Osb Thickness Roof

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

Osb thickness roof.

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. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. The roof of a riding arena made with strong panels consisting of 18mm thick swiss krono osb f. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.

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. With edge support and the same snow load 3 8 inch osb can be used. 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. Thicknesses range from 5 16 to 3 4 inch and the proper one to use. 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. Todd miller has spent his entire career in the metal building products manufacturing industry.

Most roofs are spaced at least 20 inches apart. 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. For this you can either go for a half inch or 5 8 inch thick sheet. Once the spacing hits 24 inches a 5 8 inch thick sheet is more ideal.

This riding arena was built using swiss krono osb f 15mm thick for the roof and 18mm thick for the walls. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. 25mm thick swiss krono osb 3 as a walkable subroof surface. Another issue that many people encounter is what size plywood the roof may need.