Engineering and Contracting . were dismantled and part of their Labor on roads and trails. Plant-Buildings, material . ..Buildings, labor Total Cableways, materialCableways, labor ... Total Machinery and machinery (lainTransporting machinei ?,? .Water tanks Total Total Plant Miscellaneous, material.!Miscellaneous, labor .. Total Gates, central jettings, piping, tower, labor. Total Excavation Concrete— Cement at Nacozari Transportation of cement Total Sand, screening and handlint:Sand, transportation .$0,306 ? .$0,758. .$0,462.
Engineering and Contracting . were dismantled and part of their Labor on roads and trails. Plant-Buildings, material . ..Buildings, labor Total Cableways, materialCableways, labor ... Total Machinery and machinery (lainTransporting machinei ?,? .Water tanks Total Total Plant Miscellaneous, material.!Miscellaneous, labor .. Total Gates, central jettings, piping, tower, labor. Total Excavation Concrete— Cement at Nacozari Transportation of cement Total Sand, screening and handlint:Sand, transportation .$0,306 ? .$0,758. .$0,462. , .$1,939 . 3,159. .$2,053. .$i).336. . . $5,937. TotalForms—Lumber .$2,287. gUblM-t fl -lg;^ to curve m ^^aioetl oy : No. Ugaugeeteel Vs -A Qt.^-lSX-lb. I. rolloJ to ,, Bupjiorting plu],^ -X 10<l8 2» 01 @ o O B Lenffth raeaKUPt-d OQ furve 8 3 E Length mtliadrcJ ou iurve flO 6 l~0 ^ ® I I B. 0 u;i-lb. I Fig. 2. Steel Forms for Constructing Huacal Dam, Mexico. the customary stud and sheeting type, to aheight above which the external struts bracingthe studding would have become inconveniently long. The upper 60 ft. of the dam wasbuilt with steel forms (Fig. 2). These werein units 9 ft. wide for the water face and8 ft. 3 ins. for the back face, and 12 ft. were generally used in threes, makinga block space for pouring concrete 27 ft. by12 ft. and of the width of the dam. No attempt was made to vary the radius ofthe back face forms to conform to increasingradius due to decreasing thickness of dam withheight. The forms were shaped to a compro-mise radius. The slight angle made by theadjacent forms, where not strictly conformingto the true radius, was imperceptible on thefinished work. The location of the dam andits commercial use did not warrant the in-creased cost of forms of variable radius whichwould have been necessary for precision ofshape.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
