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(0.7000)

(924.1)

(305.24)

(330.33)

(337.38)

(33.5-36.6)

FIGURE 25.32 Precast AASHTO I-beam sections: (a) AASHTO beam types II, III, and IV and (b) AASHTO beam types V and VI (FHWA 1990).

25.5.3.3 Box Girder

Figure 25.35 shows FHWA (1990) standard types of precast box sections. Figure 25.36 shows Caltrans standard precast "Bathtub" girder (Caltrans 2001). The shape of a cast-in-place prestressed concrete box girder is similar to the conventional reinforced concrete box girder (Figure 25.31c). The spacing of the

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