Steel Roof Purlins Design

The shape of cee purlins does not allow end lapping they are butted together.

Steel roof purlins design.

We do recommend it however. Metal building roof purlins provide three structural functions. The purpose of purlins. Roof purlin are members used to directly support roof sheeting materials and could be made of timber or steel.

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. Steel z purlins and z girts are also available with other depths and flange widths. Steel roof purlins and wall girts are produced and available in house. Do all roofing projects require purlins.

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. Purlins are 2 by 4 feet and are installed much like metal roofing. Also known as sheeting rails purlins create the roofing members of the secondary framing of a steel building. The height of the box beam matches the purlin depth.

The depth of the box beam will be 8 10 or 12 depending on the design requirements of a particular project. Cpe 0 9 and cpi 0 2. Purlins are installed horizontally under metal roofs. Cleated or bracketed fixing only no flange bolting.

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. Welded together they can be used as columns braces and ties. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.

Max roof span allowed 12m. Cold formed box beams are typically used as a replacement for the eave strut eave purlin or strong back eave beam. Engineered purlin metal mart offers a complete line of engineered purlin material. They give added support to the roof and also provide a nailing surface for the end panels and drip edge.

We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge. Safe roof purlins spans. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. These structural supports run perpendicular across the rafter beams.

Metal roof purlins are installed horizontally under metal roofs. 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 the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. Contact flexospan for information on custom purlin and girt structural steel dimensions.

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. High pressure zones kl 1 5 and 2 0 included.