Type of timber ( A ) HARD AND HEAVY Chengal Ship, framework. Sculpture Balau Bridge, track, floorT Beam, door framework / windowY KekatungPE Merbau Parquet, furniture, ornamental work Resak Pile, floor, ship, framework Tembusu Heavy construction, furniture
Kayu chengal Kayu kekatung Kayu balau Kayu resak Kayu tembusuKayu merbau
B) HARD AND MODERATELY HEAVY Heavy construction, stringer,kempas panel, bridge, cerocokkeruing Construction general, post, track, bridge, carriage kapur Truss, beam, post Post, beam, parquet,tualang floor, furniture
Kayu kempas Kayu kuriungKAYU KAPUR Kayu tualang
Defective of timber Cause by: natural draying moss prcosessing insert
Type of defect book Grain kink Crack fan spin Star check mengeledingRound shake curved Grain angular breach
Dry rotBeetle drill wood Wooden slow pest mushroom Wooden worm Wood changing brown colour Furniture beetle Soft, crack lyctus beetle Wood cannot bearDeath watch beetle Easy in break
Advantage and disadvantage oftimberadvantage disadvantageSoft Not homegeneous, there is timber yard, slanting fibre, inequality as nature plant result.Have been worked easily Behave higroskopis namely impressionable by change humidity of the airCheap prise inflammableSufficiently high strength The existence of disabled on wood when grow timber yard , crack , staleEnough preserve
plywood A number of thin veneers or plies of softwood or hardwood glued together. The reason the use : * dimensionally stable, * less cracked, * will not warp, shrink, and impartial. Advantages of plywood : * Size standard / standard size (4 feet x 8 feet is the normal size) *Low cost for size *strength * Stability (warping and shrinkage problems are rare)
Grade of plywood : * "A" is the highest quality grade available. The surface is usually smoothed and flatsurfaces can be painted. * "B "grade quality veneer as the second best. has a solid surface. Wood surface is usually smoothed. * "C" is low quality, but still be an option for use in construction. This panel is usually not smoothed. * "D" is low quality and usually used for the rear surface in the construction industry. Grade "D" has never been repaired or smoothed. not recommended for use as a permanent weather elements.
Medium density fibreboard(MDF) Sources : MDF is a type of hardboard, which is made from wood fibres glued under heat and pressure. Advantages : *It is dense, flat, stiff, has no knots and is easily machined. * MDF can be painted to produce a smooth quality surface. *MDF may be glued together with PVA wood glue. Oil, water-based paints and varnishes may be used on MDF. *Veneers and laminates may also used to finish MDF
Disadvantages : *MDF contains a substance called urea formaldehyde, may cause irritation to the eyes and lungs. *facemasks are needed when sanding or cutting MDF . * MDF contains a great deal of glue the cutting edges of your tools will blunt very quickly. Uses : * It may be used to make display cabinets, *wall-panels and storage units.
chipboard/ particleboard Sources: -Gluing together wood particles with an adhesive, under heat and pressure makes chipboard. This creates a rigid board with a relatively smooth surface. Chipboard is available in : *normal - is fairly soft *medium - between normal and high density , only suitable for internal use *high-density - is solid and hard Uses : kitchen tops and fire doors
Disadvantages : All grades of chipboard except the high- density variety tend to soak up water. Once it is water logged, chipboard tends to swell and breakdown. Uses: -High-density : as the carcass for kitchen units and worktops and flooring. * hardwearing, rigid and heavy. - standard : flame-retardant, flooring, and moisture-resistant.