This report presents a literature search, findings of a survey on the current state of historic bridge rehabilitation or replacement decision making by state and local transportation agencies, and nationally applicable decision-making guidelines for historic bridges. The guidelines are intended to be used as the protocol for defining when rehabilitation of historic bridges can be considered prudent and feasible and when it is not based on engineering and environmental data and judgments. The guidelines include identification of various approaches to bringing historic bridges into conformance with current design and safety guidelines/standards, and the effect or implications of remedial action on historical significance. There are currently no such nationally applicable decision-making guidelines, but there are a variety of state and local processes and policies for managing historic bridges. Effective practices for the various processes inform the nationally applicable guidelines. The guidelines are in narrative and matrix format.
The bridge was inspected regularly and evidence of structural deterioration of the embedded steel was revealed . ... They are discussed in the following sections in what seems a natural order , be- ginning with the crucial issues of ...
Collapse of U.S. 35 Highway Bridge , Point Pleasant , West Virginia , December 15 , 1967. National Transportation Safety Board , Interim Report SS - H - 2 ( October 4 , 1968 ) ; Final Report NTSB - HAR - 71-1 ( December 16 , 1970 ) .
Bridges that are designated historic present a special challenge to bridge engineers whenever rehabilitation work or improvements are made to the bridges.
Historic Highway Bridges in Pennsylvania: Preservation Guide
Figure 4.10 — Structural wood l - joists used as shoring beneath the truss chords and deck ( Blair Bridge , 1829 , 1969 , Grafton County , New Hampshire ) . Figure 4.8 — Supplementary beams installed to support the roadway in an earlier ...
From ancient China to modern-day Minnesota, the book di
Bridge Worth Saving is a call to action. Everything about this book?its structure, its content, its style?shouts "Save that old bridge!" Unlike some calls to action that leave their...
Bridges that are designated historic present a special challenge to bridge engineers whenever rehabilitation work or improvements are made to the bridges.
Throughout the state of Indiana, there a number of older, historical bridges which have been in service since the late 19th century.
Bridge Safety: Hearings Before the Subcommittee on Investigations and Oversight of the Committee on Public Works and Transportation, House of...