What component provides structural support in roof systems?

The truss serves as a key structural element in roof systems, providing the necessary support and stability to withstand various loads such as snow, wind, and the weight of roofing materials. A truss is essentially a framework, typically made of wood or metal, that is designed in a triangular shape. This shape is essential, as it helps evenly distribute weight and resist deformation, ensuring the roof maintains its integrity over time.

In a roof system, the truss connects the load from the roof to the walls of the structure, effectively transferring weight in a way that optimizes the building’s overall durability. By spanning large areas without needing continuous support, trusses allow for open spaces within buildings, which can be critical for certain architectural designs.

The other components mentioned, while important, play different roles. The bottom chord is just one part of a truss that helps in maintaining its shape and connection, while webbing refers to the internal members that provide additional support but do not function independently as structural supports. Gussets are typically used in conjunction with trusses to strengthen joints but don’t provide the overall structural support that trusses do. Thus, the truss is the primary component that gives structural support in roof systems, making it the correct answer.