The Capella clear span truss is a tried, tested and proven solution to achieving clear span options up to 30 metres, where no direct loading is acceptable on the existing flat roof. The system utilises the Ward multibeam purlin and channel sections, which are factory precision punched and bolted on site for a quick and simple assembly. The Capella fully supported truss can offer savings over the clear span truss system, when there is no need to avoid load onto the existing flat roof. The lightweight components can be roof or ground assembled and is easily manually lifted into position without disruption to building or occupants.