Mass Timber 101: Efficient and Sustainable Construction

This article, by Adarsh Krishna and JJ Sneed, P.E., S.E. of Kimley-Horn, discusses how Mass timber, including engineered wood materials and construction methods, is gaining popularity in the United States due to its cost-efficiency, sustainability, and aesthetic advantages. Mass timber encompasses various engineered wood products such as cross-laminated timber (CLT), nail-laminated timber (NLT), and laminated strand lumber (LSL), among others. These materials are constructed into panels, beams, and columns from smaller wood pieces, offering strength comparable to concrete and steel but at a significantly lower weight. Mass timber can be used in large-scale structures, with the 2021 International Building Code allowing for buildings of up to 18 stories made from mass timber due to its strength, quality control, and dimensional stability. While it provides unique aesthetics and biophilic benefits, it's essential to consider fire resistance and safety factors in large-scale applications.

Mass timber offers compelling cost, style, and sustainability advantages in construction, making it a viable alternative to traditional building materials like concrete and steel. Its use is expanding in the construction industry, with an emphasis on large-scale structures, but it's crucial to address fire safety concerns when utilizing mass timber. Nonetheless, mass timber's ability to create appealing, nature-connected spaces makes it an attractive option for developers and building owners.