First -Third Series of Selected Papers Read Before the Engineering Society of the University of Michigan. 1882-83--1884-85

First -Third Series of Selected Papers Read Before the Engineering Society of the University of Michigan. 1882-83--1884-85

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 edition. Excerpt: ...building sand, and three parts of broken stone (pieces not over 2" cube), shall be laid seven inches deep or enough to bring its finished surfare to conform to the crown and slope of the finished pavement, and eight and a half(8) inches below it. The concrete shall be thoroughly compressed while setting, by ramming or by rolling with as heavy rollers as it will stand. Sand.--When the concrete has set, a layer one-half (Q) inch deep of clean sand shall be spread evenly over it, and rolled smooth. On this shall be set the blocks of the superstructure. Superstructure.--To be of good, sound oak blocks, rectangular in form, three (3) inches thick, eight (8) inches deep (along the grain) and not less than five (5) or more than fourteen (14) inches wide. All blocks shall have injected (by any process which also thoroughly seasons the wood) not less than six (6) pounds per cubic foot, of dead oil of coal tar commonly called creosote oil. The blocks shall be set with the grain vertical and the three (3) inch dimension lengthwise of the street, as close together in both directions as they can be set. On top of the blocks, as soon after being laid as they are inspected and accepted by the proper oflicer, a coating of clean, sharp, fine sand shall be laid, and all the tratfic kept off till at least ten (10) days after the concrete is laid. When ready to be thrown open for use a wood roller of eight to ten tons weight shall be run all over the surface and the sand which is not crushed into the top of the blocks swept ofl.. Such a pavement will fulfill most if not all the conditions We have laid down. In a sanitary point of view it is safe, for the blocks being close together afford no lodgment for filth, and being full of the oil no liquid filth...show more

Product details

  • Paperback | 50 pages
  • 189 x 246 x 3mm | 109g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123674554X
  • 9781236745545