Wood Innovation Research Lab
The Masters of Engineering in Integrated Wood Design program at the University of Northern British Columbia (UNBC) equips design and construction professionals with the knowledge needed to apply wood use, building science, and sustainable- design principles to future projects. The program is hosted in Prince George, British Columbia, at the Wood Innovation Design Center (WIDC), an eight-story glulam post-and-beam mixed-use building with a cross-laminated timber core that was at the cutting edge of industry when it was first constructed.
As the program grew, so did the need for increased capabilities within the laboratory. First conceived of in spring 2016, UNBC’s new Wood Innovation Research Lab (WIRL) opened its doors in April 2018. The lab building is constructed with engineered-wood products and received Passive House certification in July 2018.
The WIRL is a 10-meter (33-foot) -tall single-story mixed-use building with a large two-bay lab space as well as a separate classroom and office spaces. The superstructure is composed of mass timber glulam columns and beams on a 6-m (20-foot) grid, and the walls are framed with wood trusses in order to achieve a high thermal performance.
The lab and classroom space is being used by UNBC faculty and students for research and testing related to wood construction and Passive House. The lab is equipped with a concrete strong wall and floor complete with anchors and hold- downs for three-dimensional testing of wooden structures. An overhead crane runs the length of one of the two bays, which allows for the safe maneuvering of large test structures or wood specimens. The shop also includes three universal testing machines, a computer numerical controlled (CNC) cutting machine, and a 34-m2 (366-ft2) wood-conditioning room that is equipped with ventilation and humidification in order to create an ideal environment for normalizing wood specimens to a consistent moisture content.
Meeting the Passive House standard was particularly challenging for this project for three reasons. First, Prince George has a harsh climate that swings from 30°C to –30°C during the year and has 234 heating or cooling days per year. Second, because of the need for a very tall lab space, the building envelope area is rather large compared to the small thermally treated floor area—the denominator in all Passive House energy consumption calculations. Third, the building’s program requirements created some very complex challenges. A large bay door was needed to afford access for semitrucks. The cutting machinery throws off significant dust volumes, which in turn require a large dust extraction system, posing significant airtightness challenges. And the hydraulic pumps for the structural testing equipment generate massive interior heat gains when operating.
The building envelope was framed using dimensional-lumber trusses that were prefabricated into one-side-open wall panels. Due to the thermal performance requirements, the 10-m (33-foot) -tall wall panels were required to be over 500 millimeters (19.7 inches) thick. Framing the panels with upright trusses rather than studs accommodated this thickness in a cost-efficient way and reduced the resulting thermal bridges.