What is the maximum span for 1/2-inch plywood with a span rating of 24/16 when used as roof sheathing?

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Multiple Choice

What is the maximum span for 1/2-inch plywood with a span rating of 24/16 when used as roof sheathing?

Explanation:
Span ratings tell you how far apart the supports can be when the panel is used in a specific application. For plywood used as roof sheathing, you read the first number. A 1/2-inch panel with a 24/16 rating can span up to 24 inches on center between roof framing members, while the second number (16) is for wall sheathing. So the maximum span for roof sheathing is 24 inches. The other options are either the wall limit (16 inches) or exceed the rating (28 inches); 20 inches is possible but not the maximum.

Span ratings tell you how far apart the supports can be when the panel is used in a specific application. For plywood used as roof sheathing, you read the first number. A 1/2-inch panel with a 24/16 rating can span up to 24 inches on center between roof framing members, while the second number (16) is for wall sheathing. So the maximum span for roof sheathing is 24 inches. The other options are either the wall limit (16 inches) or exceed the rating (28 inches); 20 inches is possible but not the maximum.

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