Six key requirements are: -Handrails for ADA compliance are typically required to be on both sides of a set of stairs. -Handrailings must be at a consistent height and located a minimum distance of 34 inches to 38 inches from the walking surface. -Handrails must be continuous and uninterrupted by newel posts or other obstructions along the top or sides. -A clearance of 1-½ inches is required between the handrail gripping surface and adjacent surfaces for easy access to the rail.  -At the top and bottom of the stairs, the handrail must continue to slope or extend for a distance of one tread width of 12 inches beyond the bottom riser nosing. -The handrail at the top or bottom of the stairs must return back into a wall, guard, post, or landing. Making this connection helps to eliminate any protrusion that could catch on clothing, or be sharp. ADA compliance guidelines should be referenced for more information as it pertains to your project. In addition, another resource for stair building requirements is the Stair Manufacturers Association visual reference.