Pro Rib Steel Roofing Purlin Spacing

Using screws fasten roof at top and bottom of the sheet in the flat next to each rib.

Pro rib steel roofing purlin spacing.

Fastener spacing may not exceed 1 1 2 38mm. Use 5 purlin spacing maximum install panels note. This option not recom mended for roofing a heated space with no insulation or vapor barrier. Keep metal roofing back 3 inches.

Secure the screws but do not overtighten. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. Place the first screw about 7 inches from the bottom and each subsequent screw about 18 to 24 inches apart along the vertical run. Premium pro rib steel panel substrate shall be.

For solid decking use 14 x 1 mp screws. The roof panels are installed similar to the wall panels in layout. At bottom of opening slit panels or. Since direct contact between pressure treated lumber and metal roofing must be avoided in order to prevent potential corrosion.

Nominal thickness of 0180 g 100 galvanized coating plus zinc phosphate per astm 653. 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. Without a set of blueprints with a pe s seal you have no option but to follow the inspectors gig. Purlin spacing is dependent on profile of the metal and gauge plus snow and wind load plus what the rafters are designed to carry.

All intermediate fasteners can be. Maximum purlin spacing for roof 5 on center option 1. Suggested line spacing is one foot beyond 3 panels wide or about 10 feet. Do all roofing projects require purlins.

Rib of roof panel with screws on every rib along both sides of rib. Install panels on solid decking install plywood deck. We do recommend it however. Lay down the first roof steel panel squaring it with the mason line.

Install emseal closure 3 inches back from metal. Grand rib 3 style metal roofing can be separated from the moisture barrier by minimum nominal 1 x3 yellow pine battens spaced on maximum 24 centers or according to asce calculations where applicable. For 2 x 4 purlins use 9 x 1 woodfast screws fastener spacing panel screws per lineal foot of roofing 12 4 5 18 3 0. Fyi we run purlins on 3 5 feet on center depending on size of purlin.

Install the roofing screws vertically along each rib in the panel. Install panels direct ly to wooden framing. The washer under the screw head should seal to the surface of the panel without bulging or shifting. Cut the first rib off leaving of rib on the first roof sheet of roof steel.

403 279 2766 skylight chimney cut opening in roof panel.