Roof Framing Definitions

Roof slope and rigidness are for shedding water and bearing any extra additional weight.

Roof framing definitions.

Parallel framing member installed horizontally to support floor and ceiling loads. With wood shingles or shakes this is the thicker end. Types of roofs and define common roof framing terms. Some of these can support the roof and prevent ridge sagging and wall spreading.

Sometimes found in very large buildings where big rooms resulted in few load bearing walls. The rafters are usually positioned directly above the wall studs. In profile the framing of a conventional pitched roof forms a triangle. Collar ties rafter ties tension beams structural ridge beams.

Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist. Most roofs utilize 16 inch spacings for strength and rigidity. The exposed end of a shingle. More recently a roof truss means a prefabricated structural timber framework delivered to site to form part of a roof.

Quite common until the 1920 s the function of a roof truss is to support the purlins. Roofs must also be strong enough to withstand high winds. Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center. The primary object of a roof in any climate is protection from the elements.

Stick framing combines roof rafters with ceiling joists. Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs.