Osb Thickness Roof

Fortunately this is one issue that has primarily been standardized by the industry.

Osb thickness roof.

He is president of isaiah industries an organization recognized as one of the world s leading metal roofing manufacturers. 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. The roof of a riding arena made with strong panels consisting of 18mm thick swiss krono osb f. Another issue that many people encounter is what size plywood the roof may need.

Do not do anything that might later void the wind warranty they offer. 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. Most roofs are spaced at least 20 inches apart. With edge support and the same snow load 3 8 inch osb can be used.

25mm thick swiss krono osb 3 as a walkable subroof surface. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. 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. In this case you can t use a 3 8 inch thick sheet.

However you might find that osb can better suit your needs than plywood for the roof. 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. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8. Todd miller has spent his entire career in the metal building products manufacturing industry.

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. 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. For this you can either go for a half inch or 5 8 inch thick sheet.