Crossrail Station Canary Wharf in London, United Kingdom
Customer Project
A unique timber structure has been located in the heart of London since the end of March 2014. In a period of just six months, the Austrian company WIEHAG built the roof with a total length of 984.2 feet for the Crossrail railway station situated in the Canary Wharf business district.
| Structural Engineering |
Planning, Analysis, and Construction of Roofing WIEHAG GmbH Altheim, Austria www.wiehag.com Overall Project Engineering Arup London, UK www.arup.com |
| Architecture |
Design Architect Foster + Partners London, UK www.fosterandpartners.com Executive Architect Adamson Associates Architects London, UK www.adamson-associates.com |
| Investor |
Canary Wharf Contractors Ltd London, UK www.canarywharf.com |
Model
Crossrail is a railway and infrastructure construction project in Greater London, which is to be completed by 2018. The cost for the entire project with its route network, which is about 62 miles long, is estimated at approximately 18 billion euros.
WIEHAG was not only responsible for the construction work, but also for the planning and structural analysis of the timber grid roof. The structural analysis of the structure, with a total of 1,414 glulam timber members as well as 111 steel pipes, was performed in RSTAB.
Structure
In its cross‑section, the roof structure of the station building can be described as a semi‑ellipse. The arc spans freely over a width of about 102 ft Coupled triangles form the mesh structure of the load‑bearing shell. With a regular grid of 19.6 ft, the timber structure is supported at the nodal points.
At both ends of the longitudinal sides, the roof cantilevers a spectacular 98.4 ft over the water surface. There, round steel pipes running parallel to the diagonal timber beams form the end of the roof. These so-called end ring beams are double curved and have an architectural function in addition to strengthening the structure.
One major engineering challenge was the design of the nodal points consisting of steel. They were represented and calculated as finite element models in RFEM.
The structural steel parts had to be made with a high degree of accuracy in order to keep the tolerance compensation as low as possible at the construction site.
The roof covering consists of membrane cushions. In the central area, however, the roof is open to facilitate the natural watering of a park created inside.
The Crossrail station in Canary Wharf is one of the largest timber construction projects in Great Britain. With this building, London receives another architectural highlight.
Keywords
Timber Structure Timber Construction Glued laminated timber Wood Building Wood Structure
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