The current ada standards dictate the height of an ada handrail must be a minimum of 34 inches and a maximum of 38 inches from the walking surface to the top of your grab rail.
Ada stair railing height.
4 9 2 treads and risers.
Stair treads shall be no less than 11 in 280 mm wide measured from riser to riser.
Each stair tread is 11 inches 280 mm deep minimum with a sloped riser.
Top of gripping surfaces of handrails shall be 34 inches 865 mm minimum and 38 inches 965 mm maximum vertically above walking surfaces stair nosings and ramp surfaces.
Height from surface 34 38.
On any given flight of stairs all steps shall have uniform riser heights and uniform tread widths.
Handrails shall be at a consistent height above walking surfaces stair nosings and ramp surfaces.
On any given flight of stairs all steps shall have uniform riser heights and uniform tread widths.
Stairs required to be accessible by 4 1 shall comply with 4 9.