. Railroad construction. Theory and practice . 20305 27637 36097 45686 56402 68246 81219 25 14688 21151 28789 37601 47589 58752 71090 84603 tanks having a diameter of 24 feet, 16 feet high, and with acapacity of over 50,000 gallons are frequently employed. Ironor steel tanks are also used. In Table XIV is shown the capacity of cylindrical water-tanksin United States standard gallons of 231 cubic inches. Froni 302 RAILROAD CONSTRUCTION. §282. this table the dimensions of a tank of any desired capacitymay readily be found. Two or more tanks are sometimes usedrather than construct one of excessiv
. Railroad construction. Theory and practice . 20305 27637 36097 45686 56402 68246 81219 25 14688 21151 28789 37601 47589 58752 71090 84603 tanks having a diameter of 24 feet, 16 feet high, and with acapacity of over 50,000 gallons are frequently employed. Ironor steel tanks are also used. In Table XIV is shown the capacity of cylindrical water-tanksin United States standard gallons of 231 cubic inches. Froni 302 RAILROAD CONSTRUCTION. §282. this table the dimensions of a tank of any desired capacitymay readily be found. Two or more tanks are sometimes usedrather than construct one of excessive size. The smaller sizesshown in the table are of course too small for ordinary use,but that part of the table was filled out for its possible con-venience otherwise. On single-track roads where all enginesuse one track the tank may be placed 8 5 from the trackcenter; this gives sufficient clearance and yet permits the useof a single swinging pipe which will reach from the bottomof the tank to the tender manhole. In Fig. 160 is illustrated. Fig. 160.—Water-tank. one form of wooden tank. They are preferably manufacturedby those who make a special business of it and who by the useof special machinery can insure tight joints^ When it is incon-venient to place the tank near the track, or when there is adouble track, a ^stand-pipe becomes necessary. See § of the most difficult and troublesome problems is to preventfreezing, particularly in the valves and pipes Not only are thepipes carefully covered but fires must be maintained during coldweather. When the pumping is accomplished by means of asteam-pump, supplied from a steam-boiler in the pump-houseunder the tank, coils of steam-pipe may be employed to heat thewater or to heat the pipes Partial protection may be obtainedby means of a double roof and double bottom, the spaces beingfilled with sawdust or some other non-conductor of heat. I § 283. MISCELLANEOUS STRUCTURES AND BUILDINGS. 303 283. Pumping. The pumping is d
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