Roof Framing Definitions

Some of these can support the roof and prevent ridge sagging and wall spreading.

Roof framing definitions.

Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist. In this section we ll cover the most. Most roofs utilize 16 inch spacings for strength and rigidity. Quite common until the 1920 s the function of a roof truss is to support the purlins.

Stick framing combines roof rafters with ceiling joists. Sometimes found in very large buildings where big rooms resulted in few load bearing walls. Parallel framing member installed horizontally to support floor and ceiling loads. With wood shingles or shakes this is the thicker end.

The exposed end of a shingle. Types of roofs and define common roof framing terms. The butt of a shingle is the end that faces down roof. In profile the framing of a conventional pitched roof forms a triangle.

Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center. More recently a roof truss means a prefabricated structural timber framework delivered to site to form part of a roof. Collar ties rafter ties tension beams structural ridge beams. Roofs must also be strong enough to withstand high winds.

The primary object of a roof in any climate is protection from the elements. A beam placed perpendicular to wall suds above doors windows or other openings to carry the weight of structural loads.