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. 1876 Excerpt: ...strata around the dam leaky. For the same reason it is important to select a position in which the rocks are undisturbed by faults, slips, or other irregularities. A number of balks of fir wood are then carefully dressed to a square form and tapering towards one end, as shown in the figure. The amount of taper will of ...
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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. 1876 Excerpt: ...strata around the dam leaky. For the same reason it is important to select a position in which the rocks are undisturbed by faults, slips, or other irregularities. A number of balks of fir wood are then carefully dressed to a square form and tapering towards one end, as shown in the figure. The amount of taper will of course depend upon the radius of the sweep of the dam. The pieces may be dressed and fitted together at surface into the form of the required dam underground, and numbered before being taken down. According to the pressure to be resisted and the area of the dam, the pieces will be required longer or shorter, but a dam of the dimensions given in the figure will stand almost any pressure. Fig. 74.--Frame Dam, Elevation. Scale J in. = 1 ft. While the dam is heing put in, it will be necessary to insert several strong metal tubes, and to fit the tapered beams to the outside of these. Near the bottom is one--a, 5" or 6" diameter, large enough to allow the feeder of water to pass through, the second b, about 18" diameter, DAMS OF MASONRY. 81 or large enough for the ingress and egress of the workman, and a third about 1" diameter is sometimes placed near the top to allow of the escape of gas. 96. Fixing the Dam in Place.--All the materials being ready, the workmen build up the dam in its place; first covering its seat and walls with a thick layer of tarred flannel. The feeder of water is then conveyed by wooden pipes, "boxes," or "launders," to the inner sideof the lower pipe, through which it flows, leaving the whole back end of the dam dry. Wedges of fir 12" long, 2' or 3" wide, and 1" thick at the head, are then forcibly driven in from the back, between the timbers, commencing at the bottom and...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Used-Good. Good Hardback. Tidy copy; dark green cloth with black lettering on front board; lettering faded on spine; cloth worn on edges; foxing on free end papers; binding tight.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
