Purlin Roof Framing Diagram

Also referred to as secondary structurals this type of framing runs in between primary framing elements creating a structure within a structure much like cross beams in a wooden building.

Purlin roof framing diagram.

This article and series of illustrated diagrams shows you all the parts of a basic roof truss king truss and queen truss. In traditional timber framing there are three basic types of purlin. For a sloped roof the components of the gravity load are divided into a normal. About the base of the purlin based on the free body diagram shown in figure 3.

The roof truss structure and design is integral to roof structural integrity and shape. Component w sinθ in the plane of the sheathing. In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof. In architecture structural engineering or building a purlin or historically purline purloyne purling perling is any longitudinal horizontal structural member in a roof except a type of framing with what is called a crown plate.

Component w cosθ perpendicular to the plane of the sheathing and a downslope. Purlin plate principal purlin and common purlin.