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Wood or Timber roof trusses are widely used in USA, Canada and other countries because of its advantages over other trusses, as it offers great flexibility in plan layout. Be it a residential, industrial, commercial or an institutional building, roof of any kind of structure is the most important component of a building as it protects its occupants from the external elements. It is also the largest and the most expensive structural component of a building so investing some thoughts and knowhow in the design and planning of a roof to create an aesthetically pleasing and sound structure that can safely carry the induced loading, while offering acceptable longevity and an attractive appearance for the lifespan of the building is nothing but logical. There are basically two kind of material that is prevalent around the globe for fabrication of trusses: Steel and Wood. While steel trusses have the advantages of ease of handling and erection, there are also some huge drawbacks like high material and maintenance cost and low thermal resistance. Timber/Wood trusses on the other hand have a longer list of advantages and a shorter list of disadvantages. The high strength-to-weight ratios of timber trusses permit long spans, offer greater flexibility in floor plan layout. They can be molded into almost any shape and size restricted only by manufacturing capabilities and handling considerations. Today, most the house-roofs in USA, Canada and Australia are framed with timber trusses and increasingly, timber trusses are being used in residential and commercial applications. They are gaining acceptance around the world and are being used widely in Europe and Japan.

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