Tests on the third of a series of composite slab bridges are described and the results analysed. The bridge incorporated precast inverted T-beams, in situ concrete, and mild-steel transverse reinforcement.nThe bridge behaved satisfactorily under both the design and ultimate loading conditions for abnormal loading, provided that the individual beams were designed on the basis of the Ministry of Transport increased standard loading. The distribution properties were poorer by a maximum of 1O% than those of a similar isotropic slab under the abnormal load.
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