![]() ![]() ![]() (basically take a hole saw, saw in about 1/2 inch, and put about a 7/8 inch long section of pipe/like in that hole saw cut). Learn how to set rafters for a tin roof based on the width of the metal panels. ![]() Not saying your not pushing the modern limits of construction, but if you have enough 2圆's one could double up a few one on each side of the existing rafter, or as far as shear, if your concerned, could consider a split ring type of attachment, A 24-inch OC rafter spacing is often suitable for metal roofs, as long as the roof design and local building codes permit. This may sound a little complicated, so let’s break down what impacts the span when it comes to roof rafters. 1-grade southern pine lumber on a roof with a 3/12 slope or less with a maximum live load of 20 pounds per square foot and a dead load of 15 psf. This may sound a little complicated, so let’s break down what impacts the span when it comes to roof rafters. A 2×6 rafter can span 14 feet 8 inches when spaced 16 inches apart with No. Ill have to figure that one out when I buy my roofing panels. A 2×6 rafter can span 14 feet 8 inches when spaced 16 inches apart with No. A panel of 24 gauge steel will accommodate a much greater purlijn spacing than a panel of 29 gauge steel. I have buildings with 2x4 on 24 spanning 12 foot, slight sag after 90 years,Īnother building 2x4 24 on center spanning 10', no seeable sag, 70 years,īarn lean to sheds, 2圆 24 oc, 15 foot, span slight sag it is 105 years old, (all lumber is Douglas fir)Īll have approximately the same slope as your drawing, all of my buildings are 1x sheeted and have been shingled, with asphalt shingles, the barn is sheeted but tinned now, Metal roofing: Metal roofing materials are especially lightweight, allowing for wider rafter spacing. is adequate, but that really depends on the strength properties of the roof panel. ![]()
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