A patio finish slopes toward the building at 1/8 inch per foot for 12 feet. How much fall is directed toward the wall?
Correct Answer
C) 1.5 inches.
At 1/8 inch per foot for 12 feet, the slope directs 1.5 inches of fall toward the wall.
Why This Is the Correct Answer
At 1/8 inch per foot for 12 feet, the slope directs 1.5 inches of fall toward the wall.
Why the Other Options Are Wrong
Option A: 1 inch.
1 inch. is below the supported result for exterior finish slope calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 1.25 inches.
1.25 inches. is below the supported result for exterior finish slope calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option D: 2 inches.
2 inches. is above the supported result for exterior finish slope calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Measure to inch, adjust for foot, then let Checking Grade set the finish line.
Reference Hint
Study anchor (closed-book): memorize Exterior finish slope calculation from California Building Code, California Code of Regulations Title 24. / Title 24 California Building Code site drainage and exterior walking surface concepts; know the rule or calculation trigger without relying on exam-room lookup.
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