Roof Purlin Types

The inspector asked about the type of wood being used as purlins.

Roof purlin types.

They both can be combined well to make sure that the space below the roof. I did not know. All about purlin span for metal roof. 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.

He gave me a copy of r802 5 1 3 rafter spans for common lumber species. The type and spacing of purlins is a design consideration which depends upon the incident roof loads as well as the limiting lengths of sheeting to be used. Rectangular hollow section rhs is a type of purlin often used in roofs where the support structure will be visible when construction is complete. One of my questions was about snow loads.

It is suitable to use for roof sheeting from fiber cement. In architecture structural engineering or building a purlin is any longitudinal horizontal structural member in a roof except a type of framing with what is called a crown plate. I explained the layout of roof trusses and purlins on your building design. As the bar is hollow caps are welded to the ends of the purlin to keep moisture from getting inside and corroding the metal.

The table shows one 2 x 8 that will make a 15ft. Secondary framing is an important component of many pre engineered metal buildings. In traditional timber framing there are three basic types of purlin.