Osb Roof Sheathing Thickness

Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8.

Osb roof sheathing thickness.

Allowable spans for lumber floor and roof sheathing a b for si. For pricing and availability. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. Some roofers or manufacturers don t like to install over skip sheathing but i ve never had a problem with it locally.

I ve never used commodity osb on a roof but it s probably fine in 5 8 thickness and possibly in 1 2 thickness. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. With edge support and the same snow load 3 8 inch osb can be used. Thicknesses range from 5 16 to 3 4 inch and the proper one to use.

For pricing and availability. 1 inch 25 4 mm. Page 6 of 7 v1 0 01 2008 osb roof design example calculations using asd 4x8 foot 24 16 teco sheathing span. 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.

You need to find a sheathing with a span rating of at least 32 16 which means either 15 32 or 1 2 thick osb. Cdx works fine in 1 2 or 5 8 thickness. 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. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8.