Rafter Spacing For Metal Barn Roof

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 barn roof.

The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. Builders aren t bound by standard rafter spacing measurements. When decking is present the metal panels can be attached directly to the decking and the spacing of the rafters is not critical. Truss spacing for metal roof our neighbor just put up a pole barn w metal roof industrial grade thicker than the residential stuff used here his trusses are about 10 foot centers but he has hangered 2x6 on two foot centers between them.

For heavy loads 2x4s can span up to 5. These are typically spaced at certain intervals to provide the necessary support for the roof. It is to hot in the summer and to cold in the winter to enjoy conveting it into a mancave. 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.

Designing roof trusses for proper placement on post frame buildings. While decking is not required for a metal roof and is often not used for shops barns or other outbuildings if a metal roof is being put onto a home or a garage the use of decking is common. 25 thoughts on pole barn truss spacing donald brinegar june 24 2011 at 11 58 am. 2 4 rafters can span up to 7.

But they do tend to space rafters in one of several industry standard increments typically. For light load roofs 24 o c. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.

A roof truss is a structural framework usually made from wood that bridges the space between the ceiling of the top level and the roof structure. Steel trusses offer increased strength faster installation and a longer life compared to wood frame pole barn trusses. The support system for the roof is comprised of ridgepole and rafters or purlins. 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.

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.