Roof Decking Thickness 6 Oc

This is the most common decking board sold.

Roof decking thickness 6 oc.

The typical thickness range for sheathing is 3 8 to 3 4 inch. 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. Structures that already comply are exempt from this requirement i e. Based on standard 16 oc joist spacing and type of material this may be the minimum allowable thickness.

The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the. Eight quarter or 8 4 or 2x e g 2 x 6 2 x 4. Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Sheathing should be a minimum of 19 32 inch thick. 706 7 when a roof covering on an existing site built single family residential. If the plywood thickness is less than or the osb less than 7 16 it is going to be weak with the roof rafters spaced the standard 2 on center. Never attach roof sheathing with staples.

What is plank sheathing. Controlled random layup two inch decking. End joints in 2 in. Permitted under the 2004 code or newer.

In the first half of the 20th century roofs in missouri were built with wood shingles. Deck re nailing fbc existing building section 706 7 establishes the requirement that the roof decking is to be re nailed. 2017 fbc building 6 th edition 23 wood 2304 general construction requirements 2304 8.