| Note: |
* species belonging to the sub-genus Rubroshorea. |
| |
RED LAUAN species come from the Philippines. |
|
|
| LOG DESCRIPTION |
WOOD DESCRIPTION |
|
|
| Diameter: |
from 80 to 120 cm |
Colour: |
Red brown |
| Thickness of sapwood: |
from 5 to 6 cm |
Sapwood: |
Clearly demarcated |
| Floats: |
no |
Texture: |
Medium |
| Durability in forest : |
Moderate (treatment recommended) |
Grain: |
Interlocked |
| |
|
Interlocked grain: |
Marked |
| Note: |
Frequent hollow tree (trees with a large diameter). |
| |
Wood red brown more or less dark. Slightly lustrous. Ribbon like aspect. Visible silver figure. |
| Presence of white lines (resin canals). |
|
|
| 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 |
|
mean |
standard |
| Density * |
0.65g/cm3 |
0.05 |
|
|
deviation |
| Monnin hardness*: |
2.7 |
0.5 |
Crushing strength *: |
50MPa |
5 |
| Coef of volumetric shrinkage: |
0.51% |
0.04 |
|
|
|
| Total tangential shrinkage: |
7.6% |
0.9 |
Static bending strength *: |
90MPa |
6 |
| Total radial shrinkage: |
4.3% |
0.7 |
Modulus of elasticity *: |
13290MPa |
962 |
| Fibre saturation point: |
29% |
|
|
|
|
| Stability: |
Moderately stable |
|
( * : at 12 % moisture content ; 1 MPa = 1 N/mm2 ) |
| Note: |
Hardness varies from soft to fairly hard. |
|
|
| 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 3 - moderately durable |
| * ensured by natural |
| durability (according |
| EN standards). |
|
|
| Dry wood borers: |
Durable; sapwood demarcated (risk limited to sapwood) |
| Termites: |
Class M - Moderately durable |
| Treatability: |
3 - poorly permeable |
| Biological hazard class*: |
2 - not in ground contact, under cover (dampness possible) |
| Note: |
Black holes quite frequent. |
|
|
| COUNTRIES - LOCAL NAMES |
|
| Countries |
Local names |
|
|
|
|
| Philippines |
RED LAUAN |
|
|
| Philippines |
TANGILE |
|
|
| Philippines |
TIAON |
|
|
|
|
|
|
|
| LAUAN RED |
|
| REQUIREMENT OF A PRESERVATIVE TREATMENT |
|
| Against dry wood borer attacks: |
Does not require any preservative treatment |
| In case of temporary humidification risk: |
Requires appropriate preservative treatment |
| In case of permanent humidification risk: |
Use not recommended |
|
|
| DRYING |
Possible drying schedule |
|
|
| Drying rate: |
Normal to slow |
|
Temperature (°C) |
Air |
| Risk of distortion: |
Slight risk |
M.C. (%) |
dry-bulb |
wet-bulb |
humidity (%) |
| Risk of casehardening: |
Yes |
|
| Risk of checking: |
Slight risk |
Green |
50 |
47 |
84 |
| Risk of collapse: |
No |
40 |
50 |
45 |
75 |
| |
|
30 |
55 |
47 |
67 |
| |
|
20 |
70 |
55 |
47 |
| |
|
15 |
75 |
58 |
44 |
|
| This shedule 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: |
Drying must be done with care to avoid risks of casehardening. |
|
|
| SAWING AND MACHINING |
|
| Blunting effect: |
Normal |
| Sawteeth recommended: |
Ordinary or alloy steel |
| Cutting tools: |
Ordinary |
| Peeling: |
Good |
| Slicing: |
Good |
| Note: |
Tendency to tear in planing. Keep sharp tools. |
|
|
| ASSEMBLING |
|
| Nailing / Screwing: |
Good but pre-boring necessary |
| Gluing: |
Correct |
| Note: |
Tendency to split in nailing. |
|
|
| 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). |
|
| Veneer for interior of plywood |
| Veneer for back or face of plywood |
| Sliced veneer |
| Current furniture or furniture components |
| Formwork |
| Interior joinery |
| Interior panelling |
| Exterior joinery |
| Exterior panelling |
| Stairs (inside) |
| Moulding |
| Cabinetwork (high class furniture) |
| Ship building (planking and deck) |
| Musical instruments |
| Boxes and crates |
| Light carpentry |
| Glued laminated |
| Flooring |
| Rolling shutters |
|
|
