25. Twenty four-inch long, No. 2 taper-sawn wood shakes of naturally durable wood installed on a roof slope of 4:12 or greater shall have a MAXIMUM exposure of
Answer: B
Maximum exposure for wood shakes is 7 1/2 inches.
Wood shakes that are twenty-four inches long and classified as No. 2 taper-sawn, when installed on a roof slope of 4:12 or greater, should have a maximum exposure of 7 1/2 inches.
A) 5 1/2 inches.
This option is incorrect because a maximum exposure of 5 1/2 inches is not suitable for twenty-four-inch long shakes under the specified conditions. Such a narrow exposure would not conform to the guidelines for this type of installation.
B) 7 1/2 inches.
This option is correct as it aligns with the standards for wood shakes that are 24 inches long on a roof slope of 4:12 or greater. This maximum exposure ensures proper installation while maintaining the durability and performance of the wood shakes.
C) 8 inches.
An exposure of 8 inches exceeds the maximum allowance for the specified wood shakes in this scenario. Such an exposure could compromise the roof's integrity and performance by allowing excessive moisture penetration.
D) 10 inches.
This option is incorrect, as a maximum exposure of 10 inches is too high for twenty-four-inch long wood shakes installed at a 4:12 slope. This would not comply with the recommended installation guidelines and could lead to potential roofing issues.
Conclusion
The maximum exposure of 7 1/2 inches for No. 2 taper-sawn wood shakes installed on a roof slope of 4:12 or greater is the only option that meets the required standards for safe and effective roofing. All other options either underestimate or overestimate the exposure, potentially compromising the roofing system's performance and longevity.