Keruing Lumber

Keruing Lumber
Keruing Lumber Keruing Lumber Keruing Lumber
Product Code: Keruing Lumber
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Species: Keruing / Apitong Family: Dipterocarpaceae
Other Names: Eng (Burma, Yang (Thailand), Keroeing (Indonesia), Apitong (Philippines), Asian Mahogany (US).
Distribution: Widely scattered throughout Indo-Malaysian region; large number found in Malaysia, hence common Malaysian name: Keruing.
Habitat: Especially dominant species of lowland primary forest, but also common in mixed, and hill Dipterocarp forests.
The Tree: Reaches heights of over 100-200 feet (25-45 meters). Diameters of up to 3-6 feet (.75 - 1.5 meters). Usually straight, clear, cylindrical boles up to 70 feet long, above small buttresses.
Timber Properties: Classified as a medium hardwood. Heartwood varies from light red to dark brown, darkening on exposure; sapwood is distinct greyish-brown, usually 4-8 cm wide. Texture is coarse, but even and grain is usually straight. Strong resinous odor, taste and exudes resin which may be troublesome. Moderately durable and moderate resistant to preservation treatments, with similar overall properties to Teak hardwood.
Working Properties: There is much variance in sawing, depending on species. Generally saws and machines well. Blunting of blades common due to silica content. Sometimes difficult to glue and resin may interfere with finishes, Teak oil recommended.
Uses: Generally used in construction such as furniture, beams, rafters, flooring, decking, and bridges. Exterior uses should be treated with a Teak oil preservative. Production & Trade: By volume the largest export wood, by volume, in Peninsula Malaysia, and one of the largest in Sabah, Sarawak, and Indonesia.
Conservation Status: In general, Dipterocarpus spp. are still abundant throughout the region. FAO does not list it as threatened or endangered but calls on countries to urgently continue work in collection of species, in situ and ex situ conservation.
Color: Pink-brown to dark brown, sometimes with a purple tint.
Weight: Between 690-960 kg/m 3 (40-60 lb/ft3) Average 740 kg/m3 (46 lb/ft3) D. tuberculatus weighs 880 kg/m3 (55 lb/ft3)
Specific Gravity: Average .74 and .88 respectively.
Mechanical Properties: • Bending strength - High • Crushing strengths - High • Stiffness - High • Resistance to shock loads - Medium Keruing Timber Seasoning: These timbers dry slowly and are difficult to dry uniformly from the center outwards in thick stock or quartered stock. Distortion, especially cupping, is rare & slight. There is little shrinkage in drying and large movement in service. Working properties: These vary according to species but blunting is from moderate to severe when the woos also contains silica. Tungsten carbide saws are advised. Straight grain stock machines cleanly but with a fibrous finish. Planing requires a reduced cutting angle of 20 degrees on interlocked grain. Resin adhering to tools, machines, and fences can be troublesome. Nailing is satisfactory and gluing results are variable. The timbers stain well, but varnishing or polishing require care due to the stain.
Durability: Moderate. Similar to Tectona (Teak). Resistant to attack by powder post beetle, termites. Keruing Log Uses: • Wharf & ship decking • Bridges • Flooring in homes and public buildings • Vehicle building • Sills • Wagon sides and floors • Exterior joinery • Outdoor furniture

Indochine Decor Limited Partnership
Indochine Development Company Limited
Factory, Office, Showrooms & Warehousing :
32 - 32/2, Moo 2, Tambon Onkang,
Amphur Mae On, Chiang Mai 50130,
Indochine Industries Limted Partnership
Saw Mill & Factory : Highway 13, Vang Vieng,
Vientiane, Laos
Tel : +66-53-859125 Thailand (+66) (GMT +7:00) Bangkok, Thailand
Fax : +66-53-859478
Mobile : +66-89-7558338
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