Wood Works! with less energy.
Position | Brief Article |
Wood as a structural material consumes less energy than conventional materials
Construction, renovation and operation of a building consumes more of the earth's resources than any other human activity. No other sector has a greater impact on the global environment. Each year it generates millions of tonnes of greenhouse gases, toxic air emissions, water pollutants and solid wastes. It is interesting to note how wood compares with other materials in terms of its ecological impact as a building material.
A case study examining the environmental effects of wood, concrete and steel proved that wood has the lowest energy use. The study applied the ATHENA computer model, using a life-cycle analysis approach. This model is the result of a five-year research program involving a unique alliance between architects, environmentalists, economists, engineers and representatives from the steel, concrete and wood industry. The program is coordinated by Forintek Canada, and supported by the Canadian federal government.
The case study involved a 50,000 sqaure-foot, three-storey office building with a single storey of underground parking," says Catherine Lalonde, professional engineer and director of education for the Canadian Wood Council.
"Professional structural engineers were retained to develop alternative structural designs for the building using primarily wood, steel and concrete elements," she adds.
The ATHENA model analysed raw materials and energy uses as well as emissions to air, water and land for the three design options. On all aspects, the wood design consistently outperformed steel and concrete by having the least impact on the environment.
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