This specification covers resilient stair treads made of rubber and thermoplastic vinyl for interior use. Treads covered by this specification includes the following types, class, and groups: Type TS, Type TP, Type TV, Class 1, Class 2, Group 1, and Group 2. The material requirements for the tread surface design, nosing style, and color are specified. Some typical nosing styles are illustrated. Treads shall meet the specified performance requirements for: (1) hardness, (2) molded stair tread bonding surface, (3) tread backs, (4) resistance to chemicals for short-term exposure, (5) resistance to heat, and (6) resistance to light. The prescribed dimensional requirements includes tread thickness, length, and depth. The sampling methods for the physical property tests are specified.
