Minimum Sheathing Thickness Roof

You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness.

Minimum sheathing thickness roof.

And for wood structural panel sheathing r803 2 2 allowable spans. Sheathing should be a minimum of 19 32 inch thick. 1 inch 25 4 mm. 8d ring shank nails should be used instead.

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Building codes for roofing reqiure a minimum 1x4 and the spaces between battens should not exceed 3 1 2 inches figure 2 46 wood shingles over spaced sheathing and figure 2 47 wood shakes installed over wood sheathing are illustrated below. This way no worrying about grabbing scraps to fill in small spots and not having the correct thickness. Osb roof decking thickness 7 16 1 2 or 5 8 if were using osb we get 9 16 we dont worry about getting both 7 16 and 9 16 for walls then the roof we just get all of the same.

Because 22 24 or 26 gauge sheeting is thicker and will therefore remain more structurally sound over a longer span than a 29 gauge the building needs fewer supports which saves your customers money. 140 wind speed mph 150 mph 160 mph minimum sheathing thickness inches exposure b 7 16 24 16 15 32 32 16 19 32 40 20 minimum sheathing. According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing. Post frames generally lack structural sheathing so the roof and wall panels must span between the supporting trusses or purlins.

The typical thickness range for sheathing is 3 8 to 3 4 inch. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the. Many code requirements are not inspected.

Minimum roof sheathing thickness excerpt roof sheathing thickness rafter truss spacing 24 in.