Completed in 1926 after four and a half years of construction, the steel suspension bridge spans over Delaware river, connecting Philadelphia to Camden NJ. The main span is 533 meters long and its center point is 41 meters over the river surface. The bridge was designed by Paul Philippe Cret and engineers Ralph Modjeski and Leon Moisseiff made sure the design would actually hold together. Named originally The Delaware River Bridge it was the world's longest suspension bridge at time of its completion and held the title for three years until surpassed by the Ambassador bridge in Michigan. The bridge's deck carries seven road lanes, two rail tracks and two pedestrian lanes. The deck is hold up by two 30 inch (~76cm) thick cables that consist of 18,666 individual wires, each. The steelwork weighs about 61,700 tonnes and the whole structure including the anchoring points and approaches, about 720,000 tonnes. Many thanks for Matt @ Google for providing me the photographs.
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