Pitched Roof Roof Structure Terminology

The pitch of a roof is its vertical rise divided by its horizontal span and is a measure of its steepness.

Pitched roof roof structure terminology.

2 1 duo pitched roof. The butt of a shingle is the end that faces down roof. The slope of a roof. A pitched roof is a roof that slopes downwards typically in two parts at an angle from a central ridge but sometimes in one part from one edge to another.

All four sides slope downwards and are all equal in length to form a ridge at the top of the roof. Often used in attics to add light and a pleasing design to the house. Angle a equals angle b. A roof that has two pitches on each slope.

A purlin normally supports the rafters where the two pitches on the same elevation meet. 2 4 truncated duo pitched roof. Collar tie also collar beam in profile the framing of a conventional pitched roof forms a triangle. Easily identified by their triangular shape gable roofs are generally two sided with a peak formed at the top hip.

This is the most common roof shape with equal pitches on either side i e. Part of roof construction. This truss form is often introduced into domestic housing in conjunction with the conventional duo pitched roof to form an interesting roof line. Angle f equals angle g.

A low wall that projects beyond the eves at the edge of a roof. Dormer window a vertical window or opening coming through a sloping roof and usually provided with its own pitched roof. Cupola a relatively small roofed structure generally set on the ridge or peak of a main roof area. A horizontal timber beam providing intermediate.

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