Radiata
Common Uses
| Factory construction | Paneling | Building construction |
| Figured veneer | Pulp/Paper products | Building materials |
| Form work | Pulpwood | Cabin construction |
| Heavy construction | Rough construction | Construction |
| Joinery | Veneer | Decorative veneer |
| Light construction | Wainscoting | Packing cases |
| Boxes and crates |
Numerical Values
| Category | Green | Dry | Unit |
|---|---|---|---|
| Bending Strength | 5700 | 11020 | psi |
| Crushing Strength (Perp.) | -- | -- | psi |
| Max. Crushing Strength | 2660 | 6038 | psi |
| Impact Strength | 18 | 22 | inches |
| Stiffness | 1140 | 1330 | 1000 psi |
| Work to Maximum Load | 9 | 15 | in-lbs/in3 |
| Hardness | 820 | -- | lbs |
| Shearing Strength | 1700 | -- | psi |
| Toughness | -- | -- | in-lbs |
| Specific Gravity | 0.48 | -- | -- |
| Weight | 40 | 32 | lbs.cu.ft. |
| Density (Air-dry) | 32 | -- | lbs.cu.ft. |
| Radial Shrinkage. (G->OD) | 3% | -- | -- |
| Tangential Skrink. (G->OD) | 7% | -- | -- |
| Volumetric Shrink. (G->OD) | 11% | -- | -- |
Countries
Australia
Chile
New Zealand
South Africa, and
United States
Environmental Profile
Native to southern California, Radiata pine is reported to be a threatened species within its natural habitat. Its population on the Guadeloupe Island is reported to be especially vulnerable, but it has been successfully and widely planted in many areas in the southern hemisphere where pines are known to be non-native.
Distribution
Although the natural range of Radiata pine is reported to be extremely small, (three localities on the coast of central California in the fog belt that extends about 6 miles (9.7 km) inland) its present expansion in the Southern Hemisphere through cultivation is reported to quite substantial. The species is cultivated on a commercial scale in New Zealand, Australia, Chile, and South Africa. It has also been successfully cultivated in Spain, France, Argentina, Greece, and India, and a variety of Radiata pine is also reported to grow in Guadeloupe Island and Mexico. The tree prefers to grow on slopes, in coarse soils, usually sandy loams, and is often found in pure stands or with Monterey cypress, Gowen cypress, and Coast live oak.
Product Sources
The largest Radiata pine resource in the world is believed to be in Chile, where the climate is reported to be quite favorable for the cultivation of Radiata pine. Radiata pine trees grown on plantations in Chile are reported to be often ready to harvest in 16 to 25 years. The species is also grown for commercial consumption on plantations in several countries, including New Zealand, Australia, and South Africa. It is reported to be the most often planted softwood in both temperate and warm climates, with most of the timber on the market originating from plantation grown trees.
Reports from New Zealand indicate that there are currently (March, 1995) no independently certified sources of Radiata pine. Local laws governing the management of New Zealand plantation forests prohibit activities that will adversely affect the environment. Certified wood products are, however, expected to become available in the near future. Most of the exports from New Zealand are reported to be in the form of two-by-four sawn boards for construction and logs to Australia, Asia, and some to the United States.
Tree Data
The tree usually has a straight trunk, and grows to a height of about 50 to 100 feet (15 to 30 m), with a diameter of about 12 to 36 inches (30 to 90 cm). The tree is reported to be rather fast growing, and can reach mature size in 20 years. The tree is reported to be popular as an ornamental tree in England, the Mediterranean and in North Africa.
Heartwood Color
The heartwood is generally pink-brown in color.
Grain
The material may contain spiral grain, but it is generally straight-grained.
Texture
Compared to other pines, there is little contrast in the appearance of the growth rings, which makes the texture relatively even and uniform.
Odor
There is no characteristic odor or taste.
Ease of Drying
The material is reported to dry, but conditions should be controlled to prevent excessive degrade.
Drying Defects
The timber of Radiata pine is reported to season easily and rapidly at high temperatures (commercially up to 120 degrees C) with medium shrinkage.
T/R Ratio - 2.33
This indicator is more meaningful if it is used together with other drying information and actual shrinkage data in the tangential and radial directions. (Refer to the Numerical Values window).
Natural Durability
Heartwood is reported to have very little natural resistance to attack by decay fungi and other wood destroying organisms, and is prone to damage by insects.
Resistance to Impregnation
Most of the timber sold on the market are reported to be readily permeable sapwood from young, rapidly grown plantation trees. They are reported to be easily treated by immersion.
Cutting Resistance
The material is reported to saw relatively easily.
Planing
Radiata pine is reported to work rather easily and responds to thin and very sharp cutting edges well, with little dulling effect. Area around knots may tear, but most machining operations, including planing, turning, moulding, and boring generally produce a clean finish.
Gluing
Gluing properties are reported to be satisfactory.
Nailing
The timbers are reported to possess good nail-holding characteristics.
Screwing
Screw holding properties are rated as good.
Staining
The wood is reported to respond well to staining.
Polishing
Polishing properties are rated as satisfactory, and Radiata pine is reported to accept a wide variety of paints.
Strength Properties
Strength properties are reported to be rather low in bending and stiffness, and crushing strength and shock resistance are rated as moderate. Most of the commercially available timber of Radiata pine is reported to be composed of fast grown plantation trees. These trees are reported to contain very high percentage of sapwood which makes them very easy to treat with preservatives. Radiata pine is reported to be steadily growing as a replacement for the more expensive Ponderosa pine in the United States. Genetic improvements in Chile have resulted in Radiata pine trees that are relatively free from knots and are also high in physical and mechanical properties.
