Purlins For Steel Roof

For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.

Purlins for steel roof.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Do all roofing projects require purlins. Purlins are 2 by 4 feet and are installed much like metal roofing. We do recommend it however.

For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Purlins are an important component in a pre engineered steel structural kit. 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.

The purpose of purlins. If you want to know how to support roof purlins they are usually supported by 2 4 or 2 6 struts or posts. These structural supports run perpendicular across the rafter beams. Step 1 run a tape measure from end to end along the rafters of the roof to determine how many purlins will be needed for installation.

The standard of purlin length will vary anywhere between 100 to 300 mm while the thickness will vary anywhere between 1 to 3 mm. The shape of cee purlins does not allow end lapping they are butted together. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot.

Also known as sheeting rails purlins create the roofing members of the secondary framing of a steel building. Purlins are installed horizontally under metal roofs. For 2x4s purlins the posts are spaced in 4 feet distance. Purlins are 2 by 4 feet and are installed much like metal roofing.