What is the minimum length required for grab bars at toilets on the rear side?

The minimum length required for grab bars located on the rear side of toilets is indeed 36 inches. This dimension is established by accessibility standards such as the Americans with Disabilities Act (ADA) and International Building Code (IBC), which specify that grab bars should provide adequate support for individuals when using the toilet.

A 36-inch grab bar provides sufficient coverage to assist users when they are transitioning to and from the toilet. This length ensures that users have a stable handhold that can be reached easily from both sides of the toilet, thereby enhancing safety and independence.

Longer lengths, such as those proposed for other options, may be found in different contexts or locations within a restroom, but the specific requirement for the rear grab bar position is clearly defined as 36 inches by the relevant codes.