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Task – name 10 objects made of wood that is in close proximity to you.

Wood. Task – name 10 objects made of wood that is in close proximity to you. pine oak beech walnut maple zebrawood mahogany ash. Wood. Can you name any types of wood?.

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Task – name 10 objects made of wood that is in close proximity to you.

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  1. Wood Task – name 10 objects made of wood that is in close proximity to you.

  2. pine oak beech walnut maple zebrawoodmahogany ash Wood Can you name any types of wood? pine, oak, ash, teak, mahogany, maple, sycamore, birch, beech, walnut, cherry, zebrawood, balsa……. Can you think of words that describe wood? warm, smooth, strong, flexible, strong, hard, soft, rough, ….

  3. There are 3 main types of timber: Wood TIMBER is the general name for wood materials. • HARDWOOD • SOFTWOOD • MANUFACTURED BOARD

  4. Model aircraft made from balsa Hardwood This type of timber is produced from broad leaf trees that lose their leaves in winter – a deciduous tree. The photograph opposite is of an oak tree which grows in this country. The term hardwood does not mean that the timber is hard. For example balsa is used for modelling, it is a hard wood but it is one of the softest timbers to work with. Uses - Oak is a hardwood and is used to make expensive furniture/flooring and strong framed structures.

  5. Hardwood Mahogany – reddish in colour, always looks good when varnished or waxed. Beech – creamy pinkish colour, its close grain makes it very suitable for kitchen utensils, as water does not have too great an effect on it. Task – Can you think of other uses of wood products in the kitchen.

  6. Softwood This type of timber is produced from trees that do not lose their leaves (coniferous). Softwood trees grow much quicker than the hardwood ones, they are therefore cheaper to buy and far more available. Softwood is used for construction of houses and furniture, and outdoor uses such as fencing. Leaves are easily identified as being thin and narrow. The term softwooddoes not mean that the timber is soft , as pitch pine is one of the most difficult timbers to work with, yet is a member of this group Some photograph courtesy of photolibrary wales

  7. packaging garden fencing/shed building construction Uses of soft woods furniture Some images courtesy of IKEA

  8. Manufactured board These are manmade boards, which are made by gluing wood layers or wood fibers together. Examples of manufactured boards are: Plywood is a widely used manufactured timber. Can you think of advantages and disadvantages of using plywood? The photograph opposite shows MDFsheets as they are purchased. What does MDF stand for ? Any thoughts regarding its use ? Manufactured board is mainly used for kitchen and bedroom furniture and shelving.

  9. carve it… you can …… layer it … Bend it ….. turn it ….. slot it together it ….. Do you recognise any of these buildings/structures? Jules Tattersall

  10. Milling Lumber

  11. Economics of Log Use $ Maximum Use of Log $$$ $$ Range of different cuts

  12. Distortion due to shrinkage depends on location within the log…

  13. Difference in Wood Movement in Plain-sawn versus Quarter-sawn Boards

  14. Drying Wood Before wood is used, the water contained in its cells must be removed under controlled conditions to minimize distortion and maintain quality of the finished product. Both ‘free’ water and most ‘bound’ water must be removed during the drying process. Boards are then kiln-dried to remove bound water to the target EMC level. Stickered boards are air-dried to about 30% MC to remove free water.

  15. Bound Water Free Water Moisture Content, % 0 15 30 50 100 5 10 OD KD AD FSP “Green Wood” EMC in this range Range of Shrinking and Swelling Uniform, fully swollen dimension

  16. Equilibrium Moisture Content Ranges by Geographic Region

  17. The Diversity of Wood

  18. Commonly Used Hardwoods Cherry Red Oak Walnut Maple

  19. myrtle pearwood ziricote bocote snakewood lacewood H. mahogany padauk wenge leopardwood zebrawood jarrah burl narra pink ivory

  20. Woods From the same Family (Fabaceae) Cocobolo Dalbergia retusa Wenge Millettia laurentii Purpleheart Peltogyne sp. Zebrawood Microberlinia brazavillensis Honey Locust Gleditsia triacanthos Pernambuco Caesalpinia echinata

  21. Similar appearances….. Cocobolo Dalbergia retusa Fabaceae Bocote Cordia eleagnoides Boraginaceae

  22. Imperfections in Wood Knots http://www.vermonttimberworks.com/images/shake.jpg

  23. Warped Lumber

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