Timber Treatment Brands

AS1604.1 Preservative-treated wood-based products Part 1: Products and treatment requires that preservative-treated timber is marked with an alphanumeric code to identify the following minimum information:

A treatment plant number indicating the place of manufacture.
A preservative code number (listed in Appendix C, AS1604.1)
A hazard class number (described in Section 1 of AS1604.1)
A hazard suffix code

XXX is a 3 digit numerical code indicating the company and treatment plant number (see Table 1)

XX is a 2 digit numerical code indicating preservative number (see Table 2)

HX is an alphanumerical code indicating the hazard appropriate to the preservative level (see Table 3)

X is an alphabetic suffix indicating penetration, preservative or utilization restrictions. (see Table 4)

Other information may be marked on preservative-treated timber including,

the Australian Standard relating to preservative treated timber . i.e. “AS1604.1”
the name of the Company which manufactured the product
the date/time of a preservative treatment
production batch number or product numbers
for CCA treated timber only, the words “treated with copper chrome arsenate”. This is a regulatory requirement of the APVMA
information about any geographic limitations. E.g. Use only south of Tropic of Capricorn
information relating to other product characteristics. E.g. stress grade, moisture content

Treatment plant numbers were assigned to individual treatment plants for many years by the NSW State Government. However this service was discontinued in 2013. Timber Queensland have provided a list below of TQ members and their respective treatment plant numbers. This will assist Queensland timber users to identify preservative treated timber products from Timber Queensland treatment manufacturer members.

Table 1. Treatment Company/Plant Numbers

Plant/Company Numbers	Preservative Treated Timber Manufacturers
197, 338, 511, 652, 653	AKD Softwoods
405	Allied Timber Products
218	Big River Group
349	Cahill & Co
255, 422	Dale and Meyers Operations (trading as DTM Timber)
485	Dindas Australia
240, 287	Highland Pine Products
024, 049	Hyne Timber*
184, 193, 263	Hurford Group
488	Itreat Timber
410, 645, 658	Koppers Wood Products
428, 431	Parkside Group
101, 138	Pentarch Forestry (formerly Boral)
450	Ravenshoe Timbers
546, 547, 548	Tilling Timber
534	Wesbeam

*Hyne Timber also adopt Codemark certification, with corresponding labelling or identification including the
certificate number (CM70001, CM70002, CM70003, CM40200) for each product.

Table 2. Preservative Code Number

Preservative Code Number	Common Preservatives
90	Alkaline copper quaternary
73, 75	Bifenthrin
09, 10, 11,	Boron
01, 02, 03, 14, 15, 16, 31, 32, 33, 34, 38, 40, 43, 46, 47, 51, 55, 61	CCA
89	Copper quaternary
58	Copper azole
59, 60	Imidacloprid
70, 74	Permethrin
64	Tebuconazole + Propiconazole + Permethrin
62	Tributyltin + permthrin

Table 3. Hazard Level Number

Hazard Level No.	Exposure	Biological hazard
H1	Inside above ground	Lyctid borers
H2	Inside above ground	Borers and termites
H2F or H2S	Inside, above ground For use south of the Tropic of Capricorn only	Borers and termites
H3	Outside above ground	Moderate decay, borers and termites
H4	Outside, In ground	Severe decay, borers and termites
H5	Outside, in ground contact with or in fresh water	Very severe decay, borers and termites
H6	Marine waters	Marine wood borers and decay

Table 4. Hazard Suffix

Product Type	AS1604 Part	Suffix	Used with Hazard level	Suffix Explanation & Product
Sawn and Round	1	A	H3	Tributyltin treated product
		F	H2	Envelope treated seasoned framing for use south of the Tropic of Capricorn
		S	H2	Boron treated timber for use south of the Tropic of Capricorn
Reconstituted wood-based products	1	A	H3	Tributyltin treated product
		E	H1, H2, H3	Envelope penetration
		G	H1, H2, H3	Glueline treatment
		G/F	H1, H2, H3	Glueline and face layer
		P	H1, H2, H3	Particle treatment
		S	H2	For use south of the Tropic of Capricorn
Laminated veneer lumber (LVL) & Plywood	1	E	H1, H2, H3, H4, H5	Envelope penetration
		G	H1, H2, H3, H4, H5	Glueline treatment
		G/F	H1, H2, H3, H4, H5	Glueline and face veneer treatment
		O	H1, H2, H3, H4, H5	Outer surfaces treatment
		S	H2	For use south of the Tropic of Capricorn
		V	H1, H2, H3, H4, H5	Veneer treatment
Glue laminated timber	1	A	H3	Non-structural glue laminated timber
Glue laminated timber	1		H2	Envelope treated glue laminated timber

For further information. Refer AS1604 1 Preservative-treated wood-based products Part 1: Products and treatment

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Timber Treatment Brands - explained