tration an example which may serve toshow how these bridges are constructed, and how the differentparts are united so as to give the required tenacity and thenecessary rigidity to the force and velocity of a railway train.This bridge supports the Inverness and Aberdeen Junction Eail-way across the… … of two wrought-iron tubular girders, each 16 feet deep, 3 feet6 inches ynde. Each girder is of sufficient length, 245 feet, to FOR THE CONSTRUCTION OF BRIDGES. 255 give a bearing surface of 7 feet 6 inches on the piers at each end.It is supported on one side upon cast-iron bed-plates, and atthe…
Building, Iron and steel
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