Teakwood ( Tectona grandis )
Strength: Teakwood is strong, moderately elastic and hard.
Movement: Small and exceptionally steady. Shrinkage from green to oven-dry is approximately 1.5% radially and 2.5% tangentially.
Durability and Preservation: One of the most naturally durable timbers of the world. Practically impervious to insects and white ants but not immune to marine borers. High in resistance to acid and fire. Lasts well in contact with or under water, and lasts indefinitely under water. Extremely resistant to preservative treatments.
| Moisture Content | Bending Strength | Mod of Elasticity | Compression Parallel To Grain | Hardness (Radial) | Impact Max Drop |
|---|
| % | N/mm3 | N/mm2 | N/mm2 | KG | mm |
| 14.1 | 100 | 12627 | 57.6 | 436 | 787 |
Pyinkado ( Xylia dolabriformis )
Strength: Pyinkado is a hard and extremely strong timber possessing high strength properties.
Movement: Medium. Shrinkage from green to oven-dry is approximately 3.3% radially and 6.7% tangentially.
Durability and Preservation: Very durable and resistant to termite attack, but not entirely immune from it. It is also resistant to marine borers. The heartwood is extremely resistant to preservative treatment and sapwood is moderately resistant.
| Moisture Content | Bending Strength | Mod of Elasticity | Compression Parallel To Grain | Hardness (Radial) | Impact Max Drop |
|---|
| % | N/mm3 | N/mm2 | N/mm2 | KG | mm |
| 10.3 | 142 | 17457 | 79.6 | 983 | 1270 |
Thingan ( Hopea Odorata Roxb. )
Strength: Strong, hard and elastic.
Movement: Shrinkage from green to oven-dry is about 3.4% radially and 6.5% tangentially.
Durability and Preservation: Naturally very durable. Untreated sleepers last for 16 years. Not attacked by white ants, rarely requires treatment and not difficult to treat.
| Moisture Content | Bending Strength | Mod of Elasticity | Compression Parallel To Grain | Hardness (Radial) | Impact Max Drop |
|---|
| % | N/mm3 | N/mm2 | N/mm2 | KG | mm |
| 12.1 | 95 | 11537 | 46.3 | 633 | 737 |
Taukkyan ( Terminalia tomentosa )
Movement: Shrinkage values from green to oven-dry is approximately 4.7% radially and 7.1% tangentially.
Durability and Preservation: Durable under cover, and moderately durable in exposed conditions. It is resistant to dry rot and white ants, but not entirely immune to it. It can be treated readily with preservatives.
| Moisture Content | Bending Strength | Mod of Elasticity | Compression Parallel To Grain | Hardness (Radial) | Impact Max Drop |
|---|
| % | N/mm3 | N/mm2 | N/mm2 | KG | mm |
| 13.2 | 106 | 13150 | 57.1 | 930 | 1219 |
