This paper discusses some problems about bridge superstructure, bridge substructure and bridge decking of city bridge design.

本文就城市桥梁设计中的桥梁上、下部结构及桥面系结构设计中的几个问题进行讨论。

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"A structurally deficient condition is a bridge that would have a rating of 4 either in the deck, the superstructure or the substructure, " he said.

CNN: States warned to inspect bridges