Core TradesQuestion 69 of 700
CALCULATION: A rectangular column is 18 in by 18 in in cross-section and 10 feet tall. Ignoring reinforcement, how many cubic yards of concrete does it contain?
a.About 0.83 cubic yards
b.About 1.11 cubic yards
c.About 1.50 cubic yards
d.About 2.00 cubic yards
Explanation
Cross-section = 1.5 ft x 1.5 ft = 2.25 sq ft. Volume = 2.25 x 10 = 22.5 cubic feet. 22.5 / 27 = 0.83 cubic yards. The larger answers assume bigger dimensions or a taller column.
Law Reference: 2025 CA Building Code, Chapter 19 (Concrete)Practice all 700 questions free — no signup required.
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