Engineering and Contracting . eted Milwaukee Ave. Viaduct Shown in Background. intractors, the main one being that therejoHld he no interference with the operationI trains on the joint main tracks of the Chi->Re. Milwaukee & St. Paul and the Pennsyl-ania railroad companies, on the old mainacks of the Chicago & Northwestern com-^ny, on the tracks serving the .Adams Ex- (listribiitcd by means of push carts of t!-cii. .\ large part of the materia! wasdelivered to the mixer in wheelbarrows, fromcars located on tracks marked Track for Ma-terial, but a portion was brought to thevicin
Engineering and Contracting . eted Milwaukee Ave. Viaduct Shown in Background. intractors, the main one being that therejoHld he no interference with the operationI trains on the joint main tracks of the Chi->Re. Milwaukee & St. Paul and the Pennsyl-ania railroad companies, on the old mainacks of the Chicago & Northwestern com-^ny, on the tracks serving the .Adams Ex- (listribiitcd by means of push carts of t!-cii. .\ large part of the materia! wasdelivered to the mixer in wheelbarrows, fromcars located on tracks marked Track for Ma-terial, but a portion was brought to thevicinity of the mixer by teams, and was thentaken to the mixer in wheelbarrows. For work at the north abutment and at thetwo north spans a was placed on thenorth approach, the concrete being dischargeddirectly into place or distributed in push concreting the sidewalks and curbs on thesteel spans a %-cu. yd. mixer mounted onw-heels was used, the concrete being dis-tributed in wheelbarrows. Materials were de-. Fig. 15. Portion of MilwaukeeAve. Viaduct Showing Type of Con-struction. livered to these mixers in wheelbarrows, fromstorage piles in the street at each end of theviaduct. A portable saw mill was erected near thesouth approach. Electric power was used inoperating the mixers, the elevator, and thesaw mill. In the construction of Desplaines St. via-duct the concrete for both the substructureand superstructure was placed by means of atower and chute, as shown in Fig. 11, thechute being long enough to deliver concreteto any portion of the structure. Figure 14also shows the thin columns, the reinforcingin the cross-girders, and the completed Mil-waukee .Ave. viaduct in the background. Fig-ure shows a side view of this .structureafter it had been opened to traffic. In the Milwaukee .Ave. viaduct there areapproximately -1,000 cu. yds. of concrete lbs. of reinforcing steel, while in theDesplaines St. viaduct there are approximatelv? cu.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
