The cable net roof of the Olympic Stadium has been lifted into place, it was announced today.
The cable net is formed between the outer white steel roof truss and an inner tension ring 30 m above the field of play.
More than 900 tonnes of scaffolding and 1 km of support platforms were used to assembled over 12,000 m of cables and the walkways.
It took four weeks and 56 hydraulic jacks to lift the 450 tonne structure into place.
The cable net roof will be covered with material next spring, providing the correct conditions for athletes on the field of play and covering two-thirds of spectators.
Olympic Delivery Authority chairman John Armitt said: “The successful lift of the stadium’s cable roof is another milestone reached on the construction of this flagship venue.
“It has been a complex engineering and construction challenge, complicated by the wind and rain in recent weeks. We remain firmly on track and will lift the lighting towers into place early next year, taking the stadium to its full height.”