. Handbook of railroad construction; for the use of American engineers. Containing the necessary rules, tables, and formulæ for the location, construction, equipment, and management of railroads, as built in the United States .. . Span. Rise. 25 840 1050 10 Chords. 2 — 6x82—7x92 — 8 X 10 Posts. 6X86X96X12 Braces. 5X55X85X10 222 Bods. -1 or 1 — 1 13 -■•8 1^^8 -If Fig. 99. 50 to 75 Span. Rise. 50 8 60 9 75 10 8 X 10 2. 8 X 10 3. 8 X 10 Posts. 1—8X 10l_8x 102 — 8x10 Fig. 100. 50 to 75 feet. Braces. 2 — 6x7 2 — 6 X7 3 — 6x8 Lattice. 2X62X62X6

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Keywords: ., bookcentury1800, bookdecade1850, booksubjectrailroadsdesignandco