A 24-foot wall is framed with studs at 16 inches on center and a stud at each end. How many layout studs are needed before extra king or jack studs?
Correct Answer
A) 19 studs.
Twenty-four feet is 288 inches. At 16-inch spacing, 288 / 16 = 18 spaces, so 19 studs are needed including both ends.
Why This Is the Correct Answer
Twenty-four feet is 288 inches. At 16-inch spacing, 288 / 16 = 18 spaces, so 19 studs are needed including both ends.
Why the Other Options Are Wrong
Option B: 18 studs.
18 studs. is below the supported result for wall framing layout; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 20 studs.
20 studs. is above the supported result for wall framing layout; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 22 studs.
22 studs. is above the supported result for wall framing layout; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Laying Out takeoff: count the condition before counting the package.
Reference Hint
Study anchor (closed-book): memorize Wall framing layout from California Residential Code, California Code of Regulations Title 24. / Title 24 California Residential Code wall framing layout concepts; know the rule or calculation trigger without relying on exam-room lookup.
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