Light framing could not be used in the 12-storeys being proposed as it does not bring mass timber’s combined strength and fire resistance ratings. The Virtuoso hybrid building at the University of British Columbia has led the way, showing speed of construction to developers. “As the code becomes more mature, I think we will embrace greater heights,” said Green.Ĭanada’s move into 12-storey mass timber construction is an added dimension of wood multi-storey construction beside existing methods such as light timber frame (six storeys) and more recently the six-storey hybrid structures combining mass timber with light frame. “They (code makers) have taken baby-steps into the market,” said Green, calling the 12-storey figure “arbitrary”. “Six-storey construction is more about the use of light-wood framing and has nothing to do with mass timber construction (in the 2020 NBCC),” said Vancouver architect Michael Green, a longtime advocate of tall wood buildings reaching as high as 30 storeys using mass timber. Instead, it opens a new door on Canadian wood construction. The new 2020 National Building Code of Canada (NBCC) will include the use of mass timber construction for 12-storey structures (42 metres in height), but the move is more than a simple doubling of the six-storey wood structures now within the Canadian NBCC and integrated into provincial and local building codes.
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