Steel Roof Purlins Design

Purlins are 2 by 4 feet and are installed much like metal roofing.

Steel roof purlins design.

Steel roof purlins and wall girts are produced and available in house. Do all roofing projects require purlins. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. 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.

Cold formed box beams are typically used as a replacement for the eave strut eave purlin or strong back eave beam. The height of the box beam matches the purlin depth. Cleated or bracketed fixing only no flange bolting. Cpe 0 9 and cpi 0 2.

These structural supports run perpendicular across the rafter beams. 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. The shape of cee purlins does not allow end lapping they are butted together. Purlins are 2 by 4 feet and are installed much like metal roofing.

The depth of the box beam will be 8 10 or 12 depending on the design requirements of a particular project. Safe roof purlins spans. Roof purlin are members used to directly support roof sheeting materials and could be made of timber or steel. Metal roof purlins are installed horizontally under metal roofs.

They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. In timber construction purlins are nailed to the rafter or supporting trusses while in steel roof construction they are welded or bolted to the rafters or trusses by the means of cleats. Contact flexospan for information on custom purlin and girt structural steel dimensions. Max roof span allowed 12m.

Metal building roof purlins provide three structural functions. We do recommend it however. Purlins are installed horizontally under metal roofs. Purlins are an important component in a pre engineered steel structural kit.

All spans to have 1 row of bridging. We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge. Cee purlins are secondary steel framing members most commonly used as roof purlins wall girts and header jamb and sill for windows and doors on metal buildings. Steel z purlins and z girts are also available with other depths and flange widths.

The purpose of purlins. They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Welded together they can be used as columns braces and ties. Also known as sheeting rails purlins create the roofing members of the secondary framing of a steel building.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. High pressure zones kl 1 5 and 2 0 included.