017)

GSA – Fixes — Design

  • When the required reinforcement areas are very small, sometimes RC slab design fails to calculate the reinforcement areas and wrongly shows impossible to calculate the reinforcement areas.
    [NCR11214] (Fixed 27 March 2017)
  • When extra eccentrcity has been defined in RC slab property, the calculated reinforcement areas may not be correct.
    [NCR11223] (Fixed 20 April 2017)

New Features

Interface with Third Party Software

  • The GSA-Revit link is now compatible with Revit 2018.


GSA – Fixes — General

  • GSA crashes when running ‘Create Patterned Loads’ from Tools menu if element list of beam loads is empty. The workaround is to delete this beam load or add element to the element list.
    [NCR11116] (Fixed 19 January 2017)
  • When pasting explicit postions into the assemblies table the units can get lost resulting in the values being interpreted as SI.
    [NCR11121] (Fixed 30 January 2017)
  • Some of the total forces/moments are not written to gwa files.
    [NCR11155] (Fixed 1 March 2017)
  • When reading text files, GSA garbles combination cases with envelopes of combinations that are later in the file.
    [NCR11179] (Fixed 10 March 2017)
  • When reading gwa files some items can get a ‘version’ number added to the name. Ths affects Grid Planes, Grid Lines and Polylines.
    [NCR11181] (Fixed 13 March 2017)
  • When reading section (PROP_SEC) records from gwa files the section formation type is ignored.
    [NCR11193] (Fixed 17 March 2017)

GSA – Fixes — Analysis

  • When node loads are applied to nodes that are inactive in the solution, these loads are still included in the total loads and in the ignored node list. This does not affect the rest of the analysis. This is now modified so that these loads are ignored.
    [NCR11128] (Fixed 6 February 2017)
  • Creep factor defined in stage definition is missed out for thermal load in linear (GSS) analysis.
    [NCR11129] (Fixed 6 February 2017)
  • Creep factor defined in stage definition is missed out in nonlinear (GsRelax) analysis .
    [NCR11130] (Fixed 6 February 2017)
  • If beam element has axial release and the release end is connected to a Link element, the link element forces and moments will not be available from nonlinear analysis.
    [NCR11145] (Fixed 23 February 2017)

GSA – Fixes — Design

  • EC3 steel design: EC3 steel design grade S450 (EN) name is shown incorrectly as S460 (EN).
    [NCR11176] (Fixed 9 March 2017)
  • EC3 steel design: The steel checker incorrectly uses the yield strength when selecting a buckling curve. This sometimes gives a conservative estimate of buckling capacity for S460 steel grade.
    [NCR11187] (Fixed 15 March 2017)
  • When a load design code is set in the new model wizard, the selected code is ignored and reset to Undefined.
    [NCR11192] (Fixed 16 March 2017)

GSA – Fixes — Interface with Third Party Software

  • GsRevit: Orientation of framing members (beams and braces) is not imported into Revit 2016/2017.
    [NCR11120] (Fixed 24 January 2017) (Released in GsRevit_R16/R17

New Features

GSA – New Features — Analysis

  • Footfall analysis using AISC SDG11 (Vibrations of Steel-Framed Structural Systems Due to Human Activity) 2nd edition for walking on floor, walking on stair and running on floor.
  • Load panel elements can now be bounded by zero length link elements as well as beam/bar elements. This allows for modified ‘releases’ to be set in different stages. No load is applied to the link elements. An additional check is made for load panels that are bounded by coincident elements.

GSA – New Features — Design

  • In RC slab design, a new parameter (user defined additional eccentricity) is added to RC slab property, this will allow users to explicitly define this additional eccentricity to consider the slenderness effect of the RC slab/wall when in-plane forces are significant.

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