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  USA  60430
  • Authors:
    • Williams, J R
  • Publication Date: 1968

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Filing Info

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