. Railway track and track work . driver is shown in Fig. 228, 478 TRACK WORK. ami a numl^er of designs are described in the Proceedings of tlie Association ofRailway Superintendents of Bridges and Buildings, 1902. The pile-driver trainshould be in charge of a britlge foreman, acting also as conductor. When at workon renewals and repairs he must notify the train dispatcher, and put out pile-driver car used on the Missouri Pacific Ry. is 55 ft. long, and the lead-ers can be carried IG ft. ahead of the car body, so as to build 15-ft. has a reach of 14 ft. on either side. The l
. Railway track and track work . driver is shown in Fig. 228, 478 TRACK WORK. ami a numl^er of designs are described in the Proceedings of tlie Association ofRailway Superintendents of Bridges and Buildings, 1902. The pile-driver trainshould be in charge of a britlge foreman, acting also as conductor. When at workon renewals and repairs he must notify the train dispatcher, and put out pile-driver car used on the Missouri Pacific Ry. is 55 ft. long, and the lead-ers can be carried IG ft. ahead of the car body, so as to build 15-ft. has a reach of 14 ft. on either side. The leaders are 40 ft. long. A 3,000-Ib. hammer is used. The pile handling and hammer lines are led over differentsheaves on the leaders and over guide pulleys back to separate drums on theengine, which has two cylinders Ti X 10 ins. and two 12-in. drums. Steam issupplied by a vertical boiler. The car is fitted with two 1^-in. manila hammerlines, and two 1 J-in. pile lines having one end spliced to the ring of a -?>-in. crane Y3^. Fig. 229.—Wrecking Crab or Hand Hoist. chain 7 ft. long. The free end of the chain has a hook. Next to the pile caris a flat car equipped with a 20-ton hydraulic jack, 6 screw jacks, 2 snatchblocks for 2-in. line and 2 for li-in. line, 3 sets of blocks and falls for 1-in.,1 i-in. and Ij-in. line, 600 ft. of IJ-in. rope, a hand hoist (Fig. 229), 6 sets ofcarpenters tools, and a supply of bars, wrenches, chains, hauling lines, axes,spikes, nails, etc. Also a coal bunker and a 2,000-gallon water tank. Thecrew consists of an engineman, fireman and 7 men, or 24 men for emergencies;8 of these are laborers and the others bridge men. In 10 hours, this crewcould drive 5 bents of 4 piles each, cut them off, and fit caps, stringers, tiesand track. Fig. 230 shows a derrick car which can be used as a pile driver,having the leads suspended from the boom and held at the bottom by a bracerun out from the deck of the car. The A-frame is fixed, and is short enoughto al
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