. Railroad structures and estimates . ^ steel tanks are provided for storing the oil, varying incapacity from 500 to 2000 gallons or more; they are set up onconcrete supports in the basement, so that they can be easilyexamined and cleaned. When the supply is brought by barrels, they are dumped overfillers inside the house or outside on the platform if desired;when filled from car service tanks, the pipes are extended underthe platform and provided with stop cocks and hose connectionsas per Fig. 268. The floor over the basement is usually heavy plank not lessthan 3 in. thick, or reinforced conc
. Railroad structures and estimates . ^ steel tanks are provided for storing the oil, varying incapacity from 500 to 2000 gallons or more; they are set up onconcrete supports in the basement, so that they can be easilyexamined and cleaned. When the supply is brought by barrels, they are dumped overfillers inside the house or outside on the platform if desired;when filled from car service tanks, the pipes are extended underthe platform and provided with stop cocks and hose connectionsas per Fig. 268. The floor over the basement is usually heavy plank not lessthan 3 in. thick, or reinforced concrete. A trap door and smallship ladder are necessary to gain access to the basement, thetrap door and frame being made fireproof. No other openingsare provided, electric light being used when desired for inspectionpurposes. The tanks are generally ventilated by a pipe connecting each. PLAN ,iT. & G- Boards Tar and Gravel ^^i
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