Swinerton and Swinerton Mass Timber were brought on board during the very initial phases of the project. This allowed them to coordinate delegated design with design teams, engineers, and MEPF trades. As a result, Swinerton’s in-house Virtual Design and Construction (VD&C) group performed extensive BIM modeling and coordination during preconstruction. The coordinated efforts during design, planning, and fabrication proved to be highly beneficial for the project team, as it helped to resolve issues and proactively control project delivery. In the end, the team completed the design in approximately three months and released materials for fabrication.
The utilization of modular CLT construction differs greatly from a typical lightwood framed residential Type V building. With residential podium-style buildings, the stick framing walls are built onsite. This is followed by the installation of the joist system and the floors. Penetrations are then made in the field, which can be routed through the joists and/or wall cavities. On this project, however, all of that took place in a virtual environment prior to modular fabrication, detailing, and installation.
In this case, the prefabricated panels included shop-cut penetrations. The prefabricated components were designed to 1/16”, with everything coordinated before it was cut. As components are always precut to exact specifications, there were extremely few field errors. The utilization of CLT assisted in quality control as a result, while also helping to accelerate the field installation schedule.
The components were manufactured with specifically tailored dimensions. This directly benefited the field installation sequence, as the components were immediately ready to be installed upon being delivered onsite. The panels were then lifted by crane, which allowed installers to finish roughly half a floor each day. As the CLT installation also generated very minimal waste onsite, its low environmental impacts will help achieve the project’s LEED Platinum certification.