ottom. same time raises the aprons which cover the gap left fitted with fine hammered steel fulerum pins, bronze The wind bracing of the top chord system consists of for expansion and contraction, and the electric car rollers and bronze bushings, and operate directly by small lattice girders 20… … bottom chords. Above the cost of the approaches. floor beams is laid a com- The latter have been ren- plete steel buckle-plate or dered necessary by the trough floor, which is covered with concrete and clutch on the horizontal turning shaft, which, at a raising of the height of the bridge from six…
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