An ADA-compliant grab bar handrail must be fully anchored and have a smooth surface that can be easily grabbed. Grab bars with circular cross sections must be 1 1/4 to 1 1/2 inches in diameter. Those with non-circular cross sections must have cross sections of no more than 2 inches and a perimeter between 4 and 4.8 inches.

Requirements for ADA Grab Bars Regardless of where they are placed, grab bars must: Be 1-½ inches away from the wall or support structure. Be at least 1-½ inches away from any objects or protrusions at the ends or bottom of the bar. Be at least 12 inches below any objects or protrusions above the bar. Be installed 33-36 inches above the floor.

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).

According to ADA standards, grab bars are required in all accessible toilet stalls. Grab bars with circular cross-sections should have an outside diameter measuring 1.25-2 inches. Grab bars with non-circular cross-sections (ovals or rectangles) should have a cross-section measuring no more than 2 inches across and 4 inches around (perimeter).