Purlin Roof Framing Diagram

In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof.

Purlin roof framing diagram.

For a sloped roof the components of the gravity load are divided into a normal. Component w cosθ perpendicular to the plane of the sheathing and a downslope. About the base of the purlin based on the free body diagram shown in figure 3. This article and series of illustrated diagrams shows you all the parts of a basic roof truss king truss and queen truss.

Purlin plate principal purlin and common purlin. The roof truss structure and design is integral to roof structural integrity and shape. Component w sinθ in the plane of the sheathing. In traditional timber framing there are three basic types of purlin.

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. 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.