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The supply-pipe is 4 in. in diameter and enters the tub through the floor, and is enclosed betweenthe ground and the bottom of the tank by a 5-ft. box. The discharge-pipe is 7 in. in diameter andconnected with an ordinary lid-valve on the bottom of the tub, which valve is kept closed by theweight of the water, but opened automatically from the outside as the spout is drawn down. As soonas the spout is released a counterweight draws the pipe up out of the way of the trains, and at thesame time the valve closes the entrance into the discharge-pipe.
The top of the floor of the tank is set 12 ft. above the top of rail, and the centre of the tank isspaced 21 ft. from the centre of the track, using an 8-ft. 6-in. drop-pipe. The roof is painted with amixture of mineral paint and boiled linseed-oil, and all finished work is painted with three coats ofapproved color. A ball-float is provided and connected with a gauge on the outside of the tank toindicate the height of the water in the tank.
The bill of material for this tank and trestle foundations is made up of the following items,namely : 10-in. X 10-in. sills; 10-in. X 10-in. posts; 10-in. X 10-in. caps; 6-in. X 12-in. joists; 2dn. X12-in. rough boards for false floor; 2-in. X 12-in., clear, white-pine boards for tank floor; 3-in. X 6-in.X 16-ft. staves; 2-in. X 6 in. rafters; 2-in. X 6-in. ribbons; -J-in. narrow flooring for roof; mouldingsand facia for cornice; braces, 6 in. X 8 in.; finial and finial brackets; i-in. tie-rods for trestle-bents.Also the following material: washers, bolts, spikes, wrought-iron hoops, hoop-clamps, valve-rod lever,fulcrum, goose-neck, drop-pipe, Batavia valve, cut-off valve, float-ball for gauge, pulleys for drop-pipe, chain for drop-pipe, counterweights, gauge-weight, gauge-slide, rough i-in. boards for boxaround supply-pipe, with door and fixtures complete for same.
Standard , 16 ft. X 24 ft., Circular Water-tank, Cincinnati Southern Railway. —The standard, 16ft. X 24 ft., circular water-tank of the Cincinnati Southern Railway and associated roads, with acapacity of 50,000 gallons, is built in general as per the plan shown in Fig. 246. The tub is 15 ft.deep in the clear, and 22 ft. 3 in. inside diameter at the top and 23 ft. inside diameter at the bottom.The centre of the tank is set 21 ft. 5 in. from the centre of the track, using an 8-ft. 5-in. drop-pipe.
The sides of the tub are built of 3-in. staves and the floor of 2-in. plank. The tub is bound bytwelve wrought-iron hoops. The floor is supported by 3-in. X 5|--in. joists, set 15 in. centres. Thejoists are supported in turn by 3-in. X 12-in. floor beams, spaced 16 in. centres. The floor-beams reston four trestle-bents, placed parallel with the track and spaced 7 ft. centres. The outside trestle-bentshave two posts, the inside bents have each four posts. The posts, caps, and sills of the bents are 12in. X 12 in. The middle bents are braced by 4-in. X 6-in. X-bracing and tied together with i-in. tie-rods. The roof is a regular circular roof with two thicknesses of i-in. boards, with building-paperlaid between them, resting on circular frames and covered with shingles.
The supply-pipe enters at the bottom of the tank, and is protected between the tank and theground by a frost-proof box about 7 ft. square, sheathed on the inside and outside with i-in. boards,leaving a 6-in. air-space. The discharge-pipe is 7 in. in diameter, and the entrance to it on the floorof the tub is closed with a lid-valve operated from the outside of the tank by a lever-arm and ropeattached to it. The rope is drawn down by the engineman, and kept down as long as he wishes waterto flow through the drop-pipe. The latter is counterweighted, and pulled down by hand prior toopening the valve. After the desired amount of water is taken the engineman lets go the rope at-tached to the valve-lever and then pushes the drop-pipe up to its original position. The foundationsof the trestles are either stone piers or timber.
The specification for water-stations and water-tanks on the Cincinnati Southern Railway willbe found embodied in the General Specifications for the construction of the Cincinnati SouthernRailway, printed in the Appendix at the back of this book.
Standard, 14 ft. X 22 ft., Circular Water-tank, Pennsylvania Railroad. —The standard, 14 ft. X 22ft., circular frost-proof water-tank of the Pennsylvania Railroad, shown in Figs. 250 to 258, with a ca-pacity of 35,040 gallons, is 13 ft. deep in the clear, and 22 ft. inside diameter at the bottom and 20 ft.10 in. inside diameter at the top. The sides are built of 3-in. staves, and the floor is built of 3-in.plank. The tub is bound by ten wrought-iron hoops, 4 in. X yV in. at the top of the tub and 5 in. XfV in. at the bottom, spaced 30 in. centres at the top and diminishing to a spacing of 8 in. centres atthe bottom. The floor of the tub rests on 3-in. X 5-in. joists, spaced about 18 in. centres, resting on 5-in. X 12-in. floor-beams, spaced 18 in. centres, which in turn are supported by four trestle-bents placed