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

Span	30 feet,	Whence—
Length	34 feet,	Length	34 feet,
Load	10 tons at centre.	Span	30 feet,
		Depth	25½ inches,
		Lower flange	32.58 square inches,
		Upper flange	5.34 square inches,

a = 6 × 10 × 12 × 30
26 × 34 × 12
16 = 32.58

and 32.58
6.1 = 5.34.

— [141], last line, Fig. 63 A was omitted; it is the same as fig. 102, page [200], inverted.

— [142], last line, for “span,” read “spans.”

— [146], head of col. 7, for “Top Washer,” read “Thickness of Washer.”

— [150], after line 9, Figs. 67 D and 67 E (page [153]) should be inserted.

— [151], l. 3, for “W = 2249,” etc., read “W = 2240,” etc.

— [151], l. 18, for “opposite to 31,416, is the diam. 1⅝,” read “opposite to 41,415, is the diam. 1⅞.”

— [151], l. 19, for “1⅝,” read “1⅞.”