Engineering and Contracting . 1 dumpman at $ 1 3-mule snatch at $ 1 3-mule snatch driver at 1 D. R. at 3 per cent per month Foreman at $ Waterboy at $ Value of scraper $ Value of harness Total $ 1 ftr scraper 1 rC. D. (1 + 1/k) 1C1 1 r; = • w . 0 = S •+? W 1 -A 209X600 ?-I- 1000. 1 1 [ 1 1 — 1 v> + 2 30 1 600 1 w 1 . -Costs. \ w. D = 100 500. 1000. .30 JO 90 .35 .40
Engineering and Contracting . 1 dumpman at $ 1 3-mule snatch at $ 1 3-mule snatch driver at 1 D. R. at 3 per cent per month Foreman at $ Waterboy at $ Value of scraper $ Value of harness Total $ 1 ftr scraper 1 rC. D. (1 + 1/k) 1C1 1 r; = • w . 0 = S •+? W 1 -A 209X600 ?-I- 1000. 1 1 [ 1 1 — 1 v> + 2 30 1 600 1 w 1 . -Costs. \ w. D = 100 500. 1000. .30 JO 90 .35 .40 .45 costs. The time Waiting and Preparing toLoad is altogether too high. The speed KSon the return is less than S loaded this state of affairs exists it can in-variably be traced to too many scrapers, foithey become bunched about the loading pointand the returning drivers, seeing this, slowdown, thus wasting considerable time. D/S(.t+l/k)+l In the formula, R^C. ?— IV. W. Fig. 4. Device Permitting Lateral Play ofPole in Wheel Scraper Work. •11 the quantities may have fixed values deter-mined from observation assigned to thcin, ex-cept W and D, the and haul, which willvary according to the kind of scraper em-ployed and the nature of the work. Table VI gives the results of a large numberof observations under these conditions. The observations of Table VII were madewhere the material was a mixture of sand andloam, without enough of the latter, however,to lend stability to the whole. Boulders werenumerous, often interfering with the obtain-ing of good loads. The above costs are a good example of howconditions affect results, and the above meth-od of analysis readily shows this. The staticcost, cts. per cubic yard, is somewhatabove the average, due partly to the bouldersmaking loading difficult, and partly to thesmall loads carried to the dump. But it is thehigh transportation cost which attracts atten-tion. This vNas due
Size: 1958px × 1277px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
