Building Construction Concerns for Firefighters: Cross Laminated Timber

by Gregory Havel Cross laminated timber (CLT), a form of manufactured lumber, was developed in Switzerland and Germany in the 1990s. Its use is common in Europe, becoming common in Canada, and may soon be common in the United States. It has been used extensively in commercial and residential buildings of five to eight stories, and its designers proposed that high-rise buildings can be constructed of it in place of steel and concrete. The size and strength of the panels make it useful in prefabricated structures, since it provides nearly the strength of concrete with less weight. CLT panels (photo 1) are made of several layers of dimensional lumber (2 x 4, 2x6) stacked with adjacent layers...

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