What type of truss is specifically used to support a sloping roof?

A pitched chord truss is designed to support sloping roofs effectively. This type of truss features sloped top chords that mirror the angle of the roof, providing adequate support and distributing loads evenly across the structure. The design of a pitched chord truss creates a triangular shape, which is structurally beneficial, as triangles are inherently stable and can handle forces well, especially those from wind and snow. This unique construction allows for an efficient transfer of loads down to the building's walls and foundation.

In contrast, the other types of trusses mentioned are not specifically tailored for sloped roofs. A bowstring truss, while it features a curved top chord that can create an arching support, is typically used for longer spans like warehouses or gymnasiums rather than standard sloped roofs. A parallel chord truss has flat top and bottom chords, making it suited for floors or flat roofs, while flat trusses are generally used where roofing needs are horizontal without any slope involved. Therefore, the pitched chord truss is the most suitable and commonly used option for sloping roofs.