LATEST DEVELOPMENTS OF "IN-PLACE" TREATMENT OF TIMBER BRIDGES

THE CAUSE AND MECHANISM OF WOOD DECAY IS DISCUSSED IN ORDER TO MAKE MORE EFFECTIVE MAINTENANCE PROGRAMS UTILIZING IN-PLACE TREATMENT. SINCE PENTACHLOROPHENOL IS THE PRESERVA- TIVE USED FOR IN-PLACE TREATMENT, ITS THRESHOLD VALUE IS DISCUSSED. THRESHOLD IS DEFINED AS THE MINIMUM AMMOUNT OF PRESERVATIVE WHICH EFFECTIVELY STOPS FUNGI GROWTH. A METHOD IS EXPLAINED FOR DETERMINING THRESHOLD VALUES. THE LATEST DEVELOPMENT OF IN-PLACE TREATMENT OF TIMBER BRIDGES IS SUMMARIZED AS FOLLOWS: (1) THE KNOWLEDGE OF INTERNAL DECAY IN TIMBER BRIDGES HAS INCREASED CONSIDERABLY, (2) THIS HAS LED TO IMPROVED METHODS OF INSPECTION AND IN-PLACE TREATMENT, AND (3) NOW THAT SEVERAL HUNDRED BRIDGES HAVE BEEN TREATED IN-PLACE OVER A PERIOD OF 15 YEARS WITH EFFECTIVE RESULTS, AND NOW THAT LABORATORY ANALYSIS OF THESE RESULTS ARE AVAILABLE, THE IN-PLACE TREATMENT CAN NO LONGER BE CLASSIFIED AS EXPERIMENTAL AND ITS USE SHOULD BE CONSIDERED IN OVERALL BRIDGE MAINTENANCE PROGRAM.

• Supplemental Notes:
  • 73rd Ann CoNV, PP 28-34, 10 FIGS
• Corporate Authors:

  American Railway Bridge & Building Association

  18154 Harwood Avenue
  Homewood, IL  United States  60430
• Authors:
  • Williams, J R
• Publication Date: 1968

Media Info

• Serial:
  • American Railway Bridge & Building Assoc, Proc
  • Publisher: American Railway Bridge & Building Association

Subject/Index Terms

• TRT Terms: Biodeterioration; Field tests; Fungi; Inspection; Machines; Wood; Wood preservatives; Wooden bridges
• Uncontrolled Terms: Causes; Treatment
• Old TRIS Terms: Insitu methods; Mechanisms
• Subject Areas: Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00218557
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 13 1970 12:00AM