Expressway Centerpiece

by Gerard F. Fox, Partner in Charge; Howard Needles Tammen & Bergendoff, 333 7th Ave., New York, NY,
Walter Shark, Deputy Construction Manager; Howard Needles Tammen & Bergendoff, 333 7th Ave., New York, NY,
Herbert Globig, Chief Bridge Designer; Howard Needles Tammen & Bergendoff, 333 7th Ave., New York, NY,
Raymond J. McCabe, Principal Structural Engineer; Howard Needles Tammen & Bergendoff, 333 7th Ave., New York, NY,


Serial Information: Civil Engineering—ASCE, 1989, Vol. 59, Issue 3, Pg. 43-46


Document Type: Feature article

Abstract:

The center span of the Napoleon Bonaparte Broward Bridge, better known as the Dame Point Bridge over the St. Johns River at Jacksonville, Fla., is the country's longest cable stayed structure at 1,300 ft. Side spans are 650 ft, igh level approaches are 2,000 ft each, and there is also a 4,050 ft low trestle over an arm of the river. The bridge is the centerpiece of the 5 mile, $117 million Dame Point Expressway, the northeast link of the city's beltway. The main span structure consists of a roadway slab supported by concrete floorbeams framed into two longitudinal concrete edge girders, all poured in place. Each edge girder is supported by a plane of cables arranged in a harp configuration. One end of each cable is anchored in the girder, the other in the tower, which transfers loads to the foundations. The south pier is supported on 704 steel piles. The north pier footing sits atop a 33 ft deep tremie seal that set a record when 18,970 cu hd of concrete was placed in 47 hours. The center span was closed in July 1988, dedication was held in September, and the bridge scheduled for traffic early in 1989.

Subject Headings: Cables | High-rise buildings | Span bridges | Highways and roads | Girders | Cable stayed bridges | Steel piles

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