Roof trusses are prefabricated structural frameworks designed to support the roof and distribute loads efficiently across exterior walls. They are engineered assemblies typically made from dimensional lumber connected using metal connector plates. Unlike traditional rafters, which are cut and assembled on-site, trusses are manufactured in controlled environments and delivered as complete units. This allows for greater precision, faster installation, and improved structural consistency. Trusses are designed using geometric configurations that distribute weight through triangular units, making them highly efficient at handling loads such as roofing materials, snow accumulation, and wind pressure. They transfer these forces directly to the building’s load-bearing walls. One of the key advantages of roof trusses is their ability to span long distances without requiring interior load-bearing walls, allowing for open-concept interior designs. They also reduce construction time and labor costs. However, trusses are not easily modified after installation. Any structural changes require engineering approval, as altering a truss can compromise the integrity of the entire roof system.
