Coal tar built-up roofs shall have a design slope of a MINIMUM of what unit vertical within 12 units horizontal?

Rationale

Coal tar built-up roofs shall have a design slope of a minimum of 1/4 unit vertical within 12 units horizontal.

This slope ensures proper drainage and prevents water accumulation, which can lead to roof damage and deterioration over time. The specified minimum slope is critical for maintaining the integrity and longevity of coal tar roofs.

A (1) YOUR ANSWER

This option suggests a slope of 1 unit vertical for every 1 unit horizontal, which translates to a 100% slope. While this is adequate for drainage, it exceeds the minimum requirement and is not typically specified for coal tar built-up roofs.

B (1/2) YOUR ANSWER

This choice is a misrepresentation of slope notation. "01-Feb" does not conform to standard slope expressions and lacks clear meaning in this context. A slope must be expressed in a ratio or fraction format to communicate the vertical rise per horizontal distance accurately.

C (1/4) CORRECT

This option correctly indicates a minimum slope of 1/4 unit vertical within 12 units horizontal, which is essential for ensuring effective drainage on coal tar built-up roofs. This standard is widely accepted in roofing practices to mitigate water pooling issues.

D (1/8) YOUR ANSWER

Similar to option B, this choice does not accurately represent the required slope format. "01-Aug" is not a valid expression for slope in roofing terminology, making it irrelevant to the question regarding coal tar built-up roofs.

Conclusion

For coal tar built-up roofs, a minimum slope of 1/4 unit vertical within 12 units horizontal is necessary to facilitate proper drainage and prevent water-related issues. While options A, B, and D provided incorrect or irrelevant information, option C accurately reflects the standard requirement, emphasizing the importance of proper roof design in construction practices.

Coal tar built-up roofs shall have a design slope of a MINIMUM of what unit vertical within 12 units horizontal?

Coal tar built-up roofs shall have a design slope of a minimum of 1/4 unit vertical within 12 units horizontal.

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