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  1. Guide for In-Place Treatment of Covered and Timber Bridges

    Historic covered bridges and current timber bridges can be vulnerable to damage from biodeterioration or fire. This guide describes procedures for selecting and applying in-place treatments to prevent or arrest these forms of degradation. Vulnerable areas for biodeterioration in covered bridges include members contacting abutments, members near the ends of bridges...

    Author(s):
    Stan Lebow; Grant Kirker; Robert White; Terry Amburgey; H. Michael Barnes; Michael Sanders; Jeff Morrell
    Year:
    2012
    Keywords:
    guide, covered bridge, timber bridge, deterioration, fire, wood preservatives, in-place treatment
    Source:
    Forest Products Laboratory, General Technical Report

  2. Species Identification and Design Value Estimation of Wooden Members in Covered Bridges

    Covered timber bridges are historic structures with unique aesthetic value. To preserve this value and maintain bridges in service, robust evaluation of their performance and safety is necessary. The strength of the timber found in covered bridges can vary considerably, not only because of age and condition, but also because of species and grade. For the practicing...

    Author(s):
    Alex C. Wiedenhoeft; David E. Kretschmann
    Year:
    2014
    Keywords:
    field grading, species identification, covered bridges, inspection, wood anatomy, condition assessment, design value estimation
    Source:
    USDA Forest Service, Forest Products Laboratory, General Technical Report, FPL-GTR-228. 94 p.

  3. Evaluation of a timber column bent substructure after more than 60 years in-service

    This paper describes both the field evaluation and laboratory testing of two timber-column-bent bridge substructures. These substructures served as intermediate pier supports for the East Deer Park Drive Bridge located in Gaithersburg, Maryland. A field evaluation of the bridge substructure was conducted in September 2008. Nondestructive testing was performed with a...

    Author(s):
    James P. Wacker; Xiping Wang; Douglas R. Rammer; William J. Nelson
    Year:
    2011
    Keywords:
    Bridges, inspection, wood deterioration, service life, design, construction, loads, moisture, maintenance, repair, weathering, nondestructive testing, micro-drilling, laminated wood, composite materials, East Deer Park Drive Bridge, laminated bridges, glulam timbers, stress-laminated bridges, timber bridges, performance testing, wooden bridges, durability, structural timbers, wood decay, moisture content
    Source:
    Proceedings of the CIMAD11 - 1º Congresso Ibero-LatinoAmericano da Madeira na Construção [Spanish & Latin American Conference on Timber Construction], Coimbra, Portugal, June 7-9, 2011 [electronic resource]. [S.l. : s.n.], 2011: [1 flash drive]: 7 p.
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