Roof Sheathing Thickness 16 Oc

8d ring shank nails should be used instead.

Roof sheathing thickness 16 oc.

That means it can be used at 24 in. For subfloors zip s 1 2 in. We re in dallas so we don t engineer for tremendous live loads for an asphalt shingle and we feel comfortable with 16 oc rafter spacing and 7 16 osb decking. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

For rafters or 16 in. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. For the curious 7 16 osb has a span rating of 24 16 and with supports every 24 inches is good for a roof live load of 40 psf pounds per square foot with a 10 psf dead load. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

Sheathing should be a minimum of 19 32 inch thick. 1 inch 25 4 mm. I m contemplating upgrading to 1 2 or even 5 8 osb though to reduce roof sag hopefully to nil. Secure roof sheathing panels to the roof framing with 8d common nails spaced six inches on center at the edges and twelve inches on center at intermediate supports.

Currently we space rafters 16 oc and use 7 16 osb with h clips. Panels are rated 32 16. Huber s zip system sheathing which we are using on the fhb house has a span rating of 24 16 for 7 16 in. The typical thickness range for sheathing is 3 8 to 3 4 inch.

The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Never attach roof sheathing with staples.