Construction Methods & Equipment Volume 2

Construction Methods & Equipment Volume 2

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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. 1920 edition. Excerpt: ...results. The rest of the record shown in Form No. 2 illustrates that the service to this shovel was poor, as in an hour's time 10 minutes were lost in waiting for wagons. If time had not been lost for other reasons from 7 to?:45 there would have been lost time due to waiting for wagons. This shovel for the work it was doing should have been 'served with four more wagons. Attention should be called to the two records given of moving the shovel. The first one was done rapidly, namely in 3i/ minutes, while the second one consumed 7 minutes. This was due to the chain breaking in moving the first section of the platform. This meant that time was consumed in changing the chains from one section of the platform to another, which could have been prevented by having an extra chain with the shovel. With two chains the shovel was moved rapidly, with one chain much slower. The platform parting was another mishap due to the lack of an extra chain. The records here shown give the result of loading 81 wagons in an hour and 43 minutes, or an average of 47 in an hour. With a load of 9/10 of a cubic yard this means about 425 cubic yard excavated in a 10-hour day. This can be called a good day's work for a shovel of this kind, yet the record shows that during the 103 minutes, the shovel actually worked but 57 minutes, 19 minutes being consumed in moving, 10 minutes waiting for wagons, 5 minutes for blasting, 7 minutes for repairs and 5 minutes for oiling. If the contractor had given better service to the shovel 27 minutes could have been saved and possibly 30 minutes. This would have meant that at the same rate of operation at least 40 more wagons would have been loaded, making a rate of excavation of about 600 cubic yards in a 10-hour day, a handsome profit on a...
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Product details

  • Paperback | 122 pages
  • 189 x 246 x 7mm | 231g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236573714
  • 9781236573711