| Key Facts |
| Bridge Name | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date / Builder or Contractor |
| 6th Street Bridge
Roberto Clemente Bridge | 6th Street Over Allegheny River | Pittsburgh: Allegheny County, Pennsylvania | Metal Through Plate Girder Stiffening Eyebar Suspension, Stationary | 1928 By: American Bridge Company of New York, New York |
| Technical Facts |
| Structure Length | Roadway Width | Span Between Towers | Total Suspended Length | Minimum Vertical Underclearance | Navigation Vertical Clearance | Main Spans | Approach Spans |
| 995 Feet (303.3 Meters) | 38 Feet (11.6 Meters) | 430 Feet (292.6 Meters) | 960 Feet (11.6 Meters) | 0 Feet (4.36 Meters) Over Highway | 0 Feet (12.1 Meters) | 1 | 2 Steel Stringer |
The Sixth Street Bridge is one of three identical bridges that sit by side and are known as the "Three Sisters Bridges." They are unusual bridges due to the fact that instead of having cables, they use eye-bars. This gives them quite a different appearance from the average cable suspension bridge. Stiffening for the bridge is accomplished by through plate girders. They were the first examples of self-anchored suspension bridges, meaning the towers are rigid, and they hold the eye-bars, so no anchorage is needed.
