This standard specifies the requirements for timber intended for use in the construction of cooling towers. It details the acceptable species, grading rules, permissible defects, and the essential preservative treatments required to withstand continuous exposure to moisture, leaching, and biological degradation.
Timber for cooling towers
Quick Reference Values
Maximum moisture content before treatment25%
Minimum retention of CCA/CCB preservative16 kg/m³ to 24 kg/m³
Practical Notes
Timber in cooling towers is subjected to severe continuous leaching; therefore, pressure treatment using highly fixed preservatives like CCA (Copper-Chrome-Arsenic) or CCB is strictly mandatory.
Always ensure the timber is seasoned to a moisture content below 25% prior to preservative treatment to allow for adequate chemical penetration.