Metal Roof Rafter Spacing

Twenty four inches is a common spacing of furring strips for a metal roof.

Metal roof rafter spacing.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. There is a chance of damaging roofing sheets if you are failed to do so. An syp 2 6 rafter at 24 o c.

Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. Wider panels allow for greater spacing between rafters. The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof.

The wider the roofing panels the greater spacing distance you should put. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. For instance 2 grade 2x4s at 16 on center will span just over 9.

These numbers are for roofs supporting light loads of 20 pounds for square foot. To determine how far apart to set rafters measure the width of the metal panel and then the width. Determine the location of a rafter by a vertical set of nails in the fascia board or by an exposed rafter tail. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

Rafter spacing for metal roof purlin hangers clips are available if you would rather the purlin be on the same level as the rafter rather than on top of the rafter. Rafter spacing is based on the width of the metal roofing panels. For standard shed roof rafter spacing see rafter span chart. An spf roof at the same spacing and lumber size will span 11.

That means it can span a total length of over 26 for a gable roof. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. Can span up to 13 4. The metal roof purlins spacing must be done correctly within narrow tolerances.