Massachusetts’ Oldest Movable Steel Truss Bridge Marks 10-Year Anniversary of Nation’s Largest Six-Span FRP Composite Vehicle Deck
Civil + Structural Engineer
AUGUST 31, 2023
The 140-year-old steel truss structure connects West Newbury, Merrimac and Haverhill residents as well as several Southern New Hampshire towns, making it one of Massachusetts’ most heavily travelled bridges. “It A typical concrete deck weighs 100 pounds per square foot, creating a deadload a historic steel truss span can’t tolerate.
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