Based on the following passage, which of the following components is most responsible for keeping a building strong? A truss is a framework of dimensional lumber, light-gauge steel, or steel beams arranged in a manner to span the structure’s horizontal dimensions, distribute weight to the foundation, and provide a skeleton onto which the roof sheathing can be attached. On top of the truss structure is the roofing system, which is part of the building envelope—that is, the materials and structures that separate the interior of the building from the external world. Together, the truss and the roofing materials create a protective system that keeps the building strong, safe, and dry.

building envelope
truss
roofing system
roof sheathing