Project Summary

The Scott Covered Bridge was built in 1870 by Harrison Chamberlin and is the longest covered bridge residing entirely in Vermont at 276′ in length. The bridge is unusual as it consists of two different truss types within the same bridge, namely a two-span continuous Town Lattice Truss (originally built as a single span) and two simple span King Post Trusses. The bridge varies from typical covered bridges with the addition of four outriggers at the bottom chord of the trusses and has undergone numerous changes since it was constructed. Due to advanced deterioration and distortion in the bridge it was closed to all traffic. 

We performed a detailed inspection and analysis of the bridge and completed an Engineering Study to restore the bridge for pedestrian traffic. During our inspection, we discovered that the Town Lattice span was in danger of collapse due to advanced deterioration in the bottom chord at the bearings. We designed interim repairs to the truss which were completed thereafter.  

We completed a full analysis and rehabilitation design of all four spans of the bridge for pedestrian and snow loads. The full pedestrian load specified in AASHTO was reduced and the bridge posted to eliminate the member replacement due solely to member capacity.