Osb Roof Sheathing Thickness

Page 6 of 7 v1 0 01 2008 osb roof design example calculations using asd 4x8 foot 24 16 teco sheathing span.

Osb roof sheathing thickness.

For pricing and availability. Cdx works fine in 1 2 or 5 8 thickness. 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.

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. 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. With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible.

For pricing and availability. 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. 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. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

With edge support and the same snow load 3 8 inch osb can be used. 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. Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

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