International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 487
hen needed the following fall. The most effective fence is of barb wire with one board atthe top, as shown in Fig. 513. Posts are spaced 8 feet betweencenters and set 2 feet (J inches into the ground. At intervalsof 500 feet on straight lines, and at every angle, bracesA B should be built into the… … Fig. 513. and second wires are 9 inches apart; the second and third,10 inches; the third and fourth, 10 inches apart, and thefourth is spaced 10 inches from the top board or rail, whichis 6 inches in width. This makes the total height of thefence 4 feet 0 inches, which is a lawful fence in most of…
Railroad engineering
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