Kaw Udu (Tatajuba)

Bagassa guianensis & tiliaefolia

Commercial Name(s): Tatajuba
Other Name(s): Amarelao, Bagasse, Odoun, Jawahedan, Bagaceira, Cow-Wood, Kaw Oudou
Botanical Name: Bagassa guianensis & tiliaefolia
Botanical Family: Moraceae
SBB Code: KAW

Shrinkage Radial (RS)
3.7%
ShrinkageTangential (TS)
5.2%
Coeff. Volumetric Shrinkage
0.53%

Profile

Tatajuba freshly cut, the heartwood is yellow. It becomes yellow brown to dark brown with age. The sapwood is clearly demarcated. The grain is interlocked and the texture is medium. Density at 12 % moisture content: 0.80 g/cm3. The blunting effect is normal and slicing is reported to be good. Sawdust is sometimes irritant. Presence of internal stresses. Nailing is good but pre-boring is necessary. Gluing is correct. It dries normal to slowly. High risks of distortion in presence of highly interlocked grain. During drying, spacer sticks may stain the wood.

Tatajuba is very durable to fungi and is durable to dry wood borers; sapwood demarcated (risk limited to sapwood). Due to its high silica content, this species naturally covers the biological hazard class 5 (end-uses in marine environment or in brackish water).

Tatajuba can be used for several applications such as:
• interior: e.g. flooring, sliced veneer, high class furniture, stairs, panelling, joinery, moulding
• exterior: e.g. ship building, wood frame house, panelling, bridges, sleepers, joinery, heavy carpentry, vehicle or container flooring.

Typical use

Interior joinery, Sliced veneer, Hydraulic works (fresh water), Exterior panelling, Bridges (Parts not in contact with water or ground), Turned goods, Vehicle or container flooring, Current furniture or furniture components, Ship building (ribs), Wood frame house, Interior panelling, Sleepers, Exterior joinery, Bridges (Parts in contact with water or ground), Heavy carpentry, Stairs (inside), Moulding, Flooring, Ship building (planking and deck), Cabinetwork (high class furniture).


Technical Information

Color: Orange yellow, on exposure dark brown
Trees Size: 20 – 30 m
Trunk Diameter: 0.6 – 1.00 m
Monnin Hardness: 6.4
Crushing Strength (Mpa): 69 – 87
Basic Specific gravity: 0.73 – 0,87
Density (kg/m3): 0.80
Grain: Irregular and interlocked
Texture: Medium to coarse
Static bending strength (Mpa): 109
Modulus of elasticy (Mpa): 21490
T/R Ratio: 1.4
Finish: Excellent
Stability: Stable


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