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.
Acq treated hardwood.
The treatment provides protection against termites and rotting.
In fact most state governments and local councils have chosen to err on the side of.
Acq treated pine is classified as a softwood but is still durable.
Alternative treatment such as naturewood acq is approved for use in these applications.
100x75 x 2 4m 100x100 x 2 4m 100x100 x 3 0m.
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.
It also has relatively low risks based on its components of copper oxide and quaternary ammonium compounds.
Began mandating the use of non arsenic.
Toxicity studies with micronized forms of copper are available.
Chromium vi is not likely to be on surfaces of treated wood.
Cca treated timber cannot be used for garden furniture picnic tables exterior seating children s play equipment patio and domestic decking and hand rails.
Available in the following sizes.
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.
Acq h4 landscaping hardwood.
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.
Acq is an eco friendly alternative to other timber containing chromium or arsenic.
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.
Preserve acq alkaline copper quaternary acq is a water based wood preservative formulation made of soluble copper and a quaternary compound.
11 acq ca mca and mcq contain copper but also other ingredients not discussed in this fact sheet.
Water based preservatives like acq leave a dry paintable surface.
Those who would like treated timber for timber decking in brisbane are not allowed to use cca treated timber.