Infrasense Evaluates Precast Concrete Box Girders of Rhode Island Bridge Decks Share Article Infrasense recently evaluated the lower flange thicknesses of precast concrete box girders supporting two bridges in Hopkinton and Warwick, Rhode Island. The purpose of this testing was to determine whether the flange thicknesses were consistent with the design plans. Surveys were carried out on the undersides of each bridge using ground penetrating radar (GPR). WARWICK, R.I. (PRWEB) February 19, 2021 Infrasense recently evaluated the lower flange thicknesses of precast concrete box girders carrying Potter Hill Road and Airport Connector Road bridge decks in Hopkinton and Warwick, Rhode Island. The purpose of each survey was to determine whether the flange thicknesses were consistent with the design plans for each box girder. Each survey deployed ground penetrating radar (GPR) from the underside of the bridge. The Potter Hill Road bridge crosses the Pawtucket River, requiring a motorized boat to access the lower flanges for data collection. The Airport Connector Road bridge is located at T.F. Green Airport, where a boom lift was utilized during data collection.