Rafter Spacing For Metal Barn Roof

When decking is present the metal panels can be attached directly to the decking and the spacing of the rafters is not critical.

Rafter spacing for metal barn roof.

25 thoughts on pole barn truss spacing donald brinegar june 24 2011 at 11 58 am. Pre welded purlin cups predrilled bolt holes and included mounting hardware for fast easy installation. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. For light load roofs 24 o c.

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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. 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. For heavy loads 2x4s can span up to 5.

Steel trusses offer increased strength faster installation and a longer life compared to wood frame pole barn trusses. Rafter and roof joist spacing is only one part of a complex roof design that works together to form a structure that meets building codes and can hold up the weight of the roof and roof load. These are typically spaced at certain intervals to provide the necessary support for the roof. Builders aren t bound by standard rafter spacing measurements.

2 4 rafters can span up to 7. 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. 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.

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. The support system for the roof is comprised of ridgepole and rafters or purlins. But they do tend to space rafters in one of several industry standard increments typically. It came with a 24 x 36 pole barn with a corrugated steel roof and a thick plastic insulation blanket on the underside of the metal at ceiling.

Spacing your 2 4 shed rafters at 24 on center limits the width of your roof.