Nevada Administrative Code
Chapter 444 - Sanitation
PUBLIC SPAS
Construction of Spa
Section 444.454 - Decks: Dimensional design

1. A continuous unobstructed deck at least 4 feet (1.22 m) wide, including the coping, must be provided around at least half of the perimeter of the spa. Deck and wall junctures must be coved with a minimum of 4 inches (10.16 cm). Decks elevated above the normal walking level of the area must have protective safety barriers at the edge as required by NAC 444.463.

2. Risers of steps for the deck must be uniform and be not less than 3.75 inches (9.53 cm) nor more than 7.75 inches (19.70 cm) high. The minimum tread width is 10 inches (25.40 cm).

3. The maximum slope of decks is .5 inch per foot (4.0 cm per meter) except for ramps. Ramps may have a slope of not more than 5 percent.

4. The maximum voids between adjoining concrete slabs or between concrete slabs and expansion joint material is .2 inch (.51 cm) of horizontal clearance, with a maximum difference in elevation of .25 inch (.64 cm).

5. Joints where spa coping meets concrete deck work must be watertight and must not allow water to seep to the ground beneath. Joints in decks must be provided to prevent cracks which may be hazardous because of differences in elevations, separation of surfaces or movement of the deck.

6. Areas where deck work joins concrete work other than the spa must be protected by expansion joints filled with nonrigid material such as mastic to protect the spa from the pressures of relative movements. In the absence of specific local engineering practices, the work must be performed in accordance with recommended practices of the American Concrete Institute.

7. Where deck work joins the spa coping, the joining areas must be designed and installed to protect adequately the spa coping and its mortar bed from damage as a result of reasonable movement of adjoining deck work.

8. Decks must be edged, radiused or otherwise relieved so as to present no exposed sharp corners.

9. Decks must be sloped as required by subsection 3 to drain to perimeter areas or to deck drains. Deck drains must not be greater than 25 feet (7.62 m) apart and must not return water to the recirculation system. Drains must remove spa splash water, deck cleaning water, and rainwater at a rate approximately equal to the rate of arrival without leaving excessive puddles.

10. Deck work must be designed and installed in accordance with engineering practices required in the area of installation. This includes, but is not limited to, the design and quality of the subbase when required, concrete mix design, and reinforcing. In the absence of specific local engineering practices, the work must be performed in accordance with recommended practices of the American Concrete Institute.