Roof Framing Definitions

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

Roof framing definitions.

Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist. Parallel framing member installed horizontally to support floor and ceiling loads. The exposed end of a shingle. A beam placed perpendicular to wall suds above doors windows or other openings to carry the weight of structural loads.

In profile the framing of a conventional pitched roof forms a triangle. More recently a roof truss means a prefabricated structural timber framework delivered to site to form part of a roof. Stick framing combines roof rafters with ceiling joists. Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs.

Most roofs utilize 16 inch spacings for strength and rigidity. In this section we ll cover the most. Roof slope and rigidness are for shedding water and bearing any extra additional weight. The primary object of a roof in any climate is protection from the elements.

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 rafters are usually positioned directly above the wall studs. Types of roofs and define common roof framing terms.

Some of these can support the roof and prevent ridge sagging and wall spreading. Quite common until the 1920 s the function of a roof truss is to support the purlins.