Engineering and Contracting . Fig. 1—Waterloo Trench Backfiller Operating Derrick for Hoisting Rock From Trench. have never seen a team that could handle a scraper under these con-ditions. There has been considerable work in the alleys here and wehave used this backfiller very successfully where it would have beenimpossible to use a team on account of the wldth of the alley, itbeing only 19 ft. between buildings. What I value the most Is the factthat we have the filler on the job all the time, wasting no time waiting. method. But on difficult work, and for short stretches where theteam would n
Engineering and Contracting . Fig. 1—Waterloo Trench Backfiller Operating Derrick for Hoisting Rock From Trench. have never seen a team that could handle a scraper under these con-ditions. There has been considerable work in the alleys here and wehave used this backfiller very successfully where it would have beenimpossible to use a team on account of the wldth of the alley, itbeing only 19 ft. between buildings. What I value the most Is the factthat we have the filler on the job all the time, wasting no time waiting. method. But on difficult work, and for short stretches where theteam would not be .available or would stand Idle a part of the time,machine work costs from 10 to 40 per cent of team or hand work. At Decorah, la., we used four machines, following two Austintrenches and five hand crews, the latter working largely in rock. At Rockwell City, la., we laid 13,600 ft. of 4-in. water main in a6-ft. trench in thirteen working days using two trench fillers, at acost of 1 ct. per foot for backfilling. The backfillers were hitchedtandem following the trench machine. In all difficult work it is absolutely essential that the hoist bemounted on a turntable so as to swing freely to the proper This makes it possible for the man with the scraper tonurse the rocks and hard places and accomplish the same workwith a light, portable machine that would require an exceedinglyheavy and large powered outfit of the rigid type. It has been ourobservation that there is a great tendency to make tren
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
