Radiata Pine
Botanical name
Pinus radiata
Radiata Pine is grown in plantations in most states of Australia.
Trading names
Radiata Pine
Heartwoodpale yellow-brown.
Sapwoodwide and not always clearly distinguishable.
Texturefine but uneven.
Grainusually straight except for a central core of about 100mm in diameter, which is prone to twisting if moisture content changes.
Growth ringsprominent.
Knotsvery common.
General comment
Easy to dry, except for the twist-prone core.

Very prone to bluestain during the warmer months.

Because of its rapid drying rate it is usually kiln dried directly from the green condition.

Easy to work except for the knots. Nails satisfactorily.

Material high in resin content is difficult to glue.

Clear material can be painted satisfactorily but knots, resin streaks and the bands of dense latewood are inclined to bleed sufficient resin to mar exterior coatings if material high in resin content is so used; such material should be reserved for structural purposes.

Unsuitable for steam bending because of the difficulty of obtaining an even curve.

Prone to surface checking when exposed uncoated to the weather or when coated only with stain-type finishes, which are less protective against moisture penetration.

Unlike the eucalypts, radiata pine does not cause appreciable staining of alkaline surfaces, such as concrete paths and fibre-cement cladding.
Common uses
General construction, flooring, panelling, furniture, joinery, plywood, particleboard, fibreboard, paper.

When preservative-treated it is used for cladding, decking, external trim, posts, piles, fencing and sleepers.
(See notes below)
Hardness rating
Average Hardness Rating - Dry: Soft

Lyctid Susceptibility of Sapwood
Not susceptible
(source AS 5604)

Termite Resistance of Heartwood (inside above ground)
Not resistant
(source AS 5604)

Marine Borer Resistance of Heartwood
Class 4
(source AS 5604)

Natural Durability Rating of Heartwood Above Ground
Class 4
(source AS 5604)

Natural Durability Rating of Heartwood In-Ground Contact
Class 4
(source AS 5604)

Density: 'Green Density' (GD) is the density of the wood at the time the living tree is felled. It varies considerably with the season, weather conditions, the age of the tree and so on; the quoted figure must therefore be accepted as a guideline only and when accurate green density figures are required for, say, assessment of transport costs, it is advisable to carry out accurate determinations on the materials involved.

'Dry Density' or 'Air Dry Density' (ADD) is the average density of the wood at 12 per cent moisture content. It too varies with conditions of growth, climate and maturity of wood.

There are published figures for both Green Density and Air Dry Density of most commercial species.

The figures given above have been rounded to the nearest 50.

Hardness rating: the hardness rating of a timber species is measured by the Janka Test. This is a standard test which measures the penetration into the timber of a common load and projectile. The results relate to a hardness capacity of the material and are expressed in kN. This information is useful where the timber may be subject to potential damage from impacts e.g. a dance floor. There are 2 sets of published figures; one for 'Green' or freshly felled timber and one for seasoned timber - i.e. timber with a moisture content of 12%.

The ratings given here are:
  Soft - less than 5.5
  Moderate - 5.5 to 7.0
  Hard - 7.1 to 10.0
  Very Hard - greater than 10.0.

Lyctid susceptible sapwood: Only the sapwood of some hardwoods is susceptible to lyctid borer attack. No softwoods are susceptible to attack.

Natural durability ratings: The natural durability rating of a timber species is a rating of the timber's resistance to attack by wood destroying fungi and wood destroying insects. The sapwood of all timber species has poor resistance and so the natural durability rating applies only to the heartwood of a timber species. The rating is based on the testing of stakes and poles embedded in the ground and on expert opinion of historical performance. There are 2 sets of ratings: one for above ground use and one for in-ground contact use. The lower the number the higher the performance in terms of durability. This information is useful for specifying material for external or exposed applications.