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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

Stratford City – Bridge 20

Software Used on this Project

Project Overview


The Stratford City project created a major new mixed-use urban centre on a former railway goods yard in Stratford, East London. It is immediately east of the Olympic Park site and was completed in readiness for the London 2012 Olympic and Paralympic Games. Bridge 20 carries the northern access road across the Network Rail tracks which are on a bridge over the CTRL station box.


The Network Rail tracks were at a skew to the road alignment which meant the span of the bridge had to be reduced to minimise the cost of the structure.

Substantial utilities were carried across the bridge to provide the Olympic village on the north side of the bridge with electricity, water and telecommunications. This requirement and the need to be able to inspect and maintain these utilities over a railway line without interruption to the rail traffic led to the decision to provide a box girder deck in which the utilities could be carried.

How Oasys proved invaluable

To minimise the effective span, Arup developed a single arch scheme in connection with a torsionally stiff deck box and side cantilevers. This approach was more innovative than a traditional ladder beam and slab deck carried by two arches.


The bridge was analysed using Oasys GSA. Over 18 construction stages were modelled, examining permanent, highway traffic, wind and impact loads using linear and buckling analysis resulting in nearly 200 load cases and nearly as many combination cases.

Critical areas such as the bracing diaphragms and arch base were also analysed in detail using 2D finite elements. The complex geometry at the intersection between arch and deck was modelled in 3D and the stress verification was carried out based on the FE analysis.

For this purpose a semi-local model was created, incorporating the 3D FE model into the global beam model. With that method it was possible to take account of the constraint condition for the local model. Loadcases and combinations were still compiled using the global model.


The torsional stiffness associated with a box girder deck made it possible to consider structural configurations with supports along the centre of the deck only. A single central arch with vertical hangers along the median of the bridge was the preferred option.

The shape of the arch was optimised to satisfy structural, architectural and space constraints. To maximise the usable deck space in the “shadow” of the central arch, the width at deck level was kept to a minimum. This was compensated by increased depth, which increased the stiffness of the deck-arch interface for vertical bending. The arch box was widened towards the crown to increase resistance to lateral buckling. For a slender appearance and reduced transverse wind load the depth of the box was reduced while maintaining a near constant area to cope with the axial compression.

The hangers were locked coil closed hangers with fork sockets at top and bottom and an adjustable anchorage at the bottom. Design of the hangers took into account the replacement of any one hanger at one time as well as the sudden accidental loss of one hanger.

The deck was a steel-concrete composite box girder. The steel box girder consisted of a trapezoidal open steel box with cross frames at 3.75m intervals. The construction of the reinforced concrete slab was to be carried out with permanent formwork planks to reduce construction time over the railway line.


The erection sequence was designed to maximise the horizontal tie force in the steel box girder to minimise permanent tension in the concrete slab.

The steel box girder was delivered in pieces to site and assembled via longitudinal spliced joints into units for erection. A total of three units were placed by use of two temporary trestles during a blockade of the railway line. The arch was then also erected in three pieces, with all arch site connections used welded joints.

The stressing of the hangers was designed to lift the deck off the temporary trestles. The side cantilevers were installed after removal of the deck trestles.


Client: Stratford City Developments Limited (SCD)
Structural Design: Arup
Architect: Knight Architects
Contractor: Morgan Est
Contractors Engineer: Benaim (UK) Ltd
Photographs: Robert Meyer
Renderings: Moxon

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