Water Supply, Sewerage, Purification of Water, Sewage Purification and Disposal, Irrigation

Water Supply, Sewerage, Purification of Water, Sewage Purification and Disposal, Irrigation

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ...pipes then carry the flow down and around a bend, which can be about 30o, to the main sewer. The elbow is built into the bottom of the manhole, and the flow line continued in the brick or concrete. This construction 136--21 is faulty if the space X is so large as to allow the pipe C to settle and break away from the T. Special care must be used in tamping the earth back in the hole X; if obtainable, sand settled in water is the best material for such purpose. The opening M serves for inspection and cleaning. 9. For sewers larger than 10 inches, especially if two laterals meet in the same manhole, the preceding construction would take up too much room in the manhole, or necessitate a very large manhole. Under such conditions, the vertical pipes are brought down on the outside, as shown in Fig. 9. As before, the T pipe C must be carefully supported and the elbow at the bottom should be buried in concrete to carry the weight of the vertical pipe. From the lower end of the elbow E to the main SWjl2-a sewer S, the channel is made in the concrete. 10. Manholes for Ltarge Sewers. Sewers 3 feet or more in diameter are large enough to be entered, and curves of long radius may be used. Manholes are necessary only to provide access to the interior, and will generally rest with their walls directly on the arch of the sewer. For sewers up to about 6 feet in diameter, the manhole should be symmetrical with respect to the center line of the sewer, as shown in Fig. 10 (a); for larger diameters, the manhole may be built on one side, with one wall of the manhole tangent to the side of the sewer, as shown in Fig. 10 (b). 11. Lamp Holes and Fresh-Air Inlets.--For pipe (a) Fig. 10 (b) sewers, where the distances between manholes is considerable, the means of...show more

Product details

  • Paperback | 152 pages
  • 189 x 246 x 8mm | 286g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236602277
  • 9781236602275