MARTA CF310

The project consists of 7,570 ft. of aerial structures extending along the Rapid Rail Line to Dunwoody Station, north of Atlanta.

The structures carry two trackways and utilize two superstructure cross-sections, a 30ft.-3in. wide single box girder cross-section that carries both tracks and 17ft.-3in. wide dual box girders that carry one track each. The span lengths for the deep box girders vary from 90 ft. to 140 ft. with a total deck area of 173,100 sq. ft.

The superstructure is supported by 56 cast-in-place piers varying from 25 ft. to 50 ft. in height bearing on 100 ton steel “H” piles, with the exception of six piers that were founded on rock. The project is located in Dekalb County on the north side of the metro Atlanta area. The right-of-way transects several high-end commercial properties and the Georgia DOT.

The contract required no fewer than 39 temporary easement activations sequenced throughout the construction schedule. Construction was activated by 6 notice-to-proceeds issued by MARTA, with 111 interim completion dates, scheduled within the 24 month contract time.

The structures were released to MARTA in June 1995, six months ahead of schedule.