Metal Building Roof Purlins

They give added support to the roof and also provide a nailing surface for the end panels and drip edge.

Metal building roof purlins.

Girts and purlins are components of the secondary frame of a metal building. This panel is the same configuration as r panel with the exception of a longer leg on one side of the panel that bears down on the roof purlin. Thirdly purlins add additional support between the spans of the individual framing bays. Metal building purlin spacing.

Metal roof purlins are installed horizontally under metal roofs. Girts and purlins may also be called sheeting rails. The shape of cee purlins does not allow end lapping they are butted together. Used for roof and walls on metal buildings.

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. First the purlins support the roof. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. Metal building roof purlins provide three structural functions.

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. Purlins are 2 by 4 feet and are installed much like metal roofing. A girt is a horizontal structural member in a framed wall that provides lateral support to the wall panel to resist wind loads. Engineered purlin metal mart offers a complete line of engineered purlin material.

Hints the name pb for purlin bearing. Metal roofs are often referred as tin roofs in the past because of the use of tin such as aluminum or stainless steel sheets as the materials. Purlins perform the same service for the roof panels. Compared to conventional roofing system it might be a bit pricier in terms of installation but also has longer durability to provide better value for the future.