Roof Sheathing Thickness 16 Oc

The typical thickness range for sheathing is 3 8 to 3 4 inch. 16 oc 0 594 0 625 20 oc 0 594 0 625 24 oc 0 719 0 750 32 oc 0 875 1 000 48 oc 1 125 a the values in this table correspond with those published in the 2005 edition of the. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

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Loads will vary with the pitch of the roof.

Roof sheathing thickness 16 oc.

Sheathing should be a minimum of 19 32 inch thick. 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. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Osb roof decking thickness 7 16 1 2 or 5 8 currently we space rafters 16 oc and use 7 16 osb with h clips.

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. Most roofs will be sheathed in plywood at least 3 8 inch thick. Nominal panel thickness table b assists in calculation of. 1 inch 25 4 mm.

8d ring shank nails should be used instead. Never attach roof sheathing with staples. 24 16 teco sheathing span. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

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