This is a good starting range.
Handicap grab bar height.
The toilet paper dispenser shall be mounted below the grab bar at a minimum height of 19 inches 485 mm.
Each grab bar shall be 24 inches 610 mm long minimum and shall be installed 24 inches 610 mm maximum from the head end wall and 12 inches 305 mm maximum from the control end wall.
A 42 inches 1065 mm minimum length grab bar is required on the side wall spaced a maximum of 12 inches 305 mm from the back wall and extending a minimum of 54 inches 1370 mm from the back wall at a height of 33 36 inches 840 915 mm.
Always attach grab bars to studs or use secure mounting anchors the manufacturer recommends.
The toilet paper dispenser shall be mounted below the grab bar at a minimum height of 19 inches 485 mm.
Minimum length of grab bars is also regulated with specific minimum ranges for attachment locations.
Generally a 16 in grab bar or a grab bar that is a multiple of 16 16 in 32 in or 48 in works best.
Be careful with height in toilets and showers the tops of horizontal grab bars need to be 33 to 36 inches from the floor.
Each grab bar shall be 24 inches 610 mm long minimum and shall be installed 24 inches 610 mm maximum from the head end wall and 12 inches 305 mm maximum from the control end wall.
The controls shall be placed in an area between 38 48 inches 965 1220 mm above the floor.
The grab bar or bars shall be 33 36 inches 840 915 mm high.
Two grab bars shall be installed on the back wall one located in accordance with 609 4 and other located 8 inches 205 mm minimum and 10 inches 255 mm maximum above the rim of the bathtub.
Outside diameter of the grab bars for the most part is required to be 1 to 2.
In most cases studs are located 16 inches apart on center.
The problem is that installers often aim for one edge of the range and end up a bit high or low.
It is helpful to use this range as a guide for placement but the most important part is selecting a height that feels comfortable and secure for the person using them.
Two grab bars shall be installed on the back wall one located in accordance with 609 4 and other located 8 inches 205 mm minimum and 10 inches 255 mm maximum above the rim of the bathtub.
Controls shall be located on the back long wall 27 inches 685 mm from the side wall.
A 42 inches 1065 mm minimum length grab bar is required on the side wall spaced a maximum of 12 inches 305 mm from the back wall and extending a minimum of 54 inches 1370 mm from the back wall at a height of 33 36 inches 840 915 mm.
The shower head and control area may be located on the back wall or on either side wall.
However ada standards recommend that rear grab bars be installed at the height of between 33 and 36 inches above the finished floor of the tub shower or bathroom.
Generally grab bars should be installed at whatever height is most appropriate for their primary user.