Roof Framing Definitions

The butt of a shingle is the end that faces down roof.

Roof framing definitions.

Some of these can support the roof and prevent ridge sagging and wall spreading. Parallel framing member installed horizontally to support floor and ceiling loads. Collar ties rafter ties tension beams structural ridge beams. The primary object of a roof in any climate is protection from the elements.

Roofs must also be strong enough to withstand high winds. In this section we ll cover the most. Roof slope and rigidness are for shedding water and bearing any extra additional weight. Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist.

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

With wood shingles or shakes this is the thicker end. The exposed end of a shingle. Quite common until the 1920 s the function of a roof truss is to support the purlins. Sometimes found in very large buildings where big rooms resulted in few load bearing walls.

More recently a roof truss means a prefabricated structural timber framework delivered to site to form part of a roof. In profile the framing of a conventional pitched roof forms a triangle.