Roofing / Decking/ Steel Fibre 

It is native to Brunei; Flores, Java, Kalimantan and Sumatra in Indonesia; the Sabah and Sarawak states of Malaysia; and the Sulu Archipelago of the Philippines.

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The heartwood when cut is coloured light brown to almost bright yellow. During the aging process the heartwood darkens to deep reddish brown, very dark brown or almost black. The sapwood is bright yellow when cut, and darkens slightly. The wood texture is fine and even, with a straight grain or only slightly interlocked. The timber retains a pleasant lemon odour.

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Due to the excellent resistance to bacterial, fungal, insect and marine borer attack the wood is highly prized for many outdoor uses.

 

Durability: heartwood is rated as very durable – immune to termite attack; service life of up to 100 years in direct soil contact and more than 20 years for marine work in tropical waters has been reported.

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Source from : https://en.wikipedia.org/wiki/Eusideroxylon_zwageri