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

Has anyone actually seen a bridge being built in America? This editor has travelled for almost 40 years in America without seeing a single one being constructed -- and few even being repaired. Some critics point out that America has built excellent bridges in Vietnam and Iraq which indicates that the knowledge base remains intact. Others say that individual states cannot feed their armies of bureaucrats and fund their plush pensions and health care programs and still expect to build bridges. And the federal government cannot be counted on for much of anything useful. This book presents recent reports focusing on this part of America's crumbling infrastructure.

This manual is intended to serve as a reference. It will provide technical information which will enable Manual users to perform the following activities:Describe typical erection practices for girder bridge superstructures and recognize critical construction stagesDiscuss typical practices for evaluating structural stability of girder bridge superstructures during early stages of erection and throughout bridge constructionExplain the basic concepts of stability and why it is important in bridge erection* Explain common techniques for performing advanced stability analysis along with their advantages and limitationsDescribe how differing construction sequences effect superstructure stabilityBe able to select appropriate loads, load combinations, and load factors for use in analyzing superstructure components during constructionBe able to analyze bridge members at various stages of erection* Develop erection plans that are safe and economical, and know what information is required and should be a part of those plansDescribe the differences between local, member and global (system) stability

Old Materials, New Climate: Traditional Building Materials in a Changing World is an accessible guidebook to understanding historic materials – how they were traditionally made, how they survived the test of time, and how changes in climate are now impacting materials in new ways. Protecting historic buildings from a rapidly changing and unpredictable climate requires an understanding of how climate affects weather and how weather affects the durability of the most widely used traditional materials – wood, adobe, brick, lime, concrete, metal, and paint. This resource examines how gradual and dramatic changes in climate threaten to accelerate normal weathering and presents strategies to safeguard historic materials for future generations. Illustrated case studies explore how weather is affecting materials in specific historic buildings in climate zones in the United States and across the globe. Drawing on the work of experts in conservation, biology, chemistry, and environmental impacts, this book is an invaluable resource for any student, preservationist, architect, or contractor interested in expanding their knowledge of materials and why they perform as they do.

"An account of the moving, repair, restoration, and building of authentic covered bridges in New England and New York by those who did the actual work." --introduction, page xv