. Railway track and track work . driver is shown in Fig. 228, 478 TRACK WORK. and a number of designs are described in the Proceedings of the Association ofRailway Superintendents of Bridges and Buildings, 1902. The pile-driver trainshould be in charge of a bridge 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 16 ft. ahead of the car body, so as to build 15-ft. has a reach of 14 ft. on either side. The lead
. Railway track and track work . driver is shown in Fig. 228, 478 TRACK WORK. and a number of designs are described in the Proceedings of the Association ofRailway Superintendents of Bridges and Buildings, 1902. The pile-driver trainshould be in charge of a bridge 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 16 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-lb. 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 7| X 10 ins. and two 12-in. drums. Steam issupplied by a vertical boiler. The car is fitted with two 1 J-in. manila hammerlines, and two lj-in. pile lines having one end spliced to the ring of a |-in. crane m^&>. s^EMI? 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 lj-in. line, 3 sets of blocks and falls for 1-in.,lj-in. and l|-in. line, 600 ft. of lf-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
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