Vancouver-based architect Michael Green was unequivocal at a conference at which I heard him speak a while ago: “We grow trees in British Columbia that are 35 storeys tall, so why do our building codes restrict timber buildings to only five storeys?”
True, regulations in that part of Canada have changed relatively recently to permit an additional storey, but the point still stands. This can hardly be said to keep pace with the new manufacturing technologies and developments in engineered wood products that are causing architects and engineers to think very differently about the opportunities wood offers in the structure and construction of tall buildings.
Green himself produced a book in 2012 called Tall Wood, which explored in detail the design of 20-storey commercial buildings using engineered timber products throughout. Since then he has completed the Wood Innovation and Design Centre at the University of North British Columbia which, at 29.25 metres (effectively eight storeys), is currently lauded as the tallest modern timber building in North America.