In architecture or structural engineering, a girt, also known as a sheeting rail, is a horizontal structural member in a framed wall. Girts provide lateral support to the wall panel, primarily, to resist wind loads. A comparable element in roof construction is a purlin.

What is the difference between girts and purlins?

Purlins are specific to the roof. In the shape of a “Z”, a purlin is a horizontal structural member that supports roof covering and carries loads to the primary frame. ... Also, in the shape of a “Z”, a girt is a horizontal structural member that is attached to sidewall or end wall columns and supports paneling.

What are girts on a pole barn?

Wall boards on a pole building are called girts. Girts are installed horizontally and attached to posts. This allows the load to be transferred to poles.