What is the function of the webs in a truss?

The webs in a truss serve a crucial role in the structural integrity and load distribution of the truss system. Their primary function is to connect the top chords and bottom chords, which are the primary load-bearing elements. Depending on the nature of the loads applied to the truss, the webs can experience both tension and compression.

When a load is applied to the truss, it causes deformation, and the webs act to distribute these forces between the chords. The areas of tension occur when the truss is subjected to bending, where some segments will be pulled apart. Conversely, compression occurs in segments where the load compresses the structure. This ability to serve dual roles of tension and compression is what allows trusses to effectively support the loads they encounter while maintaining stability.

Understanding the mechanics of a truss and the roles played by different components is essential for any home inspector, as it enables the identification of potential structural issues and the overall effectiveness of load-bearing structures in buildings.