Cable-stayed roof for state-of-the-art venue

Elegant geometry achieved with BBR VT CONA CME

The striking new roof of the Polish city of Płock’s newest venue – the Orien Arena – owes its elegant form to the technology and expertise of the BBR Network.

The cable-stayed roof has a huge 85 m span – and only with post-tensioning technology can such a large span be achieved. To create the iconic roof, we used a 22-strand BBR VT CONA CME system consisting of 40 tendons, each guided through HDPE pipes. Twenty one tendons are load-bearing and have a concave layout, while the other 19 serve to tighten the cable structure and have a convex layout.

The main advantage of cable-stayed roofs is that the tendons are the only structural elements – so the long span roof structure is very light. But a really key benefit is that, during construction, there is no need for temporary supports or scaffolding – the structure is only load-bearing after installation. In addition, the tendons are protected with HDPE pipes, to which it is very easy to attach different roofing systems.