Roof Sheathing Thickness 16 Oc

The typical thickness range for sheathing is 3 8 to 3 4 inch.

Roof sheathing thickness 16 oc.

Huber s zip system sheathing which we are using on the fhb house has a span rating of 24 16 for 7 16 in. 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. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. 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.

Panels are rated 32 16. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Sheathing should be a minimum of 19 32 inch thick. I m contemplating upgrading to 1 2 or even 5 8 osb though to reduce roof sag hopefully to nil.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. 1 inch 25 4 mm.

What about the roof sheathing at 24 in. 8d ring shank nails should be used instead. For subfloors zip s 1 2 in. Currently we space rafters 16 oc and use 7 16 osb with h clips.

For rafters or 16 in. Never attach roof sheathing with staples. 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.