Videos of Historic Iron Truss Relocation

Bridge 5721, originally built in the 1870s and one of Minnesota's only iron (not steel) truss bridges, was disassembled in 2009 at its northern location in Koochiching County. The truss members were refurbished and reassembly began last fall at a new site east of St. Paul in Washington County. Newly renumbered as Bridge 82524, it will carry pedestrian, bicycle, and equestrian traffic on a trail over Manning Ave. This spring the truss will be lifted into place over the road.

Two videos document parts of the disassembly and reassembly process. Instead of modern bolts, hot rivets were used experimentally to reassemble a few connections. The riveting is seen in the second video (see next blog).

See Mn/DOT's web page on this and other historic bridge projects: http://www.dot.state.mn.us/historicbridges/2010and2011.html

Courtesy of guest blogger -- Bob Frame

Category:

People & Blogs

Tags:

• historic
• preservation
• mead & hunt
• bridge