A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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 subject to wetting from splashing and members below windows or other openings that allow entry of wind-blown precipitation. Pressure-treated timber bridge members can be vulnerable when untreated wood is exposed by field fabrication or by the development of drying checks. The objective of an in-place preservative treatment is to distribute preservative into areas of a structure that are vulnerable to moisture accumulation and/or not protected by the original pressure treatment. Types of field treatments range from finishes, to boron rods or pastes, to fumigants. A limitation of in-place treatments is that they cannot be forced deeply into the wood as is done in pressure-treatment processes.
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 subject to wetting from splashing and members below windows or other openings that allow entry of wind-blown precipitation. Pressure-treated timber bridge members can be vulnerable when untreated wood is exposed by field fabrication or by the development of drying checks. The objective of an in-place preservative treatment is to distribute preservative into areas of a structure that are vulnerable to moisture accumulation and/or not protected by the original pressure treatment. Types of field treatments range from finishes, to boron rods or pastes, to fumigants. A limitation of in-place treatments is that they cannot be forced deeply into the wood as is done in pressure-treatment processes.
Guide for In-Place Treatment of Covered and Timber Bridges
S. Lebow (author) / G. Kirker (author) / R. White (author) / T. Amburgey (author) / M. H. Barnes (author)
2012
45 pages
Report
No indication
English
Highway Engineering , Structural Analyses , Wood & Paper Products , Laminates , Wooden bridges , Bridge decks , Preservatives , Bridges(Structures) , Highway bridges , Performance monitoring , Moisture , Temperature , Humidity , Timber structures , Treatments , National Historic Covered Bridge Preservation Program(NHCBP)
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