Purlins Roof Support

Cee purlins are secondary steel framing members used for roof and wall support as well as a header sill brace and more.

Purlins roof support.

Once your purlins have been fitted and a supporting framework has been created you should look to carry out an inspection before you continue work. Purlins are 2 by 4 feet and are installed much like metal roofing. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. They give added support to the roof and also provide a nailing surface for the end panels and drip edge.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. With rafters it runs in perpendicular from the walls to the ridge while with purlins it runs to the ridge in parallel. Using a combination of rafters and purlins is common. Purlins support the loads from the roof deck or sheathing and are supported by the principal rafters and or the building walls steel beams etc.

The support system for the roof is comprised of ridgepole and rafters or purlins. Purlins are 2 by 4 feet and are installed much like metal roofing. How to support roof purlins purlins can be fixed to rafters and all joins and laps should be supported by a rafter. Purlins are installed horizontally under metal roofs.