Engineering and Contracting . asingle-drum mine hoist; a 9-cu. ft. gasoline-driven mixer with a self-loader; a 3-cu. mixer; fa total amount expended for petty tools andrepairs for this job was $1,642, and thesetools will likely invoice at about $200, show-ing a depreciation of 87 per cent, which per cent of the pay roll. EXCAVATION WORK. Most of the excavation for the land pierswas done by slip and wheel scrapers, andwas kept trimmed up with pick and an average eight to ten teams were em-ployed during the progress of this convenient, the excavated
Engineering and Contracting . asingle-drum mine hoist; a 9-cu. ft. gasoline-driven mixer with a self-loader; a 3-cu. mixer; fa total amount expended for petty tools andrepairs for this job was $1,642, and thesetools will likely invoice at about $200, show-ing a depreciation of 87 per cent, which per cent of the pay roll. EXCAVATION WORK. Most of the excavation for the land pierswas done by slip and wheel scrapers, andwas kept trimmed up with pick and an average eight to ten teams were em-ployed during the progress of this convenient, the excavated materialwas placed back of the abutments to aid informing the approach fills. The surface soilwas black, heavy loam, and when thoroughlydry it was quite hard and would maintain avertical surface for 15 or 20 ft. without show-ing any signs of caving. The excavation for the river piers wasmostly done by pick and shovel, being handledin the dirt buckets by the derrick boom. Ontwo piers near the banks of the river a clara- 50^.. ^-?4i- E&CCc) Section A-A Fig. 3. (a) PlanPlan, Elevation and Cross-Section of Typical River Pier—Fort Worth Viaduct. leads and a 2,500-lb. drup-hammer whicli wasoperated from the lx>om of the derrick; two1-cu. yd. turn-over dirt buckets and a clam-shell bucket; and two pumps, onesteam-driven and the other small mixer was used to mix the con-crete used in the railing at the opposite endof the bridge from the main plant, whichmade it unnecessary to operate the main plantfor the small amounts of concrete requiredfor that work. As shown on the general ele-vation (see Fig. 1) the chuting plant wasmoved twice, the second move being back tothe first location. In addition to the above mentioned equip-ment there were the usual petty tools andsupplies for a job of this kind, on which de-preciation is not far from 100 per cent. The shell l)ucket was used to advantage untilgravel was reached. The piers were carriedapproximately 12 ft
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
