Section 444.446 - Recessed treadsRecessed treads, when provided, must meet the following specifications:
1. Stepholes must be: (a) Uniformly spaced, not more than 1 foot (30.48 cm) nor less than 7 inches (17.48 cm) apart at the centerline.(b) At least 5 inches (12.70 cm) deep and at least 1 foot (30.48 cm) wide.2. Stephole treads must be sloped to drain into the spa to prevent accumulation of dirt.3. The vertical distance between the spa coping edge and the uppermost recessed tread must be 1 foot (30.48 cm) or less.4. Each set of recessed treads must be provided with two handrails which fully serve all treads and risers.Nev. Admin. Code § 444.446
Bd. of Health, Public Spa Reg. Art. 12 §§ 12.5-12.5.5, eff. 11-27-79