Technical

Pine Timber

Pine was chosen as a plantation species due to its robustness, excellent growth and versatility of its timber.

Pine is generally sold in dressed rather than sawn form and is widely available.  It is one of the easiest timbers to work with as it stains and glues well, is easy to saw and has good nail holding capacity.  It can also be cut, nailed, drilled and screwed with ordinary hand tools and is planer gauged for more accurate marking and jointing.

Standard Timber Sizes

Structural Pine

Structural Pine
MGP10/F7/F5
Structural Pine
MGP12
BLUE Treated
MGP10 T2 H2
Treated
MGP12 T2 H2
GREEN Treated
MGP10/F7/F5 H3
42×35
70×35
90×35
120×35
140×35
170×35
190×35
190×35 (F5)
70×45
90×45
120×45
140×45
190×45
240×45
290×45 (F7)
70×70 • (H4)
90×90 • (H4)
120×120 • (H4)

Standard timber lengths are 2.4, 3.0, 3.6, 4.2, 4.8, 5.4 & 6.0m.

H3 LOSP Treated Finger Jointed Primed Pine

42×18 30×30 42×42 88×88 (GL8) 140×65 (GL8)
66×18 42×30 66×42 (F7) 112×112 (GL8) 180×65 (GL8)
90×18 66×30 90×42 (F7) 135×135 (GL8) 240×65 (GL8)
116×18 90×30 138×42 (F7) 185×185 (GL8) 290×65 (GL8)
138×18 138×30 185×42 (F7)
185×18 185×30 230×42 (GL8)
230×30 280×42 (GL8)

Pine Treatment Guide

Hazard
Level
Exposure Specific Conditions Hazard Typical Uses
H1 Inside, above ground Completely protected fro the weather and well ventilated and protected from termites Lyctid Borer Framing, flooring, furniture, interior joinery
H2 Inside, above ground Protected from wetting Borers and Termites Framing, flooring and other similar uses in dry conditions
H3 Outside, above ground Subject to periodic moderate wetting Moderate decay, borers and termites Weatherboard, facia, bargeboards, window joinery
H4 Outside, in-ground contact Subject to severe wetting and leaching Severe decay, borers and termites Fence posts, greenhouses, pergola posts (in-ground) and landscaping timbers
H5 Outside, in-ground contact, contact with or in fresh water Subject to extreme wetting and leaching where you require a higher degree of protection Very severe decay, borers and termites Retaining walls, piling, house stumps, building poles
H6 Marine Water Subject to prolonged immersion in sea water Marine wood borers and decay Boat hulls, marines piles, jetty cross bracing

Preservative treatment is used to protect timber from decay, insects, and marine borer attack, and extend the life of timber products. Preservative treatment also makes timber a more viable option for building, construction, and engineering applications.

The degree of preservative treatment, durability, and hazards/environment in which the timber is used, all play a role in the service life of timber, as outlined in AS 5604, Timber – Natural Durability Rating. Regular inspections and maintenance can reduce the severity of exposure and extend the life of the timber product.
Timber Preservative Treatments

CCA – (Copper, Chromium and Arsenic Salts)
CCA is a water-borne preservative treatment of pine timber. CCA is pressure impregnated into the wood and has a high resistance to chemicals leaching out of the timber over time. This high resistance is due to the chromium, which locks in the elements of copper and arsenic into the wood. The arsenic and copper elements protect from insect and fungal attack.  Pine that has been treated with CCA is clean, odourless, and has a slight green colour.

LOSP – (Light Organic Solvent-Borne Preservative)
LOSP is a solvent-borne preservative treatment of pine timber. The organic solvent takes the preservative into the wood and is drawn out in the last stages of treatment leaving the preservative in the wood. LOSP treated pine has long lasting protection against decay and insect attack.  LOSP treated timber is great for appearance applications such as external joinery, due to it leaving the light coloured appearance unchanged after treatment.

ACQ – (Alkaline Copper Quaternary)

ACQ is a water-borne preservative treatment of pine timber. The ACQ treatment process is similar to CCA but is free of arsenic. Instead, it uses copper and ammonium compounds as agents against insect attack, fungi, termites, and wood boring insects.  After pine has been treated with ACQ its appearance can range from dark green to brownish green and can be stained or painted once dry.

Copper Azole (Tanalith E)
Copper Azole or Tanalith E as more commonly known as a water-borne preservative treatment of pine timber. The preservative contains copper, boric acid, and tebuconazole and is a new generation arsenic-free preservative treatment. The copper in the preservative acts as a fungicide and the tebuconazole as an insecticide.  After treatment the pine has a green colour, and after weathering will change to a honey brown colour. Tanalith E treated timber is usually specified for in and out of ground applications where there is a medium to high risk of decay or insect attack.

Tanalised®
Tanalised is a safe organic based insecticide treatment, which protects wood against termites. It consists of a common insecticide called permethrin and a linseed oil blend, which makes it safe and cost effective.  Tanalised treated timber is used for framing and roof trusses in construction. There are two versions of this treatment – one is blue in colour and only suitable for use in areas south of the Tropic of Capricorn. The other is red in colour and suitable for all areas in Australia.