Pro Rib Steel Roofing Purlin Spacing

Roof sheathing consists of premium pro rib steel panels attached to the top edge of roof purlins in accordance with manufacturer s specifications or as shown on design drawings.

Pro rib steel roofing purlin spacing.

Steel roofing can be costly but it is a lifetime investment. Install panels on solid decking install plywood deck. Figure 7 screws should be placed on both sides of the ribs at both eave and ridge. Walking or standing on a metal roof which does not have a plywood or other deck beneath it is not recommended.

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. For panel lap details see figure 5 on page 4. 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 24 2 5. Pdf 27 kb menu.

Nominal thickness of 0180 g 100 galvanized coating plus zinc phosphate per astm 653. Maximum purlin spacing for roof 5 on center option 1. Pdf 2 mb premium pro snap snow bar clip installation. Keep metal roofing back 3 inches.

Pdf 31 kb ul 529 pro snap roof construction. Use 5 purlin spacing maximum install panels note. Pdf 2 mb chimney flashing instructions. Galvanized steel which is created by using a soft layer of zinc to protect the inner layers is the most common type of steel roofing.

Purlin spacing is dependent on profile of the metal and gauge plus snow and wind load plus what the rafters are designed to carry. Fastener spacing may not exceed 1 1 2 38mm. Purlin spacing must be uniform and carefully measured. Premium pro rib steel panel substrate shall be.

The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. Do all roofing projects require purlins. Crown of the rib to secure the side lap. We do recommend it however.

Without a set of blueprints with a pe s seal you have no option but to follow the inspectors gig. Noise is usually not a factor if you are installing a steel roof over asphalt. Pdf 780 kb premium pro steel gutter systems installation. Install panels direct ly to wooden framing.

Grand rib 3 style metal roofing can be separated from the moisture barrier by minimum nominal 1 x3 yellow pine battens spaced on maximum. At bottom of opening slit panels or. This option not recom mended for roofing a heated space with no insulation or vapor barrier. Rib of roof panel with screws on every rib along both sides of rib.

5 rib metal roofing system ordering installation guide. Pdf 779 kb ul 560 pro rib roof construction. 2 1 3 4 5 figure 5 p install metal directly to wood metal frame use maximum 2 purlin spacing install metal do not use this option for heated spaces install metal on solid deck. Install emseal closure 3 inches back from metal.