Prestressed Concrete: Classes, Environments, Reinforcement, and Roofing
Classified in Geology
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Prestressing Classes and Environments
Classes
- Class I: Elements whose conditions of use require the absence of cracking.
- Class II: Elements whose conditions of use can accept some risk of cracking under certain conditions.
- Class III: Elements whose conditions of use can support a controllable amplitude of cracking.
Environments
- I: Inside buildings or outside of moisture.
- II: External, non-aggressive contact with water or ground.
- III: Aggressive atmosphere, industrial or marine, or land contact with water or aggressive substances.
Active Reinforcement Types (P)
- Wire: A product of solid section from a cold drawn or drawn from alumbrón, normally supplied in a roll. Diameter: 3, 4, 5, 6, 7, 7.5, 8, 9.4, 10 mm.
- Bar: A solid product that is supplied