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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
  • company name
  • email address
  • postal address
  • telephone number
  • country where you are based
  • Social media ID
  • your comments/questions
  • services/markets you are interested in

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

What do we do with the information we collect?

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:

  • website development
  • understanding how our visitors interact on the website
  • understanding what our clients are interested in
  • understanding what potential clients are interested in
  • dealing with enquiries/concerns
  • marketing our services and people to you
  • market research
  • service development
  • internal record keeping


We would like to provide you with information about our services and other information which we think you may find interesting. We may send you such information by post, email and/or telephone, unless you have asked us not to do so.

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

If at any time you do not want your information used for direct marketing purposes, please contact us or follow the unsubscribe link in our marketing email messages.

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

Compos Change Log

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

New Features

  • None


  • Compos sometimes incorrectly checks for the stiffener width requirements for one side stiffener, even when there is no stiffener provided at the opening.
    [NCR 11375] (fixed on 09 October 2017)
  • While saving the file in text format, Compos is incorrectly saving the stud type when non-composite option is selected .
    [NCR 11401] (fixed on 21 November 2017)
  • Program incorrectly reports that member fails in Vierendeel moment at construction stage when it fails at final stage.
    [NCR 11402] (fixed on 21 November 2017)
  • HKSUOS design: Program is sometimes incorrectly setting the number of studs to more than 2.
    [NCR 11403] (fixed on 21 November 2017)
  • Program incorrectly checking for combined buckling capacity using steel section alone in final stage even when the member is designed as a composite member.
    [NCR 10404] (fixed on 21 November 2017)

New Features

New Design Codes

  • Compos now supports design to HKSUOS:11


  • EC4 Design: Program incorrectly reporting the required stud capacity when the section classification falls under the category of class 4
    [NCR 9063] (fixed on 2 June, 2014)(Released in compos.exe
  • HKSUOS:05 Design: Program is incorrectly computing shear stud capacity.
    [NCR 9065] (fixed on 4 June, 2014)(Released in compos.exe

New Features

  • Detailed calculation report
    Compos now produces detailed calculation report in verbose and brief formats. Brief format shows the report at critical sections.
  • New Design Codes
    Compos now supports design to HKSUOS:05.
  • Improvements to the Loads input
    • ‘Linear load’ option is removed as the same can be defined using ‘Patch’ load option.
    • Option to edit start and end distances is added to the ‘Area UDL’ load type.
  • EC4 design: New concrete material C32/40
    New concrete material C32/40 is made available for EC4 design code.
  • Non-composite design option
    An option ‘No studs (non-composite design)’ has been added in stud property page. On selecting this option, Compos analyses the beam as a non-composite beam.


  • Compos resets the mesh reinforcement type to “A142” when the mesh “Reinforcement” page is activated. This happens when the mesh reinforcement type is previously set to “None”.
    [NCR 7684] (fixed on 11 December, 2012)(Released in compos.exe
  • The decking catalogue “Corus_PMF” is now renamed as “TATA”.
    [NCR 7694] (Released in decking.db3, dated 14 December 2012)
  • Compos is using the default shrinkage strain value 0.000325 even after checking the “User defined” check box
    [NCR 7711] (fixed on 24 December, 2012)(Released in compos.exe
  • Deck dimensions for Kingspan Multideck profiles are now changed. This effects Multideck 50 and Multideck 60 profiles.
    [NCR 7839] (Released in decking.db3, dated 14 February 2013)
  • Compos is incorrectly reporting the stresses and strains in concrete in no stud zones.
    [NCR 7888] (fixed on 06 March, 2013)(Released in compos.exe
  • Compos is sometimes unable to distribute shear between tees and slab at web openings.
    [NCR 7976] (fixed on 10 April, 2013)(Released in compos.exe
  • EC4 design: Compos is incorrectly using the cubic compressive strength of concrete while estimating the moment capacities.
    [NCR 8124] (fixed on 19 June, 2013)(Released in compos.exe
  • Compos incorrectly calculating the allowable width of stiffeners at the web opening.
    [NCR 8644] (fixed on 10 Dec, 2013)(Released in compos.exe
  • EC4 Design: Compos using incorrect stud heights while calculating the stud strength reduction factors and for checking the dimension limits of the studs. This applies when decking is present.
    [NCR 8714] (fixed on 16 January, 2014)(Released in compos.exe
  • EC4 design: Compos incorrectly computing the strength reduction factor when the reinforcement position is not below 30 mm from the underside of the stud.
    [NCR 8715] (fixed on 16 January, 2014)(Released in compos.exe

New Features

  • None


  • Program is taking time while creating/opening a file for the first time.
    [NCR 7434] (fixed on 18 September, 2012)(Released in compos.exe
  • Overview is refreshing unnecessarily on cell change events in Table Views.
    [NCR 7435] (fixed on 18 September, 2012)(Released in compos.exe
  • Compos sometimes incorrectly reports the failure message “Global bending resistance is less than bending moment” at web openings.
    [NCR 7436] (fixed on 18 September, 2012) (Released in compos.exe
  • EC4 design: The default value of psi_0 for construction stage is now changed to 1. This is in accordance with clause A1.1 (1) of EN 1991-1-6:2004.
    [NCR 7437] (fixed on 25 September, 2012) (Released in compos.exe
  • EC4 design: The weight of concrete is now treated as live load in construction stage analysis. This is in accordance with clause 2.2 (1) of EN 1991-1-6:2004.
    [NCR 7438] (fixed on 26 September, 2012) (Released in compos.exe
  • EC4 design: While calculating the design forces for the worse load combination of 6.10A and 6.10B of EN 1990:2002, Compos is incorrectly comparing the design forces of 6.10A and 6.10B combinations.
    [NCR 7443] (fixed on 26 September, 2012) (Released in compos.exe
  • Sometimes Compos is incorrectly calculating the construction stage moment capacity.
    [NCR 7456] (fixed on 03 October, 2012) (Released in compos.exe
  • EC4 Design: Compos is incorrectly calculating the stud capacity required when the section is elastic.
    [NCR 7459] (fixed on 04 October, 2012) (Released in compos.exe
  • EC4 Design: Section classification now considers clause of EN 1993-1-1:2004.
    [NCR 7460] (fixed on 04 October, 2012) (Released in compos.exe
  • Web openings are not visible in 3D graphics view when the number of beams is more than one and floor view is switched on.
    [NCR 7467] (fixed on 04 October, 2012) (Released in compos.exe
  • Transverse reinforcement Table View is not updating correctly when switching members.
    [NCR 7468] (fixed on 04 October, 2012) (Released in compos.exe

New Features

  • Compos now allows the user to explicitly enter both the available width and effective width of slab.
  • An option is added to control the steel beam flange rotation on plan at end restraints.


  • Compos is underestimating the web post buckling capacity.
    [NCR 7044] (fixed on 17th April, 2012) (Released in compos.exe
  • The wizard button sometimes not working in the steel beam property page.
    [NCR 7319] (fixed on 14th Aug, 2012)(Released in compos.exe
  • Changes made to the final stage restraints are lost when the restraint page is reactivated. This happens when the construction stage restraint type and final stage restraint type are different.
    [NCR 7320] (fixed on 14th Aug, 2012) (Released in compos.exe
  • EC4 design: Compos is using incorrect modular ratios, when approximate modular ratios are specified in accordance with EN 1994-1-1:2004 clause
    [NCR 7321] (fixed on 14th Aug, 2012) (Released in compos.exe
  • EC4 design: Compos is limiting the effective width of slab to 0.8*times the available width when the decking is running parallel to the beam. This is in accordance with BS5950-3 clause 4.6 (b) and application of this rule to EN 1994-1-1:2004 design is incorrect.
    [NCR 7322] (fixed on 14th Aug, 2012) (Released in compos.exe
  • Compos is using incorrect stud dimensions when non-standard studs are used.
    [NCR 7330] (fixed on 14th Aug, 2012) (Released in compos.exe
  • EC4 design: While calculating mesh bar longitudinal shear resistance, Compos is conservative in assuming that the strut angle is 45 degrees.
    [NCR 7331] (fixed on 16th Aug, 2012) (Released in compos.exe
  • EC4 design: While calculating the longitudinal shear resistance, Compos is incorrectly calculating compressive strut angle and maximum concrete shear resistance.
    [NCR 7332] (fixed on 16th Aug, 2012) (Released in compos.exe
  • The longitudinal shear utilization report is incorrect, when transverse reinforcement is not required and also, when the total longitudinal shear resistance is greater than the maximum resistance allowed.
    [NCR 7334] (fixed on 16th Aug, 2012) (Released in compos.exe
  • Compos is incorrectly using the equivalent circular opening height (0.9*ho) as web opening height when calculating the shear resistance of Tees.
    [NCR 7336] (fixed on 16th Aug, 2012) (Released in compos.exe
  • Compos is incorrectly distributing the shear in top and bottom tees at the web openings.
    [NCR 7338] (fixed on 16th Aug, 2012) (Released in compos.exe
  • Compos incorrectly calculates the effective section properties for the bottom tee at the web opening.
    [NCR 7339] (fixed on 16th Aug, 2012) (Released in compos.exe
  • Unit conversion for reinforcement position in shear studs page is incorrect.
    [NCR 7384] (fixed on 05th Sept, 2012) (Released in compos.exe

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