Residential Building Inspector B1Building Planning and Life SafetyMedium
An inspector is reviewing the plans for a new single-family dwelling that includes a bathroom with a shower. The shower stall will have a finished dimension of 30 inches by 30 inches. What is the minimum interior dimension allowed for a shower compartment?
- A24 inches by 24 inches
- B32 inches by 32 inches
- C30 inches by 30 inches
- D28 inches by 28 inches
Show answer & explanationAnswer & explanation
Correct answer: C. 30 inches by 30 inches
According to the 2021 IRC, Section P2708.1, the minimum interior dimension of a shower compartment shall be 30 inches by 30 inches (762 mm by 762 mm).
Why the other options are wrong
- A. 24x24 inches is too small for a shower compartment.
- B. 32x32 inches exceeds the minimum requirement, though it would be acceptable.
- D. 28x28 inches is too small for a shower compartment.
Shower Compartment Minimum Size
The smallest allowable interior dimensions for a shower stall, ensuring adequate space for showering.
- Applies to all new shower installations.
- Ensures occupant comfort and safety.
- Specified in IRC Section P2708.1.
Memory trick: Showers need space, thirty by thirty, to wash clean and be ready.