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.

by George L. Vose

whence the necessary area of section of any material to resist a tensile strain, is found by the following rules:—

Wrought Iron

a = W
15,000,

Cast-Iron

a = W
4,500,

Wood

a = W
2,000.

COMPRESSION.

161. Wrought Iron

a = W
12,000,