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Florida Marlins Ballpark Workers with LPR Construction, Loveland, Colo., recently began jacking the roof trusses off their shores for the retractable roof of the $515-million Florida Marlins Ballpark in Miami. To accommodate the anticipated 10 in. of vertical and 6 in. of simultaneous horizontal deflection as the shore loads are removed, the roof panel was erected onto skewed ramps atop the shoring tower structure with construction rollers between the ramps and the trusses. LPR devised a method of rolling the roof panels down the ramps while the transporters moved along at the same pace. The eastern structural panel, erected on shores last fall, is 65 ft wide, spans 533 ft and weighs 1,200 tons.