Purlin Roof Framing Diagram

In traditional timber framing there are three basic types of purlin.

Purlin roof framing diagram.

Secondary framing is an important component of many pre engineered metal buildings. There are many types of roof trusses as wall as many types of roofs more types than there are parts. Component w cosθ perpendicular to the plane of the sheathing and a downslope. In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof.

About the base of the purlin based on the free body diagram shown in figure 3. 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. Purlin plate principal purlin and common purlin. Purlins support the loads from the roof deck or sheathing and are supported by the principal rafters and or the building walls steel beams etc.

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. For a sloped roof the components of the gravity load are divided into a normal.