In this episode, we talk with Mark Robertson, M.A.Sc., P.Eng., Struct.Eng., S.E., a project manager at WHM Structural Engineers, about the use of cross-laminated timber in construction, their sustainability and environmental benefits, their innovative applications in architectural projects, and the potential for the rise of taller mass timber buildings. ***The video version of this episode can be viewed here.*** Engineering Quotes: Here Are Some of the Questions We Ask Mark: How does the use of mass timber contribute to the goal of reducing carbon footprints, considering the increasing commitment to sustainability in the structural engineering industry? Can you share some insights and challenges you encountered while working on significant projects like the Olympic Oval in Richmond, BC, and the Virtuoso? How did the unique curvy design in the project's architecture contribute to the use of CLT, particularly when compared to conventional light frame construction, and how did this contribute to the overall success of the project? What are some significant differences or common mistakes that first-time engineers should be aware of when working on their initial mass timber projects? Can you discuss the importance of accounting for shrinkage and the proper placement of bolted connections in mass timber projects? What do you predict for the future of mass timber and construction in the next 20-25 years, and what key trends or developments should engineers and contractors anticipate? Are there accessible resources like sample buildings, drawing plans, or 3D models that students can use to improve their understanding of 3D visualization in structural engineering? Here Are Some of the Key Points Discussed About the Benefits of Using Cross-Laminated Timber in Construction: Mass timber products trap carbon, reduce emissions from decaying trees, and offer a sustainable alternative to carbon-intensive materials like concrete and steel. In education, the focus begins with structural principles, gradually integrating sustainable practices to align with the growing environmental consciousness among younger generations. The Richmond Oval project employed panels made from Pine Beetle 2x4 wood, creatively spliced into an arch shape spanning 440 feet, showcasing both unique design and acoustical benefits. This collaborative effort with StructureCraft underwent rigorous research, testing, and redesign, highlighting its innovative construction approach. The Virtuoso project utilized cross-laminated timber panels from StructureLam, demonstrating their efficiency in a six-story residential building where they replaced traditional materials, resulting in accelerated construction without compromising fire protection. Apart from cross-laminated timber, the rise of other mass timber products like fine line and mass plywood channel, along with the development of micro cross-laminated timber for increased design flexibility and curved panel options, has expanded construction possibilities. The evolution of high-strength screw technology has significantly reinforced wood structures, addressing inherent weaknesses and enabling diverse applications in engineering projects. Understanding the material properties of cross-laminated timber is crucial, particularly in avoiding perpendicular-to-grain compression issues in tall structures. Addressing shrinkage concerns by incorporating appropriate detailing that allows for natural movement is equally important to prevent structural complications in mass timber projects. Constructing cost-effective mass timber structures involves using thinner panels within structural limits. Occasionally, a comprehensive understanding of span tables helps make minor adjustments, enabling efficient design without excessive reliance on...