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

d, 64 : 20 :: 6000 : 1870.

e, 78 : 20 :: 6000 : 1540.

f, 92 : 20 :: 6000 : 1304.

g, 106 : 20 :: 6000 : 1132.

In fig. 69 A, assume the foot of the fifth brace (B) as the centre of pressure, and adding the moments, (or products of vertical components on the braces by their distance from B,) and we have the sum on the land side 18,928, and on the water side 16,930; showing that the centre is taken too far from the land side. In the same manner A will be found too far from the land side. A third trial will give the place.

Fig. 69 B.

Fig. 69 C.

Fig. 69 D.       Fig. 69 E.       Fig. 69 F.