In Florida construction, what is the minimum slope required for a built-up roof system to ensure proper drainage?
Correct Answer
B) 1/4 inch per foot
The Florida Building Code requires a minimum slope of 1/4 inch per foot for built-up roofing systems to ensure positive drainage and prevent ponding water.
Why This Is the Correct Answer
The Florida Building Code specifically mandates a minimum slope of 1/4 inch per foot for built-up roofing systems to ensure positive drainage. This slope requirement prevents water from ponding on the roof surface, which can lead to premature deterioration of roofing materials and potential structural damage. The 1/4 inch per foot slope provides adequate drainage while being practical for construction and cost-effective to implement.
Why the Other Options Are Wrong
Option A: 1/8 inch per foot
1/8 inch per foot is insufficient slope for proper drainage and does not meet Florida Building Code requirements for built-up roof systems
Option C: 1/2 inch per foot
1/2 inch per foot exceeds the minimum requirement and while acceptable, is not the minimum standard specified by the code
Option D: 1 inch per foot
1 inch per foot is excessive and far exceeds the minimum requirement, making it unnecessarily costly and impractical for most applications
Memory Technique
Think 'Quarter drainage' - 1/4 inch per foot is the quarter you need to pay for proper roof drainage in Florida
Reference Hint
Florida Building Code Chapter 15 - Roof Assemblies and Rooftop Structures, Section 1507 for built-up roof requirements
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