Transcription of Chapter 5 Concrete Structures Contents
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WSDOT Bridge Design Manual M Page 5-i June General .. Materials .. Concrete .. Reinforcing Steel .. Prestressing Steel .. Prestress Losses .. Prestressing Anchorage Systems .. Post-Tensioning Ducts .. Design Considerations .. Service and Fatigue Limit States .. strength -Limit State .. Strut-and-Tie Model .. Deflection and Camber .. Construction Joints .. Inspection Access and Lighting .. Reinforced Concrete Box Girder Bridges .. Box Girder Basic Geometries .. Reinforcement .. Crossbeam .. End Diaphragm .. Dead Load Deflection and Camber.
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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