There are many types of roof trusses as wall as many types of roofs more types than there are parts.
Purlin roof framing diagram.
In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof.
In traditional timber framing there are three basic types of purlin.
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.
Component w sinθ in the plane of the sheathing.
This article and series of illustrated diagrams shows you all the parts of a basic roof truss king truss and queen truss.
Secondary framing is an important component of many pre engineered metal buildings.
Component w cosθ perpendicular to the plane of the sheathing and a downslope.
The roof truss structure and design is integral to roof structural integrity and shape.
Purlin plate principal purlin and common purlin.