What is the role of the bottom chord in a truss?

The bottom chord of a truss serves as the lower horizontal member, providing structural support and contributing to the overall stability of the truss system. It helps to distribute loads from the roof down to the walls or supporting structures below, playing a crucial role in maintaining the shape and integrity of the truss under various load conditions.

Understanding this function is essential in roofing practices because proper truss design and the role of each component are vital for ensuring safety and durability in construction. The bottom chord works in conjunction with the top chord and the web members, creating a triangulated system that efficiently handles loads and resists deformation.