The diameter of grab bars should be 1¼ to 1½ inch (30-40 mm) (or the shape shall provide an equivalent gripping surface)
There must be a 1½ inch (40 mm) clearance from the wall.
Grab bars should not rotate in their fittings.
The required mounting height is universally 33 to 36 inches (840-910 mm) from the centerline of the grab bar to the finish floor.
ADA-style grab bars and their mounting devices should withstand more than 250 pounds of force.
In public toilet stalls, side grab bars must be a minimum of 42 inches long and mounted 12 inches from the rear wall, and rear grab bars must be a minimum of 36 inches long and mounted a maximum of 6 inches from the side wall.