In roofing terminology, which member serves as the common rafter?

The common rafter is actually defined as the sloping beam that extends from the ridge of a roof down to the eaves, which forms the basic framework of a sloped roof. It's important to distinguish this from other members of a roof structure.

The top chord, while it is a structural member, typically refers to the uppermost component of a truss. It serves as part of the truss system rather than functioning as a standalone rafter on its own. The bottom chord relates to the lower part of a truss and is also not synonymous with the common rafter; it serves a different role altogether. Meanwhile, a hip rafter is specifically used for roofs with a hip design, which incorporates angles rather than a straight slope.

In the hierarchy of roofing terminology, the common rafter provides essential support and defines the shape of the roof, making it a critical component in residential and light commercial roofing applications. Understanding these distinctions is crucial for anyone studying building basics, as proper identification and terminology are fundamental to effective communication and comprehension in construction contexts.