Plywood Roof Sheathing Maximum Span

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.

Plywood roof sheathing maximum span.

A the left hand number denotes the maximum recommended spacing of supports when the panel is used for roof sheathing. Once you have the area you can divide by the area of a sheet of plywood to find the number of sheets needed. A 4 8 sheet of plywood is 32 ft 2. The tables do not apply directly to plywood having a single span.

It adds proven performance and durability to new homes room additions and renovations. Tables 2a through 2c apply to apa rated osb sheathing apa rated osb structural i sheathing and apa rated osb sturd i floor respectively. Structural floor sheathing and structural roof sheathing shall comply with sections 2304 7 1 and 2304 7 2 respectively. For face grain parallel to supports tables are based on three spans for spans of 16 and less and two spans for 24.

Plywood sheathing delivers outstanding rigidity strength and versatility and is an excellent choice for. The first number is the maximum on center o c support spacing in inches for roof sheathing. For one span condi tions use the span adjustment factors. Find plywood sheathing plywood at lowe s today.

The span rating on sheathing span panels appears as two numbers separated by a slash e g 32 16 or 48 24. So dividing the area of the roof by 32 will give you the number of. Support spacing when the panel is used for subflooring. Table 2304 7 1 allowable spans for lumber floor and roof sheathing a b span inches.

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Plywood sheathing is ideal for residential and light plywood sheathing is ideal for residential and light construction and every piece meets the highest grading standards for strength and appearance. The span rating on apa rated sheathing panels appears as two numbers separated by a slash such as 32 16 48 24 etc. For sanded plywood panels see table 3.

A panel marked 32 16 may be used for roof. Of 32 and less three spans are assumed and two spans for spans greater than 32. If your roof has triangles and other shapes you ll need to use a calculator to find the square footage.