Guidelines for the design of stress-laminated timber decks have been published by AASHTO, but they do not provide comprehensive information on materials, construction, and inspection. Therefore, this document presents: (1) background information on timber bridge materials and their quality control; (2) a comprehensive step-by-step design procedure based on the 1991 AASHTO Guide Specification; and (3) guidelines for construction, field monitoring, inspection, and maintenance procedures. Potential fabrication problems are discussed, and an inspection checklist is included.

These guidelines are designed for decision makers (selection, country commissioners, city planners, preservation officers, contractors, rehabilitation engineers, etc.) to understand the components that are used to make effective decisions about how and when to repair a covered bridge, such as structural integrity, engineering analyses, condition assessments, how to support the bridge during repairs, and more. There are numerous types of covered bridges and ensuring public safety during repairs is a paramount issue for future generations to enjoy. Related products: Find more Renovation & Historic Preservation resources here: https: //bookstore.gpo.gov/catalog/renovation-historic-preservation Bridges & Tunnels resources collection here: https: //bookstore.gpo.gov/catalog/bridges-tunnels Other products published by the U.S. Forest Service are available here: https: //bookstore.gpo.gov/agency/us-forest-service

This report presents a comprehensive analysis of the design, construction, inspection, and maintenance of timber bridges.