. A manual of the principles and practice of road-making: comprising the location, consruction, and improvement of roads (common, macadam, paved, plank, etc.) and rail-roads . lower ends, in shoulders, cut into the abutments. Sim-ilar braces may be applied to the bolsters of Fig. the span increased, these braces would become so Fig. oblique as to lose much of their efficiency. A straimng-piece is therefore interposed between them. Thirty-fivefeet may thus be spanned. For longer stretches, the bolsters, braces, and straining-beams may be combined, as in Fig. 93. The principle ofthis
. A manual of the principles and practice of road-making: comprising the location, consruction, and improvement of roads (common, macadam, paved, plank, etc.) and rail-roads . lower ends, in shoulders, cut into the abutments. Sim-ilar braces may be applied to the bolsters of Fig. the span increased, these braces would become so Fig. oblique as to lose much of their efficiency. A straimng-piece is therefore interposed between them. Thirty-fivefeet may thus be spanned. For longer stretches, the bolsters, braces, and straining-beams may be combined, as in Fig. 93. The principle ofthis method may be extended to very wide openings. 12 176 THE CONSTRUCTION OF 93.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectrailroa, bookyear1853
