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Toxicity studies with micronized forms of copper are available.
Acq treated hardwood. Preserve acq alkaline copper quaternary acq is a water based wood preservative formulation made of soluble copper and a quaternary compound. Chromium vi is not likely to be on surfaces of treated wood. Acq alkaline copper quaternary is a water based wood preservative that prevents decay from fungi and insects i e it is a fungicide and insecticide. Acq treated pine is classified as a softwood but is still durable.
Cca treated timber cannot be used for garden furniture picnic tables exterior seating children s play equipment patio and domestic decking and hand rails. Those who would like treated timber for timber decking in brisbane are not allowed to use cca treated timber. Acq h4 landscaping hardwood. 8 while treated wood dries most chromium vi changes to another form chromium iii.
It is necessary to use fasteners meeting or exceeding requirements for astm a 153 class d such as ceramic coated as mere galvanized and even common grades of stainless steel corrode. 11 acq ca mca and mcq contain copper but also other ingredients not discussed in this fact sheet. Luckily acq treated pine has proven to be an inexpensive but effective alternative. The soluble copper makes the wood very resistant to biological attack and a quaternary ammonium compound quat acts as biocide and insecticide increasing the tolerance of the treated lumber to.
Water based preservatives like acq leave a dry paintable surface. Began mandating the use of non arsenic. Since it contains high levels of copper acq treated timber is five times more corrosive to common steel. 10 forms of copper may vary in toxicity.
Alkaline copper quaternary usually abbreviated acq is a type of water based wood preservative product containing a soluble copper ii complex and quaternary ammonium alkyl or aryl substituted compounds quats thus the product was originally called ammoniacal copper quaternary ammonium. Alternative treatment such as naturewood acq is approved for use in these applications. The treatment provides protection against termites and rotting. Acq alkaline copper quaternary treated timber is an arsenic and chrome free alternative to using cca treated timber that has been developed to provide long term protection to wood exposed in exterior applications.
100x75 x 2 4m 100x100 x 2 4m 100x100 x 3 0m. Available in the following sizes. It also has relatively low risks based on its components of copper oxide and quaternary ammonium compounds.
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