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Contents : Common name: NYATOH Family: Scientific name(s): Note: SAPOTACEAE Palaquium spp. NYATOH is the name given to the light and medium SAPOTACEAE woods (Payena Ganua and especially Palaquium) the name BITIS is given to heavy woods . LOG DESCRIPTION Diameter: Thickness of sapwood: Floats: Durability in forest : Note: WOOD DESCRIPTION from 50 to 100 cm Colour: from 4 to 9 cm Sapwood: no Texture: Moderate (treatment Grain: recommended) Interlocked grain: Wood dark pink to red brown. Grain sometimes wavy. Red brown Clearly demarcated Medium Straight or interlocked Slight PHYSICAL PROPERTIES MECHANICAL PROPERTIES Physical and mechanical properties are based on mature heartwood specimens. These properties can vary greatly depending on origin and growth conditions. mean standard deviation mean standard deviation g/cm3 0.57 0.06 Density *: 7 53 MPa 2.6 0.6 Monnin hardness*: Crushing strength *: 0.03 Coef of volumetric shrinkage: 0.48 % 13 83 MPa Static bending strength *: 7.7 % 0.8 Total tangential shrinkage: 2150 12770 MPa 4.1 % 0.5 Modulus of elasticity *: Total radial shrinkage: 29 % Fibre saturation point: stable ( * : at 12 % moisture content 1 MPa 1 N/mm2 ) Stability: Wood properties vary according to the different species. Note: NATURAL DURABILITY AND TREATABILITY Fungi and termite resistance refers to end-uses under temperate climate. Except for special comments on sapwood natural durability is based on mature heartwood. Sapwood must always be considered as non-durable against wood degrading agents. Fungi: Dry wood borers: Termites: Treatability: Use class*: Note: * ensured by natural Class 3 moderately durable durability (according Durable sapwood demarcated (risk limited to sapwood) EN standards). Class S - Susceptible 3 - poorly permeable 2 - inside or under cover (dampness possible) Several species are grouped under the name NYATOH of the genus Palaquium and the natural durability is variable from one species to another. It is thus recommended to restrict the use without preservative treatment for end-uses under use class 2. MAIN LOCAL NAMES Countries Local names India PALI Indonesia NYATOH Malaysia (islands) RIAM Peninsular Malaysia MAYANG Peninsular Malaysia NYATOH Peninsular Malaysia TABAN Papua New Guinea PENCIL CEDAR Philippines NATO Thailand KHA-NUNNOK Vietnam CHAY Italia NYATOH Netherlands BALAM United Kingdom NYATOH United Kingdom PADANG TROPIX 6.0 - copyright : CIRAD 24/03/2009 Page 1 / 2 NYATOH REQUIREMENT OF A PRESERVATIVE TREATMENT Against dry wood borer attacks: In case of temporary humidification risk: In case of permanent humidification risk: Does not require any preservative treatment Requires appropriate preservative treatment Use not recommended Possible drying schedule DRYING Drying rate: Risk of distortion: Risk of casehardening: Risk of checking: Risk of collapse: Normal to slow High risk No High risk No M.C. (%) Temperature ( C) dry-bulb wet-bulb Green 40 30 20 15 50 50 55 70 75 47 45 47 55 58 Air humidity (%) 84 75 67 47 44 This schedule is given for information only and is applicable to thickness 38 mm. It must be used in compliance with the code of practice. For thickness from 38 to 75 mm the air relative humidity should be increased by 5 % at each step. For thickness over 75 mm a 10 % increase should be considered. SAWING AND MACHINING Blunting effect: Sawteeth recommended: Cutting tools: Peeling: Slicing: Note: High Stellite-tipped Tungsten carbide Good Good Very variable silica content according to species. Sawdust may cause irritations. ASSEMBLING Nailing / Screwing: Gluing: Good but pre-boring necessary Correct END-USES Main known end-uses they must to be implemented according to the code of practice. Important remark: some end-uses are mentionned for information (traditional regional or ancient end-uses). Current furniture or furniture components Cabinetwork (high class furniture) Interior joinery Exterior joinery Interior panelling Sliced veneer Veneer for back or face of plywood Light carpentry Flooring Turned goods Moulding TROPIX 6.0 - copyright : CIRAD 24/03/2009 Page 2 / 2

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