Roof Purlin Material

Do all roofing projects require purlins.

Roof purlin material.

Purlins are an important component in a pre engineered steel structural kit. 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. Engineered purlin metal mart offers a complete line of engineered purlin material. Several kinds of purlins exist.

For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. Also known as sheeting rails purlins create the roofing members of the secondary framing of a steel building. They both can be combined well to make sure that the space below the roof. When made of wood it is usually covered with some sort of weatherproofing and sometimes an insulation material.

The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. These structural supports run perpendicular across the rafter beams. 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.

The purlins of a roof support the weight of the roof deck. All about purlin span for metal roof. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.