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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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Title: Field Evaluation of Timber Preservation Treatments for Highway Applications

Source:  Field evaluation of timber preservation treatments for highway applications. Ames, Iowa : Center for Transportation

Author(s)Bigelow, Jake J.; Clausen, Carol A.; Lebow, Stan T.; Greimann, Lowell

Publication Year: 2007  View PDF »

Category: Journal Articles

Abstract: Timber material repair and replacement cost for timber bridges is a considerable expense to highway agencies in Iowa, especially to county road departments. To address these needs, the objectives of this investigation was to study the field effectiveness of various treatment alternatives used on Iowa roadway projects and to determine if the current specifications and testing are adequate for providing proper wood preservation. To satisfy the research needs, the project scope involved a literature review, identification of metrics, questionnaire survey of Iowa counties, onsite inspections, and a review of current specifications and testing procedures. Based on the preservative information obtained, the following general conclusions were made: Copper naphthenate is recommended as the plant-applied preservative treatment for timber bridges. Best Management Practices should be followed to ensure quality treatment of timber materials. Bridge maintenance programs need to be developed and implemented. The Iowa Department of Transportation specifications for preservative treatment are the regulating specification for bridges constructed with state or federal funding in Iowa and are also recommended for all other bridges.

Keywords: Bridges; specifications; testing; wooded bridges; Iowa; coatings; deterioration; copper naphthenate; service life; wood preservatives; design; construction; timber bridges; preservatives; review article

File size: 2,320 kb(s)

Date posted: 07/06/2009

This publication is also viewable on Treesearch:  view
RITS Product ID: 29771
Current FPL Scientists associated with this product (listed alphabetically)
Clausen, Carol A.
Supervisory Research Microbiologist
Lebow, Stan T.
Research Forest Products Technologist

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