Because the stadium was the first of its kind in the world, the architects and engineers kept the design simple (by using a sturdy dome shape) and used proven technologies to move the roof. It was important the design would work and be reliable as to avoid the various problems that plagued Montreal's Olympic Stadium. The 31-storey-high roof consists of four panels: one (on the north end) is fixed in place and the other three are moved by electrically driven 'train' engines, that run on high-strength railway rails. The roof, which takes 20 minutes to open, was made out of steel trusses covered by corrugated steel cladding, which in turn is covered by a single-ply PVC membrane.
Because the stadium was the first of its kind in the world, the architects and engineers kept the design simple (by using a sturdy dome shape) and used proven technologies to move the roof. It was important the design would work and be reliable as to avoid the various problems that plagued Montreal'.s Olympic Stadium. The 31-storey-high roof consists of four panels: one (on the north end) is fixed in place and the other three are moved by electrically driven 'train' engines, that run on high-strength railway rails The roof, which takes 20 minutes to open, was made out of steel trusses covered by corrugated steel cladding, which in turn is covered by a single-ply PVC membrane.