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Jacking Tower in Action


Engineering News Record
September 29, 2008

Piece By Piece, Barrel Arches Fit Together in New Jersey

"With subcontractor Structural Services ... [Conti] elected to lift and rotate the precast units into position in one step, rather than the traditional two-step process that requires units to be maneuvered horizontally and vertically. 'This helped speed the erection process and eliminated the need for a second crane...'"

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Precast Solutions
Spring 2009

Bridging Past and Present

"...the design required erection of a minimum of four arch pieces in order to be a self-supporting and stable arch system. After several meetings with project team members, it was determined that steel towers on wheels would be used under the first two arch segments for support, and once the four arch segments were erected, the system would be stable. Once stable, the towers on wheels were removed and a single crane could be used to erect the other 12 arch segments. The erection technique saved substantial time and money, enabling eight arch pieces to be erected each day."

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