Reinforcing Bar Support Specifications and Standard Nomenclature
The types of support it shall be provided In standard sizes as given below.
Bar supports are classified in terms of methods employed to minimize from the surface of the concrete, rust spots, or similar blemishes directly caused by the bar support. The five classes and their intended degree a/ protect.ion are:
- Bright Basic - which has no protection against rusting and which is intended for use in situations where surfaces blemishes can be tolerated.
- Plastic Protected - which is intended for use in situations of moderate exposure and/or situations requiring rubbing or sandblasting of the concrete surface.
Specifications, drawings, details and purchase orders shall identify bar supports by nominal height, symbols of type or support, and class of protection. (Example: 3½ • CHC • C identifies a 3½ in. height, continuous high chair Class C - Plastic Protected.)