Ontario Building Code Practice Exam

A Grab bars, barrier-free entrance, and sink with knee clearance are all requirements for a barrier-free washroom in a commercial building. Grab bars provide support and stability for those with mobility disabilities, a barrier-free entrance allows for easy entry and exit for individuals using wheelchairs or mobility aids, and a sink with knee clearance allows for wheelchair users to comfortably use the sink.

B: A barrier-free entrance is a requirement for a barrier-free washroom in a commercial building, so this option is incorrect.

C: A sink with knee clearance is a requirement for a barrier-free washroom in a commercial building, so this option is incorrect.

D: This is the correct answer. A bathtub with a built-in seat is not a requirement for a barrier-free washroom. In fact, having a bathtub may even hinder accessibility for individuals with mobility disabilities. A barrier-free washroom should have an open shower area with a handheld showerhead for ease of use.