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Terms & Conditions


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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

Support and maintenance is included with all subscription licences for their full duration.

Annual maintenance contracts are available for software under a perpetual licence, prices are based on a percentage of the most recent list price.

This service includes:

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

National Assembly for Wales

Software Used on this Project

Project Overview

The National Assembly for Wales is a multi award winning* project located in a prominent and prestigious waterfront site in Cardiff Bay. Arup, acting as the structural engineer, worked alongside architect Richard Rogers Partnership and contractor Taylor Woodrow Construction on the project.

One of the design goals of the architects was to create a transparent floating roof by providing lateral building stability using tight, slender vertical supports. The effect was achieved by a full height glazed façade to the underside of the oversailing steel-framed roof. The internal floors are reinforced concrete. The 5,000m2 building includes a primary debating chamber, three committee rooms, offices, public space and viewing galleries.

How Oasys proved invaluable

Structural Principles

The roof geometry is formed by the intersection of six tori through a large cylinder as indicated below.

Roof geometry

There are six roof modules, five of which are typical and one that supports the bell and lantern structures. Each module is 12m by 41.5m with the end modules extending a further 2.5m on their long edge. The total plan area of the roof structure is approximately 3200m2.

The steel roof structure acts as an offset tied arch in the transverse direction. The two main arches, which span 26m, are inclined at approximately 45 degrees and have an arching ratio of approximately 1:8. The vertical thrust at the base of the arches is resisted by the primary columns and the horizontal thrust is resisted by offset ties. These ties are connected to the foot of the arches by angled struts. These angled struts also support the perimeter cantilever, which extends up to 15m at the corners of the roof. Consequently, these elements are tapered and generate a push-pull action between the main column and the side of the braced dome. The longitudinal roof members, which form the undulating roof profile, span simply from arch to arch. All the other longitudinal members are straight simply-supported beams.

Lateral stability of the roof is derived from a series of pre-stressed rods. Lateral loads on the roof are transferred to the stability members by the braced roof structure acting as a stiff diaphragm. The façade and associated structure is located 2.5m inboard from the edge of the roof structure both being structurally independent of each other. The façade loads are transferred to the stability structure by a series of props at the top of the façade mullions. The stability loads at the base of the ties are transferred to the foundations through a series of reinforced concrete shear walls.

Analysis and Design Process

The design team initially visualized the 3D geometry in Rhino, before using this data to generate the GSA model. The resultant space frame required GSA fabric non-linear analysis, which included cable prestress, temperature and static equivalent blast loads. The results were then exported to Excel for post-processing.

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