Terms & Conditions

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.

All data is stored in secure electronic systems accessible only to Oasys staff with both valid network login credentials and specific authorisation to access the system.  Our systems further limit data access by role to ensure data is available only to those who have a specific need to see it.

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 [email protected] or in writing to Oasys, 8 Fitzroy Street, London, UK, W1T 4BJ as soon as possible.

Data Security Notice Updated 27th February 2020

top ]


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.

top ]



Software Licensing Terms

Terms and Conditions of Purchase

The full conditions of purchase and maintenance for all Oasys desktop software are set out in the Oasys Software Licence and Support Agreement.

The full conditions of purchase and maintenance for Oasys Gofer and Oasys Giraphe are set out in the Gofer SaaS Agreement  and the Giraphe SaaS 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Superseded Versions of Terms and Conditions

Oasys keeps copies of all superseded versions of its terms and conditions.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


top ]



Cookies Policies

View available cookies policies below:


top ]


King’s Cross station redevelopment – roof analysis and design using Oasys GSA

Software Used on this Project

Project Overview

King’s Cross station is London’s busiest transport hub. Arup played a huge part in the redevelopment of the mainline station in collaboration with architect John McAslan + Partners (JMP), which has shaped London’s transport as we know it today. Part of the redevelopment involved designing the now iconic roof structure, whereby both Arup and JMP worked together to master the structural challenges. Oasys GSA was the structural analysis software of choice for the analysis and design of the Western Concourse roof

© Hufton+Crow 

How Oasys proved invaluable

Arup used Oasys GSA with a parametric design approach to develop and finalise the entire roof diagrid and funnel. The engineers faced several structural challenges during this project. One of which being that the London Underground northern ticket hall box was already under construction at the time the roof was being designed. The engineers had to overcome the tricky long span of the structure and the way it would completely bridge over the London Underground. It was imperative that the structural scheme was efficient as well as elegant, did not apply any loads to the Western Range façade, and that it would fit within the curve of the Great Northern Hotel. The structure also had to be welcoming, visually appealing and operationally unifying as it would form a hub to connect the suburban and mainline intercity platforms. 

© Arup 

The ‘tree trunk’ columns at the base of the funnel needed to resist large net lateral thrusts from brand struts which would support the roof. These formed a shell shape in the roof diagrid. The radial forces at the top of the columns are up to 600 tonnes and produce a considerable amount of bending moments in the column itself, as well as large overturning loads at the baseplate. However, the restraint forces in the minor axis are only 90 tonnes in the horizontal direction. The branches are pin ended at the connection to the diagrid shell which allows the roof to articulate and avoid bending forces being transferred from the diagrid radial members into the branches themselves.  

© Arup 

As mentioned above, the long span of the structure presented several structural challenges for Arup engineers. A core part of the structural analysis involved checking in GSA for global and local buckling of the elements under the extremely high loads. 

© Andy Gardner/Arup 

The largest, most visible part of the concourse roof structure are the connections (nodes) between the tree column branches and trunk which had to transfer significant forces from several directions down to the foundations. Following a GSA analysis, it was decided that a solid cast ‘node’ would be the best solution. A 3D finite element model of each node was analysed to optimise the plate thickness and geometry within the constraints of the casting process. Through detailed design of the roof and close collaboration with the architect, no bolts are visible when standing in the station as all the connections are hidden within the structural members themselves.  

© Hufton+Crow 

The use of GSA allowed Arup engineers and JMP to carefully group the connection types which gave some uniformity to the connection design whilst still achieving an efficient and lightweight roof. Overall, GSA analysis and design capabilities produced a clean structure that has no interruptions to the curving geometry of the diagrid.  

We’d like to thank Arup for sharing this work with us. Read more about the project on the Arup website or check out the Arup Journal detailing more about this fantastic project. 

Discover Oasys GSA. 


What is your query?

  • This field is for validation purposes and should be left unchanged.

Newsletter Sign up

Please fill out your details below to receive the latest oasys news.

  • This field is for validation purposes and should be left unchanged.