Copper chromated arsenate (CCA) treated timber poles are commonplace, especially since the rising costs of oilborne systems have made a waterborne treatment more attractive economically. Some utilities prefer the softer oilborne treatments for lineman-climbing; however, some CCA treaters apply a refined hydrocarbon oil emulsion in the outer layer of the pole to combat this issue. The viscous oil additive serves as a lubricant, making the pole easier to climb. CCA was effectively banned for residential lumber uses in 2003 when producers and the EPA reached a voluntary agreement to limit uses to industrial applications. Like penta, CCA is also a restricted-use pesticide. Cedar poles can be effectively treated with CCA, although it is more common to see penta-treated cedar poles, either thermal butt or full-length treated. Several CCA suppliers exist, but there is only one supplier of the oil emulsion that makes the poles more climbable
All R&B Timber Group products meet the relevant SABS specification and ISO9001 standards, against pest, insect & fungal infestation.
CCA Treatment has different hazard classes:
- H2 - Interior use e.g: Beams, Roof trusses.
- H3 - Exterior above ground e.g: Laths, Droppers, Fencing Rails.
- H4 - Exterior ground contact e.g: Fencing, Building, Agriculture.
- H5 - Fresh water contact e.g: Irrigation, Jetties.
- H6 - Marine water contact e.g: Jetties, Walkways.
More reading on CCA treament is available: