Osb Roof Sheathing Thickness

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

Osb roof sheathing thickness.

With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. I ve never used commodity osb on a roof but it s probably fine in 5 8 thickness and possibly in 1 2 thickness. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. 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.

Thicknesses range from 5 16 to 3 4 inch and the proper one to use. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. Allowable spans for lumber floor and roof sheathing a b for si. Page 6 of 7 v1 0 01 2008 osb roof design example calculations using asd 4x8 foot 24 16 teco sheathing span.

Some roofers or manufacturers don t like to install over skip sheathing but i ve never had a problem with it locally. For pricing and availability. For pricing and availability. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

1 inch 25 4 mm. 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. 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.

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.