1. WOOD Carla Rincón 09-10710 Jennifer Pacheco 09-10598

2. Content 1.History 2.Types of wood 3.Construction methods 4. Physical and mechanical properties 5. Advantages and disadvantages 6. Examples in architecture

3. WOOD… ask yourself What do you really know about this fascinating material? Would you use it to build your own house? Why or why not?

4. History Most ancient material used in construction Almost all masonry buildings of the past had wood floors and coverings The history of wood construction can be traced consistently in China, Korea, and Japan and in the domestic architecture of northern Europe and North America USA JAPAN EUROPE

5. Wood continues to be used in a growing number of techniques and products: heavy framing systems with compound beams and girders, interior and exterior facing with plywood and other composite panels, and arch and truss systems with laminated members that can be designed to meet particular structural demands It is used in floors, roofs, walls, structural and decorative elements and furniture. Cave restaurant in Sidney by koichi takada architects international spirit of nature wood architecture award. Jose Cruz Ovalle 2004

6. Types of wood 1. Softwood Lumber Common varieties are pine, fir, spruce, hemlock, cedar and redwood. These woods are mostly used in the home construction industry 2. Hardwood Lumber Popular domestic species are oak, maple, cherry, birch, walnut, ash and poplar. 3. Plywood and Manufactured Sheets consist of an uneven number of alternating layers of wood

7. Construction methods: 1. Solid system log construction -Primitive cutting tools. - Four walls are built up together in horizontal layers of single uncut logs and jointed at the corners. - The stability depends on the mutual support of the walls -Only suitable only for simple structures of limited size. 2. The skeletal system -Requires precise cutting and shaping of lumber. It provides a rigid framework of jointed members independent of the walls, which are attached to the exterior and interior surfaces after completion.

9. Wood properties Physical properties: Quantitative characteristics  external influences. *Directional properties: wood is an orthhotropic and anisthotropic material. *Moisture content of wood is… *Thermal expansion of wood is positive in all directions. *Good electrical insulator. *Decay resistance. *Chemical resistance. Mechanical properties: Characteristics  external applied forces. *Elastic properties: Wood is not ideally elastic but wood is usually assumed to behave as an elastic material for most engineering applications. *Strength Properties: varies depending on species, loading condition, load duration, environmental factors…

10. Advantages and disadvantages *easier to acquire, transport and work. *moderately strong. *not expensive *lightweight *thermal insulator *positive phychological effect *chemical resistance *susceptibility to fire, mold and termites. *swellls easily

11. Canada Pavilion composed of 4000 m2 of Canadian red cedar.

12. Conclusion Increasingly, wood framing is also being used in commercial and industrial buildings. Wood frame buildings are economical to build, heat and cool, and provide maximum comfort to occupants. Wood construction is readily adaptable to traditional, contemporary and the most futuristic building styles. Its architectural possibilities are limitless.

13. http://www.fpl.fs.fed.us/documnts/pdf1994/winan94a.pdf http://www.cwc.ca/DesignWithWood/Durability/Wood%20Heritage/Wood %20Advantages?Language=EN http://www.expo2010canada.gc.ca/canada_participation/pavillon- pavilion-eng.cfm http://sawdustmaking.com/Wood/wood.html http://www.plataformaarquitectura.cl/2008/10/03/jose-cruz-ovalle-premio- spirit-of-nature-wood-architecture-award-2008/ http://lie.asignaturas.usb.ve/file.php/93/Wood.pdf References