Poughkeepsie, NY, USA
The Mid-Hudson Bridge carries US 44 and NY 55 across the Hudson River between Poughkeepsie and Highland in the state of New York. At its opening on August 25, 1930, it was the sixth-longest suspension bridge in the world with a main span of 1500 feet (457 m) and two side spans of 750 feet (229 m) each. The bridge is 3,000 feet (910 m) long with a clearance of 135 feet (41 m) above the Hudson.
BTC conducted main cable investigation utilizing the BTC method for evaluation of the remaining strength and residual life of the main cables. This included:
• Wire sampling plan.
• Internal inspection of panels.
• Fracture based analysis of cracked wires.
• Probabilistic analysis of cable strength.
• Forecast of the strength of main cables.
• BTC performed the first identification of fracture toughness of the high strength steel bridge cable wire.