Radiata Pine is not durable in outdoor applications but when it is impregnated with chemicals it can show characteristics of a more highly durable species. The main purpose of the treatment is to protect against insect attack or decay or both. The type of treatment and the hazard level it is treated to denote its suitability for particular applications.
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| LOSP |
Light Organic Solvent Preservative |
| CCA |
Copper Chrome Arsenic |
| ACQ |
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Hazard Types
| H2 |
Suitable inside above ground for protection against borers & termites
E.g. Framing, interior joinery, furniture |
| H3 |
Suitable outside above ground for protection against borers & termites and moderate decay,
E.g. Fascia, exterior joinery, decking, exterior bearers & joists, handrails etc. |
| H4 |
Suitable outside in ground for protection against borers & termites and severe decay.
E.g. Fence posts, landscaping (Non critical structures) |
| H5 |
Suitable outside in ground for borers & termites and very severe decay.
E.g. retaining walls, house stumps, building poles, cooling towers. |
| H6 |
Suitable for immersion in Sea water, protection against marine borers and extreme decay.
E.g. Marine piles, jetty cross bracing, boat hulls. |
The typical products that are readily available in treated radiata pine are: |
1. Radiata Pine F5/F7 Graded, Rougher Headed H3 CCA Re-Dried Treated
The finish is rougher headed, visually graded to F7 as per AS2858, CCA treated to Hazard level H3, then re kiln dried to a maximum 15% moisture content. The typical uses for this product are. Exterior bearers and joists, pergola and carport beams, rafters, battens, fence rails, or any other exterior above ground application where structural strength is requirement. |
Sizes Available (in millimeters)
| 70 X 35 |
90 X 35 |
140 X 35 |
190 X 35 |
| 70 X 45 |
90 X 45 |
140 X 45 |
190 X 45 |
240 X 45 |
290 X 45 |
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| *140 X 70 |
*190 X 70 |
*240 X 70 |
*290 X 70 |
*subject to availability | |
Lengths Available (in metres)
| 3.6 |
4.2 |
4.8 |
5.4 |
6.0 |
| *2.4 |
*3.0 |
*in some sections | |
2. Radiata Pine F7 Graded, Rougher Headed H4 CCA Re-Dried Treated
The finish is rougher headed, visually graded to F7 as per AS2858, CCA treated to Hazard level H4, then re kiln dried to a maximum 15% moisture content. The typical uses for this product are. Exterior posts, stumps, fence posts and any other exterior in ground application where structural strength is requirement. |
Sizes Available (in millimeters)
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Lengths Available (in metres)
| 2.4 |
2.7 |
3.0 |
3.6 |
| 4.2 |
4.8 |
5.4 |
6.0 | |
3. Radiata Pine Fence Grade, Sawn or Dressed H3 or H4 CCA Wet Treated
The finish is usually rough sawn although it may be machined to get a consitent size. It is H3 treated and is generally NOT re-dried and therefore termed WET treated. The timber will dry out over time and therefore may show some shrinkage and distortion. Typically these grades are used where appearance is not critical. E.g. Fence rails, palings, posts and plinths, garden sleepers, retaining walls. |
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Sizes Available In H3 Treated (in millemeters)
| 100 X 25 |
150 X 25 |
200 X 25 |
| 75 X 38 |
100 X 38 |
| 75 X 50 |
100 X 50 |
| 100 X 12 |
150 X 12 |
| 100 X 15 |
150 X 15 | |
Lengths Available (in metres)
Lengths available depend on application.
Palings usually
Fence rails usually
Lengths therefore need to be checked but are available from 1.2 to 6.0. |
Sizes Available In H4 Treated (in millemeters)
| 150 X 50 |
200 X 50 |
| 150 X 75 |
200 X 75 |
| 100 X 100 |
150 X 100 |
200 X 100 | | |
