Parks and park engineering . ed about 6 or 7 feet deep,4 feet inside diameter, corbeled in at the top to a diameterof 2 feet. The cast-iron grating is rectangular for pavedgutters and circular for grass gutters. Its height is about8 inches. It is cast in two pieces—the lower part providedwith a flange to rest upon—and a grating to hold backobstructions. A catch-basin is provided with a concretefoundation about 6 inches thick. The invert of the outletpipe, which is 6 inches in diameter, is about 3 or 4 feet fromthe bottom. No outlet trap is provided, the purpose ofthe catch-basin being merely t
Parks and park engineering . ed about 6 or 7 feet deep,4 feet inside diameter, corbeled in at the top to a diameterof 2 feet. The cast-iron grating is rectangular for pavedgutters and circular for grass gutters. Its height is about8 inches. It is cast in two pieces—the lower part providedwith a flange to rest upon—and a grating to hold backobstructions. A catch-basin is provided with a concretefoundation about 6 inches thick. The invert of the outletpipe, which is 6 inches in diameter, is about 3 or 4 feet fromthe bottom. No outlet trap is provided, the purpose ofthe catch-basin being merely to catch mud and gravel andprevent its entrance into the sewer. Instead of placing two catch-basins on opposite sides ofa path or drive, it is often well to dispense with one andbuild an inlet instead. The inlet discharges into thecatch-basin and the catch-basin into the sewer. Shouldthe inlet or its chute become stopped, it may be cleaned outby use of a garden hose. Catch-basins and inlets can be placed in paved gutters,. I 4 a s 3 -P. 6O a GJ ^ •/- c ^fc- L 2 — -> U 3 _jC C cc METHODS OF DISCHARGE 47 or off to one side of the path or drive in grass gutters, whichwill be discussed under the heading of Grading. The dis-tance apart is a function of the amount of water to becarried. Past experience has clearly demonstrated thatcatch-basins and inlets are frequently placed too far apartand almost never too close together. A spacing often usedis 125 feet. If a sewer carries water from a row of catch-basins alonga drive, the sewer should not be placed under the drive, butrather under grass or shrubbery, where it can easily bereached in case of trouble. -Grass Gutter ConcreteInlet r-2—r Qravel <
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishere, booksubjectparks
