Roof Framing Definitions

Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist.

Roof framing definitions.

Roofs must also be strong enough to withstand high winds. 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 this section we ll cover the most.

Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs. Parallel framing member installed horizontally to support floor and ceiling loads. Stick framing combines roof rafters with ceiling joists. A beam placed perpendicular to wall suds above doors windows or other openings to carry the weight of structural loads.

With wood shingles or shakes this is the thicker end. In profile the framing of a conventional pitched roof forms a triangle. The exposed end of a shingle. 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. Collar ties rafter ties tension beams structural ridge beams. Quite common until the 1920 s the function of a roof truss is to support the purlins. The butt of a shingle is the end that faces down roof.

Most roofs utilize 16 inch spacings for strength and rigidity. Some of these can support the roof and prevent ridge sagging and wall spreading.