Trusses are generally used as roofs structures of large span buildings and also in bridges, towers, cranes and walkways. They have higher load capacity and more efficiently used cross-sections.

What are trusses used for in construction?

A truss gives a stable form capable of supporting considerable external load over a large span with the component parts stressed primarily in axial tension or compression. The individual pieces intersect at truss joints, or panel points.

Why are roof trusses used?

A truss is a triangular structure integrated into a roof to support a load. Aside from lending support and strength to a roof's frame, they also bridge the space above rooms.