Roof Framing Definitions

Quite common until the 1920 s the function of a roof truss is to support the purlins.

Roof framing definitions. 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. The butt of a shingle is the end that faces down roof. Most roofs utilize 16 inch spacings for strength and rigidity.

Parallel framing member installed horizontally to support floor and ceiling loads. Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center. Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs. The rafters are usually positioned directly above the wall studs.

Collar ties rafter ties tension beams structural ridge beams. 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. Types of roofs and define common roof framing terms.

The exposed end of a shingle. In this section we ll cover the most. The primary object of a roof in any climate is protection from the elements. With wood shingles or shakes this is the thicker end.

Roof slope and rigidness are for shedding water and bearing any extra additional weight. Roofs must also be strong enough to withstand high winds.