Type of Sawn Timber (Durian Batu)
The Standard Malaysian Name for the timber of Coelostegia spp., Durio spp., Kostermansia sp. and Neesia spp. (Bombacaceae). Vernacular names applied include durian (Peninsular Malaysia, Sabah and Sarawak) with various epithets as well as other localised names too numerous to list here. Major species include Coelostegia borneensis, C. griffithii; Durio carinatus, D. grandiflorus, D. graveolens, D. lowianus, D. malaccensis, D. oxleyanus, D. singaporensis, D. wyatt-smithii, D. zibethinus; Kostermansia malayana; Neesia altissima, N. kostermansiana, N. malayana and N. synandra.
The Standard Malaysian Name for the timber of Coelostegia spp., Durio spp., Kostermansia sp. and Neesia spp. (Bombacaceae). Vernacular names applied include durian (Peninsular Malaysia, Sabah and Sarawak) with various epithets as well as other localised names too numerous to list here. Major species include Coelostegia borneensis, C. griffithii; Durio carinatus, D. grandiflorus, D. graveolens, D. lowianus, D. malaccensis, D. oxleyanus, D. singaporensis, D. wyatt-smithii, D. zibethinus; Kostermansia malayana; Neesia altissima, N. kostermansiana, N. malayana and N. synandra.
Charactieristic of sawn timber (Durian Batu)
- DENSITY : Durian is a Light Hardwood with a density of 420-865 kg/m3 air dry.
- NATURAL DURABILITY : In temperate countries, the threat of 'infestation' by both insects and fungi are very much reduced and the durability of the timber will be greatly extended
- PRESERVATIVE TREATMENT :It is easy to treat with preservatives.
- TEXTURE : Moderately coarse to coarse and even in Neesia but uneven in Durio and Coelostegia, with straight to slightly interlocked grain
- AIR DRING : Seasoning properties vary according to species. Start from fairly slow drying up to moderately fast drying depending type of timber.
Additional Info woods
- STRENGTH PROPERTIES : The timber falls into Strength Group C (Engku, 1988b) or SG 6 (MS 544:Part 2:2001).
- MACHINING PROPERTIES: Easy to slightly difficult to resaw and easy to difficult to cross-cut. Planing is easy to moderately easy and the planed surface is smooth to moderately smooth
- NAILING PROPERTY : Good To Excellent
- KILN DRYING : can be kiln-dried at a moderately fast rate with only slight twisting except for the timber of D. oxleyanus, which requires up to 1.5 months to dry boards of 70 mm x 127 mm with variable lengths. It is also recommended that sawn timber of durian be air dried for a minimum period of 2 weeks before being kiln-dried to save on cost.
- DEFECTS : All the timber producing species of the Bombacaceae are normally sound and free of defects except for a small area of sponginess around the pith, and damage by ambrosia and, occasionally, longicorn beetles. However the compression failures usually associated with this type of defect have not been encountered and not very susceptible to sap stain, however it is liable to attack by all forms of wood-boring insects and to heavy infestation by Lyctus due to starch in Durio type. On the other hand, the limited amount of material of N. altissima that has been examined contained very little starch and was attacked only by a small number of pin-hole borers.
- USES : Suitable for light construction under cover, flooring, door and window frames, panelling, mouldings, partitioning, planking, joinery, cabinet making, furniture, cooling tower (non-structural purposes), railway sleepers, pallets (expendable type), plywood, joists (for light construction only), wooden sandals and low grade coffins.
Other type of sawn timber
Collaboration
