Journeyman Plumber ExamFixtures, Faucets, and Other AppliancesMedium
A plumber is installing a wall-hung lavatory in a public restroom. According to ADA standards, what is the maximum height permitted for the rim or counter surface of the lavatory above the finished floor?
- A32 inches (813 mm)
- B36 inches (914 mm)
- C34 inches (864 mm)
- D30 inches (762 mm)
Show answer & explanationAnswer & explanation
Correct answer: C. 34 inches (864 mm)
According to ADA Accessibility Guidelines (ADAAG), the top of the lavatory rim or counter surface must be no higher than 34 inches (864 mm) above the finished floor.
Why the other options are wrong
- A. 32 inches is below the maximum allowed but not the specific maximum.
- B. 36 inches exceeds the maximum height permitted for accessible lavatories.
- D. 30 inches is typically the minimum clear knee space height under an accessible lavatory, not the maximum rim height.
ADA Lavatory Height
The maximum mounting height for the rim or counter surface of an accessible lavatory, as specified by the Americans with Disabilities Act (ADA) standards.
- Maximum 34 inches (864 mm) above finished floor.
- Provides clear knee and toe space underneath.
- Ensures usability for individuals in wheelchairs.
Memory trick: For ADA lavatories, 34 is the height, so all can wash with ease and light.