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 World Hardwood 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: