Flat Roof Steel Purlins

With the slope of the roof the live load can be reduced using the cosine of the roof slope 0 949 to get the applied load of 18 98 psf.

Flat roof steel purlins.

Do all roofing projects require purlins. Purlins are 2 by 4 feet and are installed much like metal roofing. To the good folks in michigan the only way to construct a pole building is to place the columns every eight feet. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.

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. Metal roofing siding and more. The metspec purlin design software will quickly determine the purlin section and bracing requirements for any application. The purlins have to be able to support their own weight of about 0 5 psf pounds per square foot plus the steel 0 63 psf.

Purlins are installed horizontally under metal roofs. As the roof live load of 20 psf is being carried by members 24 o c. In post frame construction roof purlins are the members running the lengthwise direction of the building either placed on top of or between the roof trusses or rafters to attach the roof steel or other roof sheathing to. They give added support to the roof and also provide a nailing surface for the end panels and drip edge.

For roof pitches greater than 25 the purlins are designed for the downslope roof loads. The purlin are ultimately used to fasten the roof steel providing a diaphragm effect along with the siding when properly engineered and installed. Purlins are dimensional lumber that are fastened to the top chord of trusses connecting them together for bracing purposes. We are a manufacturer of metal roofing wall panels corrugated roofing and corrugated siding structural products steel deck self storage buildings and pre engineered buildings.

The sheeting and fixings are deemed adequate in carrying the component of load in the plane of the roof slope on pitches up to 25. 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. Metal roof purlins are installed horizontally under metal roofs.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. 6 14 gauge purlins receiver channel 26 gauge commodity roof panels does not include trim package b. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. Max rib panels mega rib panels multi v panels multi cor panels r panels flat sheet metal meridian roofing meridian panels mcp panels cool roofing energy efficient roofing standing seam roofing easy bolt prefabricated steel.