WAC 246-359-310   Roof sheathing for wood framed construction and concrete masonry units.  Roof sheathing shall be structural wood panels (plywood, OSB) with a minimum five-eighths inch thickness, grade stamped for use and span. Secure roof sheathing panels to the roof framing with 8d common nails, spaced six inches on center at the edges and twelve inches on center at intermediate supports.



[Statutory Authority: RCW 70.114A.081. 99-03-065, § 246-359-310, filed 1/18/99, effective 2/18/99.]