Roof Purlin Material

Do all roofing projects require purlins.

Roof purlin material.

The purpose of purlins. The roof deck is the wood panel ply board or metal sheeting that creates the surface of the roof. All about purlin span for metal roof. Purlins are an important component in a pre engineered steel structural kit.

Also known as sheeting rails purlins create the roofing members of the secondary framing of a steel building. It is suitable to use for roof sheeting from fiber cement. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.

Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern. Available in cee or zee shape red oxide primed or galvanized 16 14 or 12 gauge sizes from 4 up to 12 flange widths of 1 1 2 up to 4 cut to your specified lengths hole punching available load tables available for all material. When made of wood it is usually covered with some sort of weatherproofing and sometimes an insulation material. Engineered purlin metal mart offers a complete line of engineered purlin material.

The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. They both can be combined well to make sure that the space below the roof. Several kinds of purlins exist.