Heartwood Workforce Housing

Mass Timber Workforce Housing

The eight-story mass-timber project is the first IBC Type IV-C workforce housing project permitted in the United States. The project exposes the CLT ceilings and glulam column and beams within the units, hallways and lobby, along with two Mass Plywood Panel (MPP) exit stairs. 126 studio and 1-bedroom units are provided, and the building includes an outdoor amenity courtyard, bike parking, retail, laundry. Led by architect atelierjones, the project was completed in Dec. 2023 for owner, Community Roots Housing. The project was supported by a 2019 USFS grant.

Kalesnikoff supplied Glulam (GLT) and 5-ply cross-laminated timber (CLT) panels cut to size. Machining included pre-cut GLT beams and columns, custom panel sizing and daps cut for spline connections. We were part of a fully integrated team using extensive Building Information Modeling (BIM) for prefabrication of all Mass Timber elements. During the design, fabrication, and construction process the KMT team undertook to blend traditional joinery techniques with cutting-edge mass timber fabrication advancements.

This video explores the creation of 2-hour rated glulam beam-to-column connections on Heartwoodthe 8-story Type IV-C building in Seattle, WA. Hear from project team members about the design, fabrication, and construction process they undertook to blend traditional joinery techniques with cutting-edge mass timber fabrication advancements. Featuring Adam Jongeward, PE SE; DCI Engineers; Taylor Cabot and Lauren Magasko, Timberlab.