Concrete Cover in Prestressed Members

The minimum thicknesses of cover required by the ACI 318 Building Code for prestressed and nonprestressed reinforcement, ducts, and end fittings in prestressed concrete members are listed in Table 9.29.
The cover for nonprestressed reinforcement in prestressed concrete members under plant control may be that required for precast members (Table 9.26). When the general code requires fire-protection covering greater than that required by the ACI 318 Building Code, such cover should be used.
(PCI Design Handbook, Precast / Prestressed Concrete Institute.)

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