Purlin Spacing For Metal Roofing

In some cases however the exact spacing of the rafters doesn t matter if the roof has other means of supporting the metal panels.

Purlin spacing for metal roofing.

Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. The width of metal panels will determine the rafter spacing. We do recommend it however. An engineer will use a load chart in order to determine the spacing between metal purlins.

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. In structural steel or aluminum construction p urlins usually w shapes or channels transfer roof loads to the major structural elements supporting the roof. The wider the roofing panels the greater spacing distance you should put. The metal roof purlins spacing must be done correctly within narrow tolerances.

The building was built 24 on center. Do all roofing projects require purlins. The type and spacing of purlins is a design consideration which depends upon the incident roof loads as well as the limiting lengths of sheeting to be used. Panel basics corrugated metal panels often called tin because in the past such panels were sometimes made of tin are typically steel or aluminum sheets that are used as a roofing material.

Screw line spacing for metal roofing over metal purlins. Purlin spacing for metal roofing the country inspector upon approving the plans seems to have written in per manufacturers specs regarding 2x4 purlins on 16 centers. Installing wood stripping under a tin roof. Engineered purlin metal mart offers a complete line of engineered purlin material.

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. This will depend upon the type of panel that is used and the thickness of the steel. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. There is a chance of damaging roofing sheets if you are failed to do so.