BENJAMIN SEVERSON'S IRON BRIDGE. Figure 1. PRANK CAISC their several points of construction with the lower part of the truss. And these braces be ing connected to the end pieces opposite the ends of the upper rigid arc and by means 892 GYM CIIMIllt SKIM IM.W lir . of its strength. Besides the trusses for sus taining loads on this bridge the girders and tons., scientific american, 1851-05-03
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