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What is the maximum allowable span of 1/2 inch plywood roof sheathing with a panel span rating of 24/0, without edge support?

  1. 16 inches

  2. 22 inches

  3. 24 inches

  4. 29 inches

The correct answer is: 24 inches

The maximum allowable span for 1/2 inch plywood roof sheathing with a panel span rating of 24/0 is indeed 24 inches. The span rating indicates the maximum distance between supports that the panel can safely span without compromising structural integrity. A panel span rating of 24/0 means it is designed to be used in situations where it can support loads over a distance of up to 24 inches without the need for edge support. In construction, this rating is crucial as it helps ensure that the sheathing can withstand the weight and stresses placed upon it, such as snow load, wind shear, and other factors that impact roofs. The sheathing must be adequately supported to maintain the structural performance of the roof assembly, and the 24-inch span rating signifies that this thickness and type of plywood can handle that spacing effectively. Understanding these specifications is essential for determining proper construction methods and materials, ensuring safety and compliance with building codes.