Roof System No Purlins

For new construction florida building code does not require the use of a purlin system and some profiles like our tcm loc panel does not require use of purlins.

Roof system no purlins.

A common arrangement is a rafter and purlin system which combines purlins and rafters. Modern metal roofs are expected to last 30 years or longer. Purlins traditionally support the roof deck cladding sheeting and are in turn supported by the principal rafters steel beams etc. Do all roofing projects require purlins.

We do recommend it however. In the past the majority of roof structures were of wooden construction but over the past 15 to 20 years there has been a vast shift away from wood to metal mainly steel roof construction. The spacing of purlins on roofs and girts on wall is usually 4 to 6 ft. I am getting two different stories from contractors regarding purlins v s.

Standard gage are generally used for roofing. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. They are made from 16 ga 0 060 min 50 ksi structural grade g 90 galvanized steel and specifically notched to fit over the ribs of the existing metal roof panels. I have the option of installing the new roof directly to the existing deck or installing new decking if need be or installing 1x4 purlins 2 ft.

Roof hugger retrofit sub purlins are zee shaped structural members that are typically 10 to 12 feet in length. While metal roofing doesn t require plywood underlayment there are circumstances in which you may wish to install plywood to anticipate future roofing needs or to offer additional soundproofing. Numbers 20 and 22 u s.