the Siemens velodrome arena in Copenhagen collapsed when a joint between glulam trusses failed at the point of its dowel fastenings. In February 2003 the roof of a newly built exhibition hall in Jyväskylä, Finland, collapsed. It was found that during construction the specified number of dowels at joints between glulam timbers were missing or had been wrongly placed. There was a collapse of the Perkolo bridge, at Sjoa, Norway, in 2016 caused by a design miscalculation of stresses at joints. Following this incident thirteen road bridges of glulam construction were checked, with only minor faults found. On 15 August 2022 Tretten Bridge in Gudbrandsdalen, Norway, collapsed as two vehicles were crossing. It was made with glulam and steel construction and had been erected in 2012, with a design life of "at least 100 years". The cause of the failure was not immediately apparent, although during the 2016 inspection , one joint was found to have dowels that were too short. See also Engineered Wood Cross laminated timber Fiberboard Hardboard I joist Laminated veneer lumber Masonite Medium-density fiberboard Oriented strand board Parallam Particle board Plastic composite (disambiguation) Plywood Pressed wood Timber framing Plyscraper Tretten Bridge collapse (2022) References External links Glulam Beam Repair/Reinforcement – An article (Printed in STRUCTURE magazine, Sep. 2006) by Gary W. Gray P.E. and Paul C. Gilham P.E. Timber Engineering Europe Glulam Canadian Wood Council Glulam Composite materials Engineered wood Timber framing