Purlin Size For Metal Roofing

The standard of purlin length will vary anywhere between 100 to 300 mm while the thickness will vary anywhere between 1 to 3 mm.

Purlin size for metal roofing.

If you want to know how to support roof purlins they are usually supported by 2 4 or 2 6 struts or posts. Lighter gauge panels like 22 24 and 26 gauge sheeting will remain more structurally sound for years to come. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. 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.

Twist is measured with the zee laying on a flat surface under its own weight. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap.

Net variation for combned dimension. Available in red oxide or galvanized cee purlins are cut to the nearest 1 8. 22 24 26 29. Metal roofing gauge sizes.

Cee purlins are secondary steel framing members used for roof and wall support as well as a header sill brace and more. For 2x4s purlins the posts are spaced in 4 feet distance.