Engineering and Contracting . e forms are filled and removed before the wall up higher, being used again on another sump as 31 soon as they are taken away from the first one con-structed. The illustration shows the ateel forms filled with con-crete for the construction of one of these sumps. Thesystem of liners holding the forms rigidly in position iswell shewn, and it will be noted that on the overhang-ing wall the liners are bent so as to produce a wall ofexactly the right profile. The forms used on this work are, with the exceptionof the specials provided for the inter
Engineering and Contracting . e forms are filled and removed before the wall up higher, being used again on another sump as 31 soon as they are taken away from the first one con-structed. The illustration shows the ateel forms filled with con-crete for the construction of one of these sumps. Thesystem of liners holding the forms rigidly in position iswell shewn, and it will be noted that on the overhang-ing wall the liners are bent so as to produce a wall ofexactly the right profile. The forms used on this work are, with the exceptionof the specials provided for the intersections, strictlystandard light wall forms, adjustable for use on all plainwall work, where the height poured at any one time doesnot exceed 10 ft. These forms are attached to the linersbefore they are erected and may be shifted either in units2 ft. wide and 10 ft, 12 ft.,or 14 ft. long, as desired, with thehorizontal liners attached, or in larger units with the ver-tical liners attached, in which case it is necessary to em-. Steel Forms for Tank Walls. ploy a derrick to handle the form on account of theweight. The form weighs about the same per square footof surface as a well-made wooden form, but occupies lessspace and has much greater stiffness. On this particular job the forms used in the sumpswere shifted by the derrick in units 12 ft. wide by 8 or 96 sq. ft. to a unit, similar units being used inthe upper sections. In shifting these large units, theyare picked up by the derrick and swung around into anew place wherever desired, necessitating little handling. COST OF THE CITY TUNNEL OF THE CATSKILLAQUEDUCT, NEW YORK WATER SUPPLY.* The city tunnel is 18 miles in length from Hill Viewreservoir to the terminal shafts in Brooklyn, and its fin-ished diameter is 15 ft. for the first 8 miles reducing fromthis size by successive decrements of 12 in. to 11 ft. inBrooklyn. Of the 24 shafts through which the tunnelwas constructed, 22 were built as waterway shaftsth
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
