. Railroad structures and estimates . eel Costs (approx. average). Foun-dation. $ 75 120195497248 43840095396420 200196300312312 2552754247301952 *1300900255265308 1586t869700t586t869 Super-struc. $ 6601150110216652008 13121204126614041680 13001204120014881688 20952475170424662466 12002100229526852238 19871987280042284228 Total. $ 7351270129721622256 17501604136118002100 .15001400150018002000 23502750212831964418 25003000255029502546 25732856350048145097 Per M. gal. $
. Railroad structures and estimates . eel Costs (approx. average). Foun-dation. $ 75 120195497248 43840095396420 200196300312312 2552754247301952 *1300900255265308 1586t869700t586t869 Super-struc. $ 6601150110216652008 13121204126614041680 13001204120014881688 20952475170424662466 12002100229526852238 19871987280042284228 Total. $ 7351270129721622256 17501604136118002100 .15001400150018002000 23502750212831964418 25003000255029502546 25732856350048145097 Per M. gal. $ * No. 21 — Foundation cost includes tower. t Nos. 26, 27, 29 and 30; standpipe type capacity above the twelve-foot line. Costa are forwarm and cold climates respectively. PUMP LOCATION UNDER TANK. 445 In some locations it is convenient to place the pumping outfitin the enclosure under the tank, and when this is done the layoutas shown on Fig. 210 is usually adopted, when the enclosedtype of tank is Note :-Height of coal supported byStudding, should be limitedto 40to avoid bulging ofhousing. SECTION A-A Fig. 210. In many situations it is often desirable to place the tank awayfrom the track and to feed to the locomotive through a discharge in U S. gallons per minute from water tank tostandpipe for various supply pipes is given in Table 115, page 437. 446 STEEL TANKS. Steel Tanks. The necessity for tanks of large capacity and the scarcity andhigh cost of select timber for wooden tanks has brought aboutthe development of the steel tank. The conical bottom tj^pe of steel tank, Fig. 212, on accountof its adaptability to act as a settling basin for the purpose ofprecipitating matter carried in suspension, and the ease withwhich the resultant sludge can be washed out without inter-rupting service, has made it very satisfactory for railway watersupply storage and a number of roads have adopted this typeof tank as standard. The design co
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