Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.
Osb roof sheathing thickness 16 oc.
Design capacities for oriented strand board allowable stress design asd.
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.
Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.
Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot.
7 16 cat ps2 10 osb sheathing application as 4 x 8.
Floor sheathing over supports spaced up to 16 inches o c.
The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.
With edge support and the same snow load 3 8 inch osb can be used.
16 oc 20 oc 24 oc 32 oc 48 oc 500 575 770 1 050 1 900 180 250 385 685 1 200 2 600 2 900 3 350 4 000.
Find osb sheathing osb at lowe s today.
1 inch 25 4 mm.
The span rating on floor span panels appears as a single number e g 20 o c.
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Edge support is typically provided by tongue and grove sheathing panels or panel clips.
Osb used in structural sheathing applications in the u s.
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Floor span panels are designed for single floor applications and are manufactured with span ratings of 16 20 24 32 and 48 inches o c.
Relationship between span rating and nominal thickness for osb a nominal thickness b in span rating.
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 pricing and availability.