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Balfour Beatty has won the 拢41m job to reconfigure the roof of the Olympic stadium for its legacy use

The redeveloped roof design 鈥� drawn up by original stadium architect Populous - boasts a gravity-stressed structure spanning 84m and providing cover for football fans sitting above the existing running track once the stadium becomes the home of West Ham football club in 2016.

Balfour Beatty said the job would involve dismantling and removing the existing roof and floodlight towers, with an extensive cable net system then constructed to support the new roof, which will be built on the floor of stadium and then lifted into position.

Work is due to commence on site this autumn and is due for completion in the spring of 2015.  

The roof contract will eventually be transferred over to the successful bidder of the main conversion contract for the London 2012 Olympic Stadium, which is being procured under a separate contract. 

y client the London Legacy Development Corporation.

Balfour Beatty chief executive Andrew McNaughton, said: 鈥淭his award enables us to continue to develop our role in the London 2012 Olympic legacy. 

鈥淥ur utilisation of leading 好色先生TV Information Modelling techniques has allowed us to develop a bespoke construction methodology that will reduce the programme risk to this technically challenging scheme.

鈥淥nce complete, the stadium will provide a first-class sporting and cultural facility for many generations to come.鈥�

Work is due to commence on site this autumn and is due for completion in the spring of 2015.  

The roof contract will eventually be transferred over to the successful bidder of the main conversion contract for the London 2012 Olympic Stadium, which is being procured under a separate contract. 

five firms are in the running for the 拢100m job to convert the stadium into the home of West Ham football club.

Sir Robert McAlpine, which was the main contractor on the stadium, is up against Balfour Beatty,  ISG, Buckingham Group and Shepherd Construction for the main shell-and-core contract, which according to construction database Barbour ABI is worth 拢100m.

The main contractor role was first advertised last December with a winner to be chosen by the end of this year.

Mace has already been appointed as project and programme manager for the work while Buro Happold is structural engineer and the architect is Populous.

The overall value of the legacy work is estimated to be between 拢150m and 拢190m in total.