A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Investigation of Glulam Girder Bridges Constructed Prior to 1970
The United States glulam industry began requiring high-quality, tension grade laminations in 1970 for the manufacture of beams designed primarily for bending applications. Glulam girders that were manufactured prior to that date, and remain in-service today, are currently subject to significant strength reductions during the bridge load rating process. This paper describes this issue as it pertains to an inventory of early glulam girder bridges, built primarily by the USDA Forest Service between the years 1950-70, on their roadway network. It describes a series of field bridge evaluations, a laboratory investigation of salvaged girders, and discusses the development of an alternative approach for load rating these unique timber bridges. The overall goal of these efforts was to preserve these early glulam girder bridges that are in danger of replacement even though they carried heavy logging trucks safely for decades, and in many cases, are still performing satisfactorily.
Investigation of Glulam Girder Bridges Constructed Prior to 1970
The United States glulam industry began requiring high-quality, tension grade laminations in 1970 for the manufacture of beams designed primarily for bending applications. Glulam girders that were manufactured prior to that date, and remain in-service today, are currently subject to significant strength reductions during the bridge load rating process. This paper describes this issue as it pertains to an inventory of early glulam girder bridges, built primarily by the USDA Forest Service between the years 1950-70, on their roadway network. It describes a series of field bridge evaluations, a laboratory investigation of salvaged girders, and discusses the development of an alternative approach for load rating these unique timber bridges. The overall goal of these efforts was to preserve these early glulam girder bridges that are in danger of replacement even though they carried heavy logging trucks safely for decades, and in many cases, are still performing satisfactorily.
Investigation of Glulam Girder Bridges Constructed Prior to 1970
J. S. Groenier (author) / D. Strahl (author) / J. P. Wacker (author)
2017
6 pages
Report
No indication
English
Civil Engineering , Highway Engineering , Construction Equipment, Materials, & Supplies , Materials Degradation & Fouling , Structural Analyses , Highway bridges , Investigations , Girders , Structural analysis , Tension grade , Laminations , Glulam , Load rating , Strength reduction , Girder bridges , Timber bridges , Preservation , Field evaluations , Laboratory investigations
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