Mass Timber for Simpler Low-Rise Residential | Mass Timber Podcast

In this episode, hosts Paul Becker and Kristina Rogers talk with Chris Williams about how hybrid mass timber systems are emerging as a practical solution for low-rise residential construction, particularly in markets already reliant on light-frame wood buildings. Rather than fully replacing traditional systems, mass timber is introduced strategically in elements such as floor slabs and shafts. This approach creates a flexible entry point for developers looking to adopt mass timber without fully committing to all-timber structures. Low-rise buildings can also leverage IBC Type 3 and Type 5 requirements, which are simpler and less costly than Type 4 construction.* Two projects, the Mayflower Hill Residence Hall at Colby College and Goldfinch Lofts, an affordable housing development in Des Moines, Iowa, illustrate these approaches

Chris highlights how prefabrication of mass-timber components off-site is enabling faster on-site assembly with smaller crews. But this shift requires strong up-front coordination, particularly for MEP systems. Early collaboration and detailed planning become critical to fully realize the benefits of speed and efficiency. The conversation also explores the benefits of having the structural engineer take on the role of special inspector during construction.

The episode examines how mass timber can address broader industry challenges, including labor shortages and the need to accelerate housing delivery. As adoption grows, hybrid systems offer a scalable model for both affordable and market-rate housing.

* In the International Building Code (IBC), mass timber (or “heavy timber”) is categorized as Type 4 construction. Type 3 (“ordinary”) combines noncombustible exterior walls with combustible interior elements. Type 5 (“wood-frame”) uses conventional light-wood studs and joists with plywood sheathing.