Drawing courtesy of Rensselear Polytechnic Institute

The Allegheny Aqueduct Bridge



Location of bridge: Pittsburgh Pennsylvania

Bridge spans: Allegheny River

Construction Commenced: 1844

Construction Completed: 1845

Chief Engineer: John A. Roebling

Bridge Constructor: John A. Roebling, Co.

Wire Rope manufacturer: John A. Roebling, Co.

Bridge Type: Suspension

Dedication Date:

Bridge opened to vehicles: (date)

Bridge opened to passengers : (date)

Length of main span: 162 feet

Length of side spans:

Length of approach:

Total length, including approaches:

Overall width:

Total weight of bridge

Height of bridge at center of span:

Weight of bridge (minus cables):

Estimated total cost:

Actual total cost:

Still extant?: No


Towers, Anchorages, Foundations and Masonry

Height of towers:

Size of anchorage at base:

Size of anchorage at top:

Weight of each anchor plate :


Cables

Number of supporting cables: 2

Diameter of each cable: 7 inches

Length of each single wire in cables:

Diameter of each single wire in cables: 0.148 inches

A cable contains 7 strands, containing 236 wires at a total of 1652 wires in each cable.

Ultimate strength of cable:

Weight of cables:

Weight of bridge (-cables)