411.2 Pool stairs.
The design and construction of stairs extending into the pool in either shallow or deep
water, including recessed pool stairs, shall
comply with Sections 411 through 411.
411.2.1 Tread dimensions and area.
Treads shall be not less than 24 inches (607mm) at the
leading edge. Treads shall have an unobstructed su
rface area of not less than 240 square inches
) and an unobstructed horizontal depth of
not less than10 inches (254 mm) at the
Risers, except for the bottom riser, shall
have a uniform height of not greater than
12 inches (305 mm) measured at the center line. T
he bottom riser height is allowed to vary to the
The vertical distance from the pool
coping, deck, or step surface to the
uppermost tread shall be not greater than 12 inches (305 mm).
411.2.4 Bottom tread.
Where stairs are located in water depths greater than 48 inches (1219mm),
the lowest tread shall be not less than 48 inches (1219mm) below the deck and shall be recessed
in the pool wall.