How Thick Is Roof Decking

If the plywood thickness is less than or the osb less than 7 16 it is going to be weak with the roof rafters spaced the standard 2 on center.

How thick is roof decking. The cabin is just 440 sf and is in zone 6. The typical thickness range for sheathing is 3 8 to 3 4 inch. However you may need to consider bolstering the plywood thickness for a roof that has a higher load. All roof decking may also be available in aluminum or stainless steel please call ahead for availability.

This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load. In this case plywood should be a minimum of 3 8 inch thick. Is 1 2 osb okay for a standing seam roof and other roofing materials or is 5 8 preferred. Ans steel is a stocking distributor of steel roof decking in the sizes listed below.

That s considered to be the minimum. Flexural strength can be assumed to be 33ksi unless a new single ply system is contemplated that requires a higher pull out strength. My cabin trusses will be 24 oc and i will use either 1 2 or 5 8 osb sheathing and a standing seam metal roof. 8d ring shank nails should be used instead.

Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. 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. In the first half of the 20th century roofs in missouri were built with wood shingles over planks spaced about 1 apart. 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.

Can someone direct me to blogs or q a titles that address roof sheathing thickness. In that case a pullout test device can confirm adequacy. An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof. Standard roof sheathing which consists of 4 by 8 sheets of plywood or oriented strand board or osb is 1 2 inch thick and attaches directly to the roof rafters or the roof trusses.

Thickness of a steel roof deck can be determined at a roof hatch where the edge of the deck may be available for measurement with a micrometer. Was used as a roof deck before plywood. Sheathing should be a minimum of 19 32 inch thick. Post frames generally lack structural sheathing so the roof and wall panels must span between the supporting trusses or purlins.

A roof that lays practically flat will have a much heavier load than a steeper roof that allows rain snow and ice to roll right off.