Osb Thickness Roof

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.

Osb thickness roof.

With edge support and the same snow load 3 8 inch osb can be used. 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. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. Most roofs are spaced at least 20 inches apart.

This riding arena was built using swiss krono osb f 15mm thick for the roof and 18mm thick for the walls. 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. Todd miller has spent his entire career in the metal building products manufacturing industry.

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 comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. 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. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

Fortunately this is one issue that has primarily been standardized by the industry. For this you can either go for a half inch or 5 8 inch thick sheet. Another issue that many people encounter is what size plywood the roof may need. Thicknesses range from 5 16 to 3 4 inch and the proper one to use.

Do not do anything that might later void the wind warranty they offer. However you might find that osb can better suit your needs than plywood for the roof. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8. 25mm thick swiss krono osb 3 as a walkable subroof surface.