Roof Framing Definitions

Roofs must also be strong enough to withstand high winds.

Roof framing definitions.

Quite common until the 1920 s the function of a roof truss is to support the purlins. The rafters are usually positioned directly above the wall studs. Most roofs utilize 16 inch spacings for strength and rigidity. In this section we ll cover the most.

Some of these can support the roof and prevent ridge sagging and wall spreading. The exposed end of a shingle. The butt of a shingle is the end that faces down roof. In profile the framing of a conventional pitched roof forms a triangle.

Sometimes found in very large buildings where big rooms resulted in few load bearing walls. Roof slope and rigidness are for shedding water and bearing any extra additional weight. With wood shingles or shakes this is the thicker end. Collar ties rafter ties tension beams structural ridge beams.

Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center. Stick framing combines roof rafters with ceiling joists. Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs. The primary object of a roof in any climate is protection from the elements.

Parallel framing member installed horizontally to support floor and ceiling loads. Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist.