General. Every exterior and interior flight of stairs
having more than four risers shall have a handrail on one side of
the stair and every open portion of a stair, landing, balcony, porch,
deck, ramp or other walking surface which is more than 30 inches (762
mm) above the floor or grade below shall have guards. Handrails shall
not be less than 30 inches (762 mm) high or more than 42 inches (1067
mm) high measured vertically above the nosing of the tread or above
the finished floor of the landing or walking surfaces. Guards shall
not be less than 30 inches (762 mm) high above the floor of the landing,
balcony, porch, deck or ramp or other walking surface.
