Engineering and Contracting . llBor. Sleeve Nut Tor m No I set up for first Layer First Layer ofof Concrete ? - ^?- - ^W^^m^ MM^t^: *• ? 7-/0 >^-5W-—J-O^ rormNaS setup for Second Layerof Rirm NoSset Third Loyer rorm No3 set Fourth loyerof Cone Concrete in Place Second louerofConc Cone in place ond upfor third Loyer of cone in place upfor fourth formNoZrenaoved of Concrete formNo3pulled loyerofconc pulledoffwallreadr lifted tobelifted Fig. 25. Diagram Showing Operations in Using Wall Forms at Pedro Miguel and Miraflores Locks. gate recesses

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Engineering and Contracting . llBor. Sleeve Nut Tor m No I set up for first Layer First Layer ofof Concrete ? - ^?- - ^W^^m^ MM^t^: *• ? 7-/0 >^-5W-—J-O^ rormNaS setup for Second Layerof Rirm NoSset Third Loyer rorm No3 set Fourth loyerof Cone Concrete in Place Second louerofConc Cone in place ond upfor third Loyer of cone in place upfor fourth formNoZrenaoved of Concrete formNo3pulled loyerofconc pulledoffwallreadr lifted tobelifted Fig. 25. Diagram Showing Operations in Using Wall Forms at Pedro Miguel and Miraflores Locks. gate recesses in the side walls and conse-mientlv thicker walls. Many other matterswere given separate study. The selection madewas a girder gate leaf of the general designshown bv Fig. 2i>. i ? w The leaves, as stated above, vary in licigiit,but are uniformly 7 ft. thick and (ij ft. frame or skeleton consists ot horizon-tal girders spaced from 3% ft. to o ft. apart;of Vertical frames which extend the entireheight of the

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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19