Core TradesQuestion 8 of 700
For a typical residential interior slab-on-ground, what is a common MINIMUM slab thickness?
a.3-1/2 inches
b.5 inches
c.6 inches
d.8 inches
Explanation
Residential concrete floor slabs on ground are commonly required to be at least 3-1/2 inches thick. The greater thicknesses listed apply to heavier-duty slabs but exceed the ordinary minimum.
Law Reference: 2025 CA Residential Code (CRC) R506 (Concrete Floors on Ground)Practice all 700 questions free — no signup required.
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