Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

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ww.EasyEngineering.nDownloaded From : www.EasyEngineering.netSlipforms 427FIGURE 15-11 ARCO II Building in Denver, Colorado: 544-ft-high slipformedelevator shaft. (Source: Sundt Corporation)Downloaded From : www.EasyEngineering.net
428 Chapter FifteenDownloaded From : www.EasyEngineering.netFIGURE 15-12 Slipform core of 785 ft for Two Liberty Place in Philadelphia,Pennsylvania.ww.EasyEngineering.nstarted and stopped each day and on weekends to avoid the highcosts associated with continuous operations. Workers, equipment,and material delivery are planned to permit a production rate of onestory height of walls per day. Figure 15-12 shows Two Liberty Place inPhiladelphia, Pennsylvania. This structure is the world’s tallest slipformcore, a total height of 785 ft.Linings for ShaftsSlipforms have been used to place the concrete linings for verticalshafts for tunnels and missile launching bases. The linings for the latterfrequently must be constructed to tolerances of ¹⁄8 in.Figure 15-13 shows a section through the slipforms used to placeconcrete linings in vertical shafts located in White Sands, New Mexico,Victorville, California, and Helms Creek, California. These shaftsranged in diameters from 33 to 48 ft and in depths from 200 to over400 ft. Special cable lifting jacks were used both to lower the slipformsDownloaded From : www.EasyEngineering.net
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38 Chapter ThreeExample 3-7A floor
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120 Chapter FiveExample 5-12Class I
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Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

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