The other common name used in Australia is Apitong
and although there are over 70 species of the Dipterocarpus
grouping other common names like Eng, Gurjun,
Yang and Bagac are not used in Australia.
Keruing is a medium to large hardwood native
to all the areas of South East Asia stretching as far as India, Sri
Lanka and Burma. It grows in a very wide
range of soil and climatic conditions from the low sea level forests to
very high mountain areas and with a height range from 30 to 50 metres.
The timber needs to be slowly and
carefully dried to avoid splitting and end checking because of its medium to
high shrinkage rate between 3.5 to 7%. It does work well when processed
correctly but some tearing may occur on quartercut
The texture of the timber varies
greatly but is usually fine to coarse generally straight grained and
lacking in any distinct figure. The high presence of resin in some of the
species can make it difficult to glue and paint.
Because of the wide species range
heartwood colour is quite varied from pinkish brown, purple, orange-pink to
the most common pale to dark reddish brown with most darkening with age. The sapwood, which is lyctid borer susceptible, is usually paler, from light
grey to pale yellowish brown being up to 100mm in width and is sometimes
difficult to distinguish.
In South East Asia Keruing is used for general building and joinery
applications and commonly in commercial flooring products such as container
bases and truck trays.
Although only small quantities are
imported into Australia
it generally tends to be the higher grade timber being used for internal
joinery such as staircase material, furniture and flooring.
800–950 kg m3 green
600–750 kg m3 dry
Durability: Class 3/4
Hardness Rating (average)
3.5 kN green
5.5 kN dry