Lenticular Truss Bridges
Lenticular truss bridge is named after its unique structure that combines upper parabolic chord and lower opposite curved one together shaping like a lense, also called "fish belly truss" from another poetic imagination the shape raises or "parabolic truss" or "elliptical truss" from very scientific observation. The last two namings were common in the 19th century.
|Location||Boardman Road over Housatonic River, New Milford, CT|
|Type/Spans/Length||Lenticular Through Truss/1 span/188 feet|
|Condition||Bypassed by a new bridge, but still in use for pedestrians|
|Registration, Award, etc||National Register of Historic Places (1976), the Historic American Engineering Record (HAER No. CT-16)|
|In Connecticut, the Berlin Iron Bridge Company who had built all of lenticular truss bridges by holding the patent as well as other types of iron ones in the last two decades of 19th century USA located its headquater and main workshop in the state, though, there are only three lenticular through truss bridges still remaining as of September, 2002. Out of the three lenticular trusses, New Milford has two and so I would call the town the mecca of lenticular trusses in Connecticut.
New Milford is in a two-hour drive away from Manhattan, NYC, 10 minutes from Danbury, CT. The road to the two lenticular trusses is rather easy to go on pilgrimage.
Boardman Bridge was biult in 1888 and "she" is an elder sister of New Milford's lenticular trusses.
Lover's Leap Bridge
|Location||Pumpkin Hill Road over Housatonic River, New Milford, CT|
|Type/Spans/Length||Lenticular Through Truss/1 span/173 feet|
|Condition||Bypassed by a new bridge and closed|
|Registration, Award, etc||National Register of Historic Places (1976), the Historic American Engineering Record (HAER No. CT-17)|
|Lover's Leap Bridge was biult in 1895 and "she" is a younger sister of New Milford's lenticular trusses. She looks stronger than her elder sister, Boardman Bridge, because she spans very high over the gorge and is painted red.|
Neshanic Station Bridge
|Location||Neshanic Station, NJ|
|Type/Spans/Length||Lenticular Through Truss/2 spans|
|Condition||In use for vehicular traffic and pedestrians|
|Registration, Award, etc|
Smithfield Street Bridge
|Type/Spans/Length||Twin 2-Span Lenticular Through Trusses|
|Condition||In use for vehicular traffic and pedestrians sustaining heavy traffic between the downtown Pittsburgh and its suburb|
|Registration, Award, etc|
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