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