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.

For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. Lighter gauge panels like 22 24 and 26 gauge sheeting will remain more structurally sound for years to come. Metal roofing gauge sizes. For 2x4s purlins the posts are spaced in 4 feet distance.

The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. We do recommend it however. 22 24 26 29.

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. If you want to know how to support roof purlins they are usually supported by 2 4 or 2 6 struts or posts. Net variation for combned dimension. Do all roofing projects require purlins.

Twist is measured with the zee laying on a flat surface under its own weight. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.