, many different techniques of creating composite action between the DLT and the concrete topping are used, including:
• Fully threaded screws inclined in the direction of the shear flow
• Milled notches in the DLT panel, continuous perpendicular to the direction of the span
• Use of fluted DLT, with the flutes turned up so the concrete topping flows between the higher laminations
Dowel Laminated Timber takes mass timber construction one step further to create a 100 per cent wood panel which can be CNC machined and incorporate acoustic treatment into an exposed wood soffit. Due to its efficiency, aesthetics, and cost effectiveness, DLT will help lead the push towards wood construction.
DLT also extends the range of mass timber options available in North America, and supports the trend towards prefabrication as the future of building construction.
• Binational Softwood Lumber Council. 2017.
Nail Laminated Timber – U.S. and Canadian Design and Construction Guide v1.0.
• E3 Berlin, www.proholz.at/zuschnitt/33/lueckenfueller-mit-distanz
• Osborne, Linday (FPInnovations). 2015.
“Fire Resistance of Long Span Composite
Wood-Concrete Floor Systems”
Lucas Epp, P.Eng., leads the engineering department at StructureCraft and has also co-authored industry guidelines including the recently published NLT Design and Construction Guide. He can be reached at email@example.com or (604) 313-2526.