Chapter 5 Concrete Structures Contents
WSDOT Bridge Design Manual M Page 5-i June General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Concrete . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reinforcing Steel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prestressing Steel.
The nominal concrete compressive strength at release (ƒ' ci) is 6.0 ksi. Where higher strengths would eliminate a line of girders, the compressive strength at release may be increased to 7.5 ksi. Release strengths of up to 8.5 ksi can be achieved with extended curing for special circumstances. B. Classes of Concrete 1. Class 3000
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