Swinerton Builders employed CrossLam CLT not only as a structural solution, but also as a path toward simplifying other building systems, such as the foundation and envelope. Photo: E. Van Rossen for Swinerton
In total, more than 626 CrossLam panels and 988 glulam columns and beams were delivered in 64 truckloads. Photo: E. Van Rossen for Swinerton
CLT horizontal diaphragms, as well as a fully fabricated mass timber package for the First Tech project. With the First Tech project, Swinerton Builders identified and capi- talized on the ripple effects of optimizing the building’s structure. Swinerton employed CrossLam CLT not only as a structural solution, but also as a path toward simplifying other building systems, such as the foundation and envelope. Through pre-planning and coordination, Structurlam implemented a shift toward a more “systems-oriented” construction process. Swinerton managed and coordinated project partners through a fully integrated, virtual design and construction BIM model, which included the timber structure, the steel lateral systems, and the MEP services. At the Structurlam facility, glulam and CrossLam CLT were prefabri- cated for First Tech by CNC machines based on a fabrication-level 3D model. Like Lincoln Logs or Legos, the materials are pre-constructed to an exact fit, giving way for smarter utilization during the construc- tion period. The installation Upon completion of the design, 3D modeling, and shop drawings, the first glulam columns were delivered and installed on July 27. In total, 626+ CrossLam panels and 988+ glulam columns and beams were
delivered in 64 truckloads. On Nov. 16, the final CrossLam panel was installed, completing the timber and steel frame of a 156,000-square- foot structure in 15 weeks. How did we manage to construct such a large structure in just 15 weeks? Through self-performing the construc- tion process and using optimizable materials. CrossLam CLT is manufactured to span in two directions, with strength in both major and minor axis directions. By optimizing the frame to be as efficient and light as possible, this allows us to cut down on heavier transport and installation time and costs. Detailed preconstruction planning also helped to ensure that the installation of CrossLam CLT was easy and efficient, simplifying the foundation system and making ground improvements in the foundation unnecessary. A milestone project, First Tech Federal Credit Union is a shining ex- ample of the possibilities of building with mass timber and the associ- ated benefits. In a time when eco-friendly buildings are not a luxury but a necessity, mass timber structures have drawn the world’s attention for their strength, light environmental footprint, and cutting-edge prefab- rication technology. ERICA SPIRITOS , is a mass timber specialist with Structurlam (www.structurlam.com), and WILLIAM P. SILVA is preconstruction manager with Swinerton (www.swinerton.com).
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