Standards for all treated wood products, including fence posts, are established by the American Wood-Preservers' Association (AWPA). This association consists of people representing preservative manufacturers, treating companies, users of treated wood, and research institutions. Members test, discuss, argue over, and eventually agree to the standards that they believe will result in effectively protected wood.
Agricultural fence posts are covered in Standard C16. This standard specifies permissible species, straightness, peeling, and preservatives, as well as the required preservative retention. Retention is the amount of preservative retained in the assay zone of the wood. It is measured in pounds of preservative per cubic foot of wood
(pcf).
For CCA-treated fence posts, Standard C16 requires 0.40 pcf.
Florida Fence Post Company treats posts to this standard. Very few out-of-state post companies do. Furthermore, in order to combat potential damage in the humid climate and acidic soil of Florida, we treat by the "full cell" method. Our experience shows that this is the way to produce long-lasting fence posts. It is why we can offer a 25-year limited warranty, and why our posts are "the fence posts preferred by Florida cattlemen."
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