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

Cast-Iron

a = W
25,000,

Wood

a = W
1,000.

CROSS STRAIN.

162. The power of any material to resist a cross strain, is shown by the formula

W = 4sbd²
L,

Where W represents the breaking weight in pounds,

s represents the constant in the table of woods,

b represents the breadth in inches,