With a flat roof, rafters are sometimes called roof joists. Beams are structural elements that are designed to carry vertical gravitational forces or horizontal loads. They are subject to bending ...

flat trusses for commercial buildings, and mono trusses for roof extensions. Roof rafters are a popular alternative to trusses. These wooden beams slope downward from the central ridge or hip of ...

Roof trusses may use designs that are categorized as attic, bowstring, double fink, double howe, dual pitch, fan, fink, flat, hip, howe, inverted, sloping flat, stub and studio. The attic truss forms ...