Osb Thickness Roof

In this case you can t use a 3 8 inch thick sheet. 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. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.

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Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8.

Osb thickness roof.

The roof of a riding arena made with strong panels consisting of 18mm thick swiss krono osb f. Do not do anything that might later void the wind warranty they offer. Todd miller has spent his entire career in the metal building products manufacturing industry. 25mm thick swiss krono osb 3 as a walkable subroof surface.

This riding arena was built using swiss krono osb f 15mm thick for the roof and 18mm thick for the walls. 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. 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. Fortunately this is one issue that has primarily been standardized by the industry.

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. Another issue that many people encounter is what size plywood the roof may need. Most roofs are spaced at least 20 inches apart. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

For this you can either go for a half inch or 5 8 inch thick sheet. For heavier loads a 40 20 rated panel 19 32 or 5 8 will support a 130 psf live load and 48 24 rated panels 23 32 or are good to175 psf. Thicknesses range from 5 16 to 3 4 inch and the proper one to use. Once the spacing hits 24 inches a 5 8 inch thick sheet is more ideal.

However you might find that osb can better suit your needs than plywood for the roof. With edge support and the same snow load 3 8 inch osb can be used. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. He is president of isaiah industries an organization recognized as one of the world s leading metal roofing manufacturers.

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