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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Requested Product

Title: Improved Ratings for Covered Bridges Via Load Testing

Source: FPL RIP-4719-004

Author(s)Wacker, James; Phares, Brent

Publication Year: 2009  View PDF »

Related Publications: view

Category: Research In Progress

Abstract: According to the Federal Highway Administration (FHWA), approximately 880 historical covered timber bridges remain in the United States. These magnificent bridges were built with several types of heavy timber trusses that were developed during America's first century (1776-1876). These examples of early-American bridge building traditions are mostly located in the northeastern United States but are also found in significant numbers in the Pacific Northwest. Pennsylvania, Ohio, Indiana, Vermont, and Oregon have the largest inventories of surviving covered timber bridges. Efforts to preserve these structures have largely been driven by local fundraising efforts until recently. In 2000, FHWA established a National Program for the Historic Preservation of Covered Timber Bridges. The program provides grant funding opportunities for states to protect, restore, preserve, or rehabilitate their historical covered timber bridges. These bridge preservation efforts are guided by the Secretary of Interior's Guidelines for Historic Preservation.

Keywords: covered bridge; load testing; improved ratings; live-load testing; bridge performance

File size: 1,080 kb(s)

Date posted: 08/24/2009
Current FPL Scientist associated with this product
Wacker, James P.
Research General Engineer

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