Benjamin Franklin Bridge

39.952777777778 - 75.134166666667Koordinaten: 39 ° 57 '10 " N, 75 ° 8' 3 " W

F1

Interstate 676, U.S. Route 30, PATCO Speedline

Delaware River

The Benjamin Franklin Bridge ( often called the Ben Franklin Bridge ), originally the Delaware River Bridge, a road and railway bridge that spans the Delaware River and Philadelphia, Pennsylvania Camden, New Jersey is connected. Along with the Betsy Ross Bridge, the Walt Whitman Bridge and Tacony - Palmyra Bridge is one of the four main bridges between Philadelphia and the southern part of New Jersey.

When it was completed on July 1, 1926 had the longest span suspension bridge in the world, this record she held until completion of the Ambassador Bridge in 1929.

It was named after the American statesman Benjamin Franklin.

Description

The Benjamin Franklin Bridge now has 7 lanes; wherein the middle lane can be correspondingly assigned to the traffic by means of movable barriers of one or the other direction. Currently, Interstate 676 and U.S. Highway 30 run over the bridge. Add a westbound toll in the amount of U.S. $ 5 is charged for cars that can be paid for with the E- ZPass. On both sides of the bridge is on a lower level of the PATCO Speedline and above depending on a walkway above the level of the roadway per one track of which usually only one is open. After the attacks in London on 7 July 2005, the footpaths were for a time blocked for security reasons. The bridge has a clearance height of 41.1 m (135 ft) above MHW, a height dimension that was originally set by the Brooklyn Bridge, and since then is true for most bridges in the wider area.

Technical details

The bridge, including all access roads almost three kilometers long. The bridge itself is - in terms of anchor block to anchor block - 1078 m ( 3536 ft ) long. Of this, 533.4 m (1750 ft) on the span of the main span and the 272.2 m ( 893 ft) on the two side openings. The bridge is 39 m (128 ft) wide, including walkways and railway tracks on the lower deck. The siebenspurige road is 23.7 m (78 ft) wide and is framed by the 8.5 m high stählerenen truss stiffening of the support forming an upwardly open trough. The anchor blocks have a floor space of over 2000 sq m, 53 m rise above the ground and extend to a depth of 20 m on one side and 32 m on the other side.

The 117 m (385 ft) towering pylons stand in front of the shore line in the water. Your steel stems have a multicellular hollow cross section and are repeatedly reinforced by horizontal and diagonal cross braces. The two 76.2 -cm-thick suspension cable run above the truss. They each consist of 18,666 individual wires which have been processed in an air -spinning method to parallel ropes.

History

In December 1919 Pennsylvania and New Jersey, founded the Delaware River Bridge Joint Commission, which commissioned as Chief Bridge Engineer Ralph Modjeski with the planning and construction management of the bridge. Leon S. Moisseiff who had applied the further developed by him Deflektionstheorie at the Manhattan Bridge, was also consulted. The actual construction began on January 6, 1922 and ended on 1 July 1926. At the time the bridge had five lanes and and two tram tracks in the road carrier and the two tracks outside of the truss, which were long but not used.

1951, the Delaware River Port Authority was established, which has since (even ), the Benjamin Franklin Bridge operates. To accommodate the increased volume of traffic they removed the two inner tracks and built the road to seven lanes.

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