Congressional Serial Set Volume 1981

Congressional Serial Set Volume 1981

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Description

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. 1881 edition. Excerpt: ...plates of the ship bear the same relation to the sides of the ship that the mass of metal at the top and bottom of the beam does to the vertical part of the beam. A central bulkhead is sometimes placed through the middle of the ship, fore and aft. to increase her strength. As the deck of the ship has several openings that are absolutely necessary, the deck plates are made heavier than the sides of the ship, for the purpose of getting the necessary amount of iron in the deck. Their thickness is in proportion to the strength of the plates in the bottom. Increasing the strength of the deck plates over the gunwales of the ship aids also to resist the lateral strain caused by a wave suddenly striking one side of the bow or stern of the ship. All material used in the construction of ships and bridges is elastic. Iron is so elastic that the stirl'estbridgegirders, if of a length and depth equal to that of the largest ocean steamer, will bend under a heavy load with perfect safety as much as six inches. In testing one of the bridges at Cincinnati, which has a span of only 4(10 feet, the load caused it to bend nearly six inches. I speak from memory. On the Saint Louis bridge, which isa steel one, a load of fourteen locomotives and tenders, which was all I could borrow for testing the bridge, caused a deflection of more than three inches in the largest arch, which has 520 feet clear span. If the material in the arch had been used in the form of a girder, of equal depth and strength, the same load, which was between five and six hundred tons, would have deflected it six inches without injury. I know of no material used in construction so hard as to be non-elastic, and I doubt if there is anything in nature so hard that it will not change its form under...show more

Product details

  • Paperback | 416 pages
  • 189 x 246 x 22mm | 739g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236611640
  • 9781236611642