The most common sizes are 18 and 24 inches and are one and a half inch in diameter so it easily fits in your hand.
Residential ada shower grab bar height.
The grab bar or bars shall be 33 36 inches 840 915 mm high.
The toilet paper dispenser shall be mounted below the grab bar at a minimum height of 19 inches 485 mm.
The problem is that installers often aim for one edge of the range and end up a bit high or low.
Generally grab bars should be installed at whatever height is most appropriate for their primary user.
Make sure to check the weight limit before you buy a grab bar.
Grab bars come in a variety of sizes some are as small as nine inches or as long as 36 inches.
In a transfer shower the bottom of the vertical bar must be 3 to 6 inches above the horizontal bar on that wall.
Grab bars shall not be provided above the seat.
But i would strongly recommend to take into consideration the height and physical capabilities of the person you are installing these grab bars for.
In toilets and showers the tops of horizontal grab bars need to be 33 to 36 inches from the floor.
Typically grab bars in the shower should be installed 33 to 36 inches from the floor of the bathroom this is according to ada americans with disabilities act standards.
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.
Grab bars shall be installed 6 inches 150 mm maximum from adjacent walls.
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 folding or non folding seat shall be provided in transfer type shower compartments.
Figure 608 3 3 grab bars for alternate roll in type showers.
Controls shall be located on the back long wall 27 inches 685 mm from the side wall.
This is a good starting range.
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.
For horizontal grab bars the ada standards require a height between 33 and 36 inches from the finished floor of the bathroom shower or tub.
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.