View source for Canning Town Flyover

{{#image_template:image=File:Canning_Town_Flyover.jpg|caption=''(Image courtesy of [http://www.tatasteelconstruction.com Tata Steel])''|align=right|wrap=true|width=500}}

Canning Town Flyover is a 330m long, 16-span viaduct carrying two tracks of the Docklands Light Railway (DLR) in East London. It provides grade separation of Canning Town Junction, connecting in the new extension to Stratford International, and improving journey times from Beckton / King George V to Bank / Tower Gateway.

The main span comprises a [[Half-through bridges|half through]] plate girder deck, 52m long, 12m wide with a [[Skew bridges#Angle of skew|skew angle]] of 46 degrees, [[Design for steel bridge construction#Fabricating the steelwork|fabricated]] from S355J2 and S355K2 steel to EN 10025-2<ref name="no1">BS EN 10025-2: 2004, Hot rolled products of structural steels, Part 2: Technical delivery conditions for non-alloy structural steels, BSI</ref>. The main girder depth varies from 2.6m at the supports to over 4.5m at midspan. A trial erection of the two main girders and transverse beams was carried out at Rowecord’s Newport works prior to site [[Design for steel bridge construction#Erection using cranes|erection]], which was completed within a single 50 hour [[Design for steel bridge construction#Erection during possessions|rail possession]] using a 600t capacity crawler crane.
	
An unusual feature of this deck is the structural continuity with the adjacent precast beam spans, which was needed to avoid a highly skewed [[Bridge articulation and bearing specification#Expansion joints|movement joint]] under the tracks. Such a joint would have resulted in unacceptable displacements of the permanent way under live loading. Continuity was achieved by connecting the two main steel girders to a substantial concrete diaphragm using post-tensioned bars. The precast beams of the adjacent deck are also cast into the diaphragm, and [[Bridge articulation and bearing specification#Bearings|bearings]] between the diaphragm and substructure provide the required [[Bridge articulation and bearing specification#Articulation|articulation]].

{|class="wikitable"  width=400
|-
|'''Structural engineer'''||Arup
|-
|'''Steelwork contractor'''||Rowecord Engineering Ltd.
|-
|'''Main contractor'''||Taylor Woodrow Construction
|-
|'''Client'''||Docklands Light Railway
|}

==References==

<references/>

[[Category:Case studies – Bridges]]