By Nick Gilbert
Composite Advantage (CA) has announced that a novel three span steel superstructure located at Wolf Creek National Park adjacent to Vienna, was installed with FiberSPAN fiber reinforced polymer (FRP) bridge deck.
Wolf Trap Bridge
This new bridge for pedestrians was specifically designed to promote safe crossing on the 10-lane Dulles Access and Toll Road and to link two key facilities constructed at the Wolf Trap Performing Arts Center.
A narrow road having a crumbling sidewalk has isolated the Barnes and Filene Center. This sidewalk raised safety issues for approximately 500,000 people, who visit the park every season.
Steel trusses that are fitted with composite bridge deck, measuring 8,000 sq. ft. are designed to withstand heavy traffic comprising patrons, pedestrians cyclists, and residents who require access to the Metro stations, which are presently being built at Tysons Corner.
The company’s new sandwich construction was specifically used in the manufacturing of the FRP bridge deck. This new construction includes closely-spaced internal webs, functioning similar to a sequence of I-beams, and fiberglass top and bottom skins. An epoxy aggregate non-slip coating and curbs were molded with the 8.3 x 15.5 ft. panels. The color of the deck was matched with the truss coating.
The lightweight prefabricated panels can be used for construction during night time, so that public interruption during the construction operations can be reduced.Every truss span near the bridge location was installed with the FRP deck. The deck’s lightweight nature allowed the lifting of the fully assembled truss span onto the highway. Each span was erected in just 15 min.
Each bridge span was specifically raised into position for three successive nights, with the largest bridge span weighing 140,000 lbs and measuring 170 sq. ft.