Purlins Roof Support

Using a combination of rafters and purlins is common.

Purlins roof support.

Available in red oxide or galvanized cee purlins are available cut to length. Purlins are 2 by 4 feet and are installed much like metal roofing. They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Purlins are installed horizontally under metal roofs.

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 support the loads from the roof deck or sheathing and are supported by the principal rafters and or the building walls steel beams etc. Cee purlins are secondary steel framing members used for roof and wall support as well as a header sill brace and more. With rafters it runs in perpendicular from the walls to the ridge while with purlins it runs to the ridge in parallel.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Purlins are 2 by 4 feet and are installed much like metal roofing. Step 1 run a tape measure from end to end along the rafters of the roof to determine how many purlins will be needed for installation. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.