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Other species | Overseas equivalent In ( Dipterocarpus tuberculatua )
Strength: In is hard and strong. Movement: Shrinkage from green to oven-dry is 4.4% radially and 9.1% tangentially. Durability & Preservation: Classed as moderately resistant to decay, but not resistant to termites. It is durable under cover, but not so in exposed condition. When treated with oil and creosote, it lasts for 8 years under tropical conditions. The timber lends itself to preservative treatment, but complete penetration is not always obtained. Ingyin ( Pentacme siamensis )
Strength: Ingyin is very hard and strong.
Movement: Considerable movement. Shrinkage from green to oven-dry is about 4.8% radially and 8.9% tangentially. Durability & Preservation: A very durable timber and proof against white ant. Treatment is very difficult as the timber is hard and heavy. Treatment is normally not required as it is naturally durable. Kanyin ( Dipterocarpus spp )
Strength: The Kanyins are strong woods, but the properties vary according to the species. Movement: Shrinkage from green to oven-dry is in the range of 7.5-11.5% tangentially and 2.5-5.5% radially. Durability & Preservation: Moderately durable. Not resistant to termite attack. Durable under cover,but not when exposed or when in contact with the ground. Resistance to preservative treatment varies from moderately resistant to resistant. Sapwood is moderately resistant. Pyinkado or Iron wood ( 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 & Preservation: Very durable and resistant to termite attack, but not entirely immune from it. It is also resistant to marien borers. The heartwood is extremely resistant to preservative treatment and sapwood is moderately resistant. Padauk or Rosewood ( Pterocarpus macrocarpus )
Strength: Padauk is one of the heaviest, hardest and strongest timber in South-East Asia.
Movement: Small and definately steady. Shrinkage from green to oven-dry is approximately 2.8% radially and 3.9% tangentially. Durability & Preservation: Extremely durable and resistant to termites. Extremely resistant to preservative treatment, but does not require it generally. Untreated timber under most severe conditions lasts more than 12 years. Taukkyan ( Terminalia tomentosa )
Strength: Taukkyan is hard and strong timber. Movement: Shrinkage values from green to oven-dry is approximately 4.7% radially and 7.1% tangentially. Durability & 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. Thitya ( Shorea oblongifolia )
Strength:Thitya is hard and strong.
Movement: Approximate shrinkage from green to oven-dry is 5.4% radially and 9.7% tangentially. Durability & Preservation: Extremely durable and hard. Untreated sleepers last for 15 years. Durable in contact with the ground or water. White ant proof and no fungus attack. Extremely resistant to preservative treatment.
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