Smithfield Street Bridge

Smithfield Street Bridge
Pittsburgh


End on

Pittsburgh's Smithfield Street Bridge, designed by Gustav Lindenthal, is the best-known and most spectacular lenticular-truss bridge in the United States. It was completed in 1883 at half of its current width, but an additional set of trusses was added in 1891, doubling its size. For years it carried streetcars as well as autos. It is currently limited to vehicles of no more than 23 tons.

» The Historic American Engineering Record report on the Smithfield Street Bridge includes excellent black-and-white photos from 1974, plus drawings.

» Postcards and photos showing the bridge's original portals are also online. The current portals, fashioned from cast steel, date to 1911.


Interior

 

Pin connection

 

Under eyebars

 

Eyebar curves

 

Eyebars

 

Lattice post

 

Figure

 

Courthouse

The tower of H. H. Richardson's Allegheny County Courthouse,
framed by trusses of the approach span on the east side.


Barge

 

July, 2003


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