Radiata Pine

Pinus Radiata

Pine decking is one of the cheapest materials which can be used as a decking option, as it is forested locally. Although cheap and not as durable as hardwoods, if installed maintained correctly, a pine deck may last from 5 – 10 years.

Pine Timber has a very distinct colour to it, as its heartwood is light brown, it’s wide sapwood is a paler yellowish white and is distinct from the heartwood. Pine is generally plantation-grown, and has very wide growth rings and is knotty. The texture is straight grained with a medium even texture.

Product Specifications


West Coast United States

Tree Size:

24 – 30m

Trunk Diameter:

600 – 1 000m

Average Dried Weight:

515 kg/m3

Common Lengths:

1,8 – 4.8m (300mm intervals)

Common Dimensions:

22 x 105mm

32 x 105mm

20 x 100mm

Joist Spacing:

450mm CTC

600mm CTC

350mm CTC

Pine is the most commonly used timber in South Africa. We have vast plantations of this material which, with Eucalyptus, makes up the bulk of our structural timber. The same pine is used for many of the decking frames being built, and although not a durable species, when treated with CCA (Copper Chromium Arsenic) this timber can perform extremely well. The major benefit to this species is the price factor.

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Timber Comparisons

Timber is an organic product, as such, many people don’t realise that timber performance can be measured and averaged. These numbers are well documented and accessible to the consumer. They can tell you all you need to know about what to expect from a particular timber. We believe your choices should be based on fact and not perception or “hear say”. To make it easier to decipher these numbers, we have placed a table below that compares the various hardwood decking timbers On The Deck supplies. We then decipher what each analysis effectively means to your particular project.

  Pine Massaranduba Red Balau Garapa Rhodesian Teak Saligna Cumaru
Janka Hardness (lbs) 710 3 130 1 600 1 650 2 990 1 260 3 540
Dry Weight (kg/m3) 515 1 080 850 820 890 640 1 085
Modulus of Rupture (MPA) 79.2 192.2 122.3 127.8 84.3 107.8 175.1
Elastic Modulus (GPA) 10.06 23.06 16.95 15.57 8.48 14.15 22.3
Shrinkage Radial (%) 3.4 6.7 5.5 4.2 2.6 5.9 5.3
Shrinkage Tangential (%) 6.7 9.4 10.1 7.5 4.5 10.1 7.7
Shrinkage Volumetric (%) 10.7 16.8 15.7 11.4 6.9 15.5 12.6
T/R Ratio 2 1.4 1.8 1.8 1.7 1.7 1.5
Durability Class Rating Class 3* Class 1* Class 2* Class 1* Class 2* Class 3* Class 1*

* Class 1 = Highly Durable | Class 2 = Durable | Class 3 = Moderately Durable

Timber being a natural and organic material means that each and every species is different and has unique properties which makes them suitable for a range of different applications and uses. We have simplified the main properties that are measured and put it into an easy to read and simplified version so that the numbers relate back to how the timbers perform.


Pine Properties

Janka Hardness

It is an extremely fast growing species, hence its favourability as a plantation timber. Due to this, it is extremely soft and dents easily.

Dry Weight

It is a lightweight timber making it easy to machine.

Modulus of Rupture

It does not score high compared to the hardwood decks available. That being said, it is not far off Rhodesian Teak in terms of strength. It is by no means a “weak’ timber. Its lightweight factor as well as reasonable strength is why its used as a structural timber.

Elastic Modulus

It does score higher than Teak here but still not all that great.

Shrinkage and T/R Ratio

This timber is fairly stable. Its T/R ratio is quite high and the timber is known to distort. It is better to quickly install it once you have released the strapping.


Pine In Application

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