Grab bar weight capacity varies by grab bar type, and most importantly, by the strength of the backing that the grab bar is mounted on.
According to federal ADA guidelines, it is required for a grab bar to be able to support up to 250 lbs (114 kgs) when installed in public places. This is because a grab bar is meant to support the user’s full body weight.
Grab bars are only as safe as their mountings! The stronger the mounting, the more weight a grab bar can hold. When considering what is a strong grab bar, you should focus on the grab bar mounting rather than the actual grab bar and shape itself.
Grab bars mounted into wall studs provide the most stability and security and have a weight capacity of 300 to 500 pounds.