Corrosion of Fastners in Wood Treated with Newer Wood Preservatives for Potential Rehabilitation of Covered Bridges

Metallic fasteners have been used in covered bridges for centuries and have performed well in untreated timbers. However, durability concerns during rehabilitation of these historic structures typically dictate the use of treated wood. Because of environmental considerations, effective wood preservatives that have been used for many years are being replaced with a newer wood preservative, such as alkaline copper quaternary (ACQ) and copper azole (CuAz), that are showing accelerated corrosive effects on iron fasteners.

Language

• English

Project

• Status: Active
• Contract Numbers:

  RIP-4723-010

• Sponsor Organizations:

  National Center for Wood Transportation Structures

  Iowa State University, 2711 S Loop Srive
  Ames, IA  United States  50010
• Performing Organizations:

  Forest Products Laboratory

  P.O. Box 5130, North Walnut Street
  Madison, WI  United States  53705
• Principal Investigators:

  Zelinka, Samuel

• Start Date: 20090000
• Expected Completion Date: 0
• Actual Completion Date: 20110000
• Source Data: RiP Project 28047

Subject/Index Terms

• TRT Terms: Bridge design; Corrosion; Covered bridges; Fasteners; Historic bridges; Rehabilitation (Maintenance)
• Uncontrolled Terms: Alkaline copper quatenary
• Subject Areas: Bridges and other structures; Highways; I30: Materials;

Filing Info

• Accession Number: 01463702
• Record Type: Research project
• Source Agency: National Center for Wood Transportation Structures
• Contract Numbers: RIP-4723-010
• Files: RIP
• Created Date: Jan 3 2013 2:28PM