Acq h4 landscaping hardwood.
Acq treated hardwood.
In fact most state governments and local councils have chosen to err on the side of.
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.
100x75 x 2 4m 100x100 x 2 4m 100x100 x 3 0m.
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.
The evidence against the use of cca treated timber isn t strong but the simple fact is that lots of people don t trust it won t trust it and won t use it because arsenate is one of the compounds used in the manufacture of cca.
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.
The treatment provides protection against termites and rotting.
Chromium vi is not likely to be on surfaces of treated wood.
Since it contains high levels of copper acq treated timber is five times more corrosive to common steel.
8 while treated wood dries most chromium vi changes to another form chromium iii.
Acq treated pine is classified as a softwood but is still durable.
Available in the following sizes.
Luckily acq treated pine has proven to be an inexpensive but effective alternative.
Water based preservatives like acq leave a dry paintable surface.
Began mandating the use of non arsenic.
Those who would like treated timber for timber decking in brisbane are not allowed to use cca treated timber.
Cca treated timber cannot be used for garden furniture picnic tables exterior seating children s play equipment patio and domestic decking and hand rails.
Alternative treatment such as naturewood acq is approved for use in these applications.
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.
10 forms of copper may vary in toxicity.
Toxicity studies with micronized forms of copper are available.
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.