Guide for In-Place Treatment of Wood in Historic Covered and Modern Bridges
This online engineering PDH interactive presentation provides a brief outline on the causes of biodeterioration to bridges and the procedures for preventing or mitigating their effects.
Wooden bridges, whether historic covered bridges or current highway timber bridges, can be vulnerable to damage from biodegradation. Biodeterioration is minimized through design and construction practices, and in the case of modern timber bridges, through pressure treatment of the timbers with wood preservatives. However, the potential for degradation remains, and over time many bridges need maintenance that may include in-place treatment with preservatives.
This presentation describes procedures for selecting and applying in-place treatments to bridges to prevent or arrest degradation. It also focuses on preservative treatments to protect wooden bridges against biodeterioration and discusses approaches for minimizing damage caused by fire.
This 3 PDH online interactive presentation is applicable to architects, engineers, and other environmental design specialists, who are interested in gaining a better understanding of the causes of biodeterioration of wood.
This continuing education interactive presentation is intended to provide you with the following specific knowledge and skills:
- Familiarizing with the causes and problem areas for biodegradation in wooden bridges, the effects of climate and the role of wood structure
- Learning about the different types of supplemental treatments including water-diffusible preservatives, non-diffusible liquid treatments and fumigants
- Gaining a general overview on the application and use of supplemental preservative treatments for covered bridges
- Understanding the use of supplemental fire-retardant treatments for covered bridges
- Exploring supplemental treatment concepts such as liquid surface treatments, paste surface treatments, and internal treatments
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