Definition Types Properties Advantages Disadvantages Uses To think about Gabriela Méndez Gloria Palacios.

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Presentation transcript:

Definition Types Properties Advantages Disadvantages Uses To think about Gabriela Méndez Gloria Palacios

Definition Wood is an organic material. It is produced as secondary xylem in the stems of woody plants, notably trees but also shrubs.xylemwoody plantstrees The wood acts as a protective layer and gives hardness to stems

Types. * Softwood: wood from conifers trees. (e.g. pine) * Hardwood: wood from dicotyledons (usually broad-leaved trees, e.g. oak These names are a bit misleading, as hardwoods are not necessarily hard, and softwoods are not necessarily soft

There exist another kind clasification for wood types: Bitter: Its “taste” is less enjoyable to termites. Sweet: Wood wich is more sensitive to termite attack.

Properties Physical Properties of wood: -Wood is a bad conductor of heat and electricity. -Good Dimensional stability -Low Density -Resistance to weathering -Durability -Wood contains a small percentage of moisture. Mechanical properties: - Wood has good elasticitty - Big Strength

Advantages *The wood is an excellent acoustic, thermal and electrical insulator. 15 times more insulating than concrete 400 times more than iron and almost 2000 more than aluminium!! *Is a tough material and has certain flexibility.It flexibility allows land movements or earthquake without cracking the structure. *Wood is more resistant than steel or concrete because in a fire keeps it structure and load capacity. *Low cost

Disadvantages *Moisture sensibility *Wood is liable to fungus and bugs attack. *Is requiered destroying a lot of forest worldwide to obtain low quantities of wood

Uses -Fuel. -Construction: Houses and boats. Roof construction, in interior doors and their frames, and as exterior cladding. Shuttering material. Raw material. -Arts: Sculptures and carvings. Woodcut for engraves. Musical instruments manufacture.

People have used wood for millennia for many purposes, primarily as a fuel or as a construction material for houses, tools, furniture, artworks and paper. Wood continues to be used in a growing number of techniques and products but we must pay attention to the world enviroment balance. To think about