Timber Queensland represents and protects member interests at all levels of government.

Timber Queensland

You are here

Using Timber

 

Timber Treatment Brands - explained


AS1604 “Specification for preservative 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

I

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”
  • 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

  461

Tarmac Qld Pty Ltd

  240

Highland Pine Products

  393, 396, 424

Dale and Meyers Operations Pty Ltd T/A DTM Timber

  049, 024

Hyne & Son Pty Limited

 

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, 51, 55

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

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

  2

  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

  3, 4

  A

  H3

Tributyltin treated product

  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

  5

  A

  H3

Non-critical glue laminated timber

  E

  H2

Envelope treated glue laminated timber


For further information. Refer AS1604 “Specification for Preservative Treatment.