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::Teak::

English	France

Common name:

Teak

Family:

VERBENACEAE

Scientific name(s): Tectona grandis

LOG DESCRIPTION WOOD DESCRIPTION

Diameter:

from to cm

50 100

Colour:

Yellow brown

Thickness of sapwood:

from to cm

2 6

Sapwood:

Clearly demarcated

Floats:

Texture:

Coarse

Durability in forest :

Good

Grain:

Straight

Interlocked grain:

Absent

Note:

The wood darkens and presents golden glints with age. Sometimes black brown veins. Oily to the

touch.

PHYSICAL PROPERTIES

MECHANICAL PROPERTIES

Physical and mechanical properties are based on mature heartwood specimens. These properties can vary greatly depending on

origin and growth conditions.

mean standard deviation

Density *:

0.67

g/cm3

0.06

Monnin hardness*:

4.2

1.3

Coef of volumetric shrinkage:

0.34

0.07

Total tangential shrinkage:

4.7

0.8

Total radial shrinkage:

2.6

0.4

Fibre saturation point:

Crushing strength *:

MPa

Static bending strength *:

MPa

Modulus of elasticity *:

13740

MPa

2749

Stability:

stable

( * : at 12 % moisture content ; 1 MPa = 1 N/mm2 )

Note:

The properties of timbers grown in plantation or in naturel forest are often similar, except for

durability.

NATURAL DURABILITY AND TREATABILITY

Fungi and termite resistance refers to end-uses under temperate climate.

Except for special comments on sapwood, natural durability is based on mature heartwood.

Sapwood must always be considered as non-durable against wood degrading agents.

Fungi:

Class 1 - very durable

* ensured by natural durability (according EN standards)

Dry wood borers:

Durable; sapwood demarcated (risk limited to sapwood)

Termites:

Class M - Moderately durable

Treatability:

4 - not permeable

Use class*:

4 - in ground or fresh water contact

Note:

The durability of teak wood from plantation is much lower than that of the teak from natural

Note:

forest. It is moderately resistant to fungi and classified as sensible to durable against termites.

This species is listed in the standard NF EN 350-2 which makes a difference between the Teak

from Asia (meaning natural forest) and the teak planted in Asia and other countries; the first one

is classified in the natural durability class 1 towards fungi and in natural durability class M

towards termites; the second is in the natural durability class 1-3 towards fungi and in natural

durability class M-S towards termites.

The use class mentioned in Tropix is given for teak from natural forest. According to the

European standard NF EN 335, performance length might be modified by the intensity of

end-use exposition.

This species naturally covers the use class 5 (end-uses in marine environment or in brackish

water) due to its high silica content.

MAIN LOCAL NAMES
Countries	Local names	Countries	Local names
India	SAGWAN	Germany	JAVA TEAK
India	TEAK	Germany	TEAK
Indonesia	JATI	Italia	TECK
Indonesia	TEK	Netherlands	TEAK
Laos	MAY SAK	United Kingdom	TEAK
Myanmar	KYUN	Vietnam	GIATI
Thailand	MAY SAK	France	TECK
Thailand	TEAK

TEAK

REQUIREMENT OF A PRESERVATIVE TREATMENT

Against dry wood borer attacks:

Does not require any preservative treatment

In case of temporary humidification risk:

Does not require any preservative treatment

In case of permanent humidification risk:

Does not require any preservative treatment

DRYING

Possible drying schedule

Drying rate:

Slow

Risk of distortion:

No risk or very slight risk

Risk of casehardening:

Risk of checking:

No risk or very slight risk

Risk of collapse:

Temperature (°C)

dry-bulb

Air humidity (%)

wet-bulb

M.C. (%)

Green 42 41 94

50 48 43 74

30 54 46 63

20 60 51 62

15 60 51 62

This schedule is given for information only and is applicable to thickness < 38 mm.

It must be used in compliance with the code of practice.

For thickness from 38 to 75 mm , the air relative humidity should be increased by 5 % at each step.

For thickness over 75 mm , a 10 % increase should be considered.

Note:

The drying rate may vary from one board to other by reason of the specific gravity and the

important differences of moisture content when green.

SAWING AND MACHINING

Blunting effect:

High

Sawteeth recommended:

Stellite-tipped

Cutting tools:

Tungsten carbide

Peeling:

Not recommended or without interest

Slicing:

Good

Note:

Variable silica content. Sawdust may cause skin irritations.

ASSEMBLING

Nailing / Screwing:

Good but pre-boring necessary

Gluing:

Correct

Note:

Pre-boring recommended due to a slight tendency to split when nailing. Satisfactory gluing on

surfaces freshly machined or sanded (the wood contains oleoresins).

END-USES

Main known end-uses; they must to be implemented according to the code of practice.

Important remark: some end-uses are mentionned for information (traditional, regional or ancient end-uses).

Ship building (planking and deck)

Interior joinery

Interior panelling

Open boats

Cabinetwork (high class furniture)

Sliced veneer

Flooring

Stairs (inside)

Cooperage

Turned goods

Exterior joinery

Exterior panelling

Light carpentry

Rolling shutters

Bridges (parts in contact with water or ground)

Bridges (parts not in contact with water or ground)

Posts

Stakes

Arched goods

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