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

WOODCarla Rincón 09-10710

Jennifer Pacheco 09-10598

Content

1. History2. Types of wood3. Construction methods4. Physical and mechanical properties5. Advantages and disadvantages6. Examples in architecture

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?

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

• 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

Types of wood

1. Softwood LumberCommon varieties are pine, fir, spruce,

hemlock, cedar and redwood. These woods are mostly used in the home

construction industry

2. Hardwood LumberPopular 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

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.

Wood propertiesPhysical 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…

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

Canada Pavilion

composed of 4000 m2 of Canadian red cedar.

ConclusionIncreasingly, 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.

•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