The span rating provides a measure of the strength and stiffness in the direction parallel to the grain of the face and back veneers of the panel. The span rating on SHEATHING SPAN panels appears as two numbers separated by a slash (e.g., 32/16 or 48/24).Feb 1, 2021
How thick should plywood be to walk on?
Sizing the Plywood No matter what the spacing is on your ceiling joists, 3/4-inch plywood should be used if you plan on walking on it. If you plan on placing the plywood around the perimeter of the opening or door and using it only to store light boxes or materials, 1/2-inch-thick plywood should suffice.
What does a span rating of 40 20 Mean on plywood?
It means 40" o/c for framing members when the strength axis is across 3 or more supports when used for roof sheathing, or 20" o/c when used for subfloor.Jun 8, 2008
How Far Can 3/4 OSB span?
Span is permitted to be 24 inches on center where 3/4-inch wood strip flooring is installed at right angles to joist. Span is permitted to be 24 inches on center for floors where 11/2 inches of cellular or lightweight concrete is applied over the panels.
How far can you SPAN 3 4 plywood?
h. Maximum span 24 inches where 3/4-inch wood finish flooring is installed at right angles to joists.
What is span rating on plywood?
The span rating provides a measure of the strength and stiffness in the direction parallel to the grain of the face and back veneers of the panel. The span rating on SHEATHING SPAN panels appears as two numbers separated by a slash (e.g., 32/16 or 48/24).Feb 1, 2021
How thick of plywood should I use for a floor?
The recommended thickness of the plywood subfloor is governed by the spacing of the joists. Some experts suggest that 15/32-inch plywood should be standard if the underlying floor joists are spaced 16 inches apart or less, but slightly thicker 3/4-inch plywood should be used for joists spaced further apart.Sep 14, 2021