Stairway handrail surfaces

505.6 – Surfaces

505.6 Gripping Surface.
Handrail gripping surfaces shall be continuous along their length and shall not be obstructed along their tops or sides.  The bottoms of handrail gripping surfaces shall not be obstructed for more than 20 percent of their length.  Where provided, horizontal projections shall occur 38 mm (1 1/2″) minimum below the bottom of the handrail gripping surface.