For handicap accessible bathtubs, controls must be positioned between the bathtub rim and __________.

The requirement for controls on handicap accessible bathtubs to be positioned between the bathtub rim and a grab bar is based on accessibility standards. This positioning ensures that individuals with disabilities can easily reach and operate the controls without strain or difficulty. Grab bars are specifically designed to provide support and stability to users, and having the controls within this range facilitates independence and safer use of the bathtub.

Positioning the controls too high or too low could make them difficult for individuals who may have limited mobility, reach, or strength. Therefore, aligning with the grab bar offers a balance between accessibility and safety, allowing users to maintain stability while adjusting water temperature or flow. This aspect is critical in designing accessible bathrooms that accommodate the needs of all users, particularly those with physical limitations.