Macalloy Tie Bars in Lightweight Tensioned Steel Roof in Czech Republic
Year of Completion 2004
Macalloy tie bars are used to tension the lightweight steel truss roof structure at the O2 arena in Czech Republic.
After the initial design stage the roof had to undergo a re-design as part of cost saving measures. The original thick section steel truss roof was re-designed to a thinner section steel truss roof, tensioned with Macalloy tie rods around a central wheel. This saved around 400 tonnes of materials and reduced the roof weight by about 30%. This re-design and other cost savings allowed the project to go ahead.
The 18,000 seater arena has a roof span of 135 metres.