Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 532
nd them. On sandybottom concrete was placed about 6 feet below the surface. On a portion ofthe line a right of way 50 feet wide was secured; the tracks were supported onplate girders resting upon piers of brick masonry, with foundations of concretebelow the surface of the ground. The brick piers… … Fig. 1232. one, with a wrought-iron base. In neither is there any cap except that con-nected with the post base, and the anchorage is to cast-iron plates wholly with-in the masonry, which is of concrete. Fig. 1237 is a plan of one of the stone piers of the railway bridge acrossthe Susquehanna at…
Mechanical drawing
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