Proceedings of the Short Course in Highway Engineering Volume 1-4

Proceedings of the Short Course in Highway Engineering Volume 1-4

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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. 1915 edition. Excerpt: ...this class that is encountered on a job is usually small, and after being broken, should be handled by wheelborrow if the haul is less than I00 feet, and by cars if the haul is over this distance. However, if the amount was large, the car and track proposition would be the best at any distance. Often on this kind of work, the men can handle their own car, thereby eliminating the cost of having horses standing around while loading is in progress. The writer has no personal data on the actual cost on loose rock excavation, but by using, as a basis, the different prices paid for this class of work, on a number of contracts, it would be reasonable to place those figures at fifty cents per yard. There is usually some difference between contractor and engineer as to just what loose rock is, and while our specifications are usually clear on this point, we frequently find the contractor howling for solid rock prices for loose rock excavation, and it would be hard to lay down any law that would eliminate this trouble entirely. CLASS FouR--SoL1D Rocx. As a general rule our surveys as near as possible, avoid rock cuts, there are times when it is absolutely necessary to do more or less of this kind of work, in order to adhere to line and grade or to attain some desired point. It is apparent that before attempting to set down any figures as to the prices paid for the excavation of solid rock, we must first go into a classification, inasmuch as the rocks in the various localities differ as to their hardness and toughness. We will subdivide this as follows: A--the various limestones, B--the various traps and C--the various granites and churts. In computing the amount of powder necessary for a given piece of work, it is the experience of the writer that...show more

Product details

  • Paperback | 326 pages
  • 189 x 246 x 17mm | 585g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236843061
  • 9781236843067