Reinforced Concrete Construction; Prepared in the Extension Division of the University of Wisconsin

Reinforced Concrete Construction; Prepared in the Extension Division of the University of Wisconsin

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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. 1916 edition. Excerpt: ...were laid longitudinally and at vertical distances apart of approximately 5 ft. and consisted of 4 X 4-in. and 4 X 6-in. timbers. The bottom forms were secured to the structuralsteel frames which comprise the reinforcing for the ribs, by means of pairs of f-in. round bolts spaced every 12 ft. At these points 6 X 8-in. timbers were placed, supported by the bolts just mentioned, and running transversely from outside rib to outside rib, their purpose being not only to support the bottom forms but also to brace the steel ribs together until the concrete cross beams were cast. The shape of the intrados of the ribs was segmental, relieved by little three-centered fillets at the ends. The forms for these fillets were made up in advance and were supported by the bolts at the ends of the segmental curve. "We employed two types of steel ribs both built up of structural angles, but those for the concrete ribs, 24 in. in width, were made of box section and those for the intermediate concrete ribs were of I-section. My experience was that it was possible to get much better results with the wider beams because, owing to the fact that there was a 12-in. space between the angles of each flange, it was possible to pour the concrete into the middle of the rib; whereas in the narrow ribs the concrete while being poured was divided by the top chord into two parts which followed down the two sides of the rib, with the result that there was considerable difficulty encountered in preventing separation of the materials. I also found that it was inadvisable to use lattice bars on compression members, for in places where latticing was not used, but battens instead, the placing of the concrete was very much facilitated." CHAPTER XVIII REINFORCED CONCRETE IN STEEL...show more

Product details

  • Paperback | 132 pages
  • 189 x 246 x 7mm | 249g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236504097
  • 9781236504098