| # |
Company name |
Headquarters
|
| 1
|
Keystone Bridge Company |
Pittsburgh, Pennsylvania
|
| 2
|
Wrought Iron Bridge Company |
Canton, Ohio
|
| 3
|
Berlin Iron Bridge Company |
Berlin, Connecticut
|
| 4
|
Pencoyd Iron Works |
Philadelphia, Pennsylvania
|
| 5
|
Union Bridge Company |
Athens, Pennsylvania
|
| 6
|
Groton Bridge Company |
Groton, New York
|
| 7
|
Pittsburgh Bridge Company |
Pittsburgh, Pennsylvania
|
| 8
|
Youngstown Bridge Company |
Youngstown, Ohio
|
| 9
|
Carnegie Company |
Pittsburgh, Pennsylvania
|
| 10
|
Post & McCord |
Brooklyn, New York
|
| 11
|
J.B. & J.M. Cornell |
Cornell, New York
|
| 12
|
Elmira Bridge Company, Limited |
Elmira, New York
|
| 13
|
American Bridge Works |
Chicago, Illinois
|
| 14
|
Edgemoor Bridge Works |
Edgemoor, Delaware
|
| 15
|
Lessig Bridge and Iron Works |
Chicago, Illinois
|
| 16
|
Shiffler Bridge Company |
Pittsburgh, Pennsylvania
|
| 17
|
Detroit Bridge and Iron Company |
Detroit, Michigan
|
| 18
|
Rochester Bridge and Iron Works |
Rochester, New York
|
| 19
|
J.G. Wagner and Co. |
Milwaukee, Wisconsin
|
| 20
|
Toledo Bridge Company |
Toledo, Ohio
|
| 21
|
Gilette & Herzog Manufactering Company |
Minneapolis, Minnesota
|
| 22
|
Lafayette Bridge Company |
Pittsburgh, Pennsylvania
|
| 23
|
Schultz Bridge and Iron Company |
Pittsburgh, Pennsylvania
|
| 24
|
Buffalo Bridge and Iron Works |
Buffalo, New York
|
| 25
|
Canton Bridge Company |
Canton, Ohio
|
| 26
|
Bellefonte Bridge and Iron Company |
Bellefonte, Pennsylvania
|
| 27
|
Coke and Iron Works |
St. Louis, Missouri
|
| 28
|
Hilton Bridge and Construction Company |
Albany, New York
|
| 29
|
Horseheads Bridge Company |
Horseheads, New York
|
| 30
|
Columbia Bridge Company, Successors to Columbia Bridge Works of Dayton, OH |
Pittsburgh, Pennsylvania
|