Purlin Roof Framing Diagram

There are many types of roof trusses as wall as many types of roofs more types than there are parts.

Purlin roof framing diagram.

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. The roof truss structure and design is integral to roof structural integrity and shape. Secondary framing is an important component of many pre engineered metal buildings.

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. In traditional timber framing there are three basic types of 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. This article and series of illustrated diagrams shows you all the parts of a basic roof truss king truss and queen truss.

In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof. For a sloped roof the components of the gravity load are divided into a normal.