In the casework package file, a stair has a total rise of 119 inches and 17 equal risers. What is each riser height?
Correct Answer
B) 7 inches.
Riser height equals total rise divided by riser count: 119 / 17 = 7 inches.
Why This Is the Correct Answer
Riser height equals total rise divided by riser count: 119 / 17 = 7 inches.
Why the Other Options Are Wrong
Option A: 7.25 inches.
7.25 inches. is above the supported result for stair riser calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option C: 5 inches.
5 inches. is below the supported result for stair riser calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option D: 6 inches.
6 inches. is below the supported result for stair riser calculation; it likely omits allowance, conversion, coverage, or final round-up.
Memory Technique
Stair Riser cart for Checking Framing: height first, rise second, whole the controlling choice last.
Reference Hint
Study anchor (closed-book): memorize Stair riser calculation from California Residential Code, California Code of Regulations Title 24. / Title 24 California Residential Code stair geometry concepts; know the rule or calculation trigger without relying on exam-room lookup.
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