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In Portland, Oregon, even the buildings are bespoke and locally-sourced. At least, that’s the case with Lever Architecture’s Albina Yard project, where the developer—Portland-based Reworks—tasked the architects with creating a marquee structure that could be used as a testing site and showroom for emerging mass timber systems built from locally-sourced lumber.

(courtesy LEVER Architecture)

  • Facade Manufacturer
    Sierra Pacific
  • Architects
    LEVER Architecture
  • Facade Installer
    REWORKS (contractor); Dallas Glass (windows)
  • Facade Consultants
    KPFF Consulting Engineers (facade engineering)
  • Location
    Portland, OR
  • Date of Completion
    2016
  • System
    Glulam columns and beams with CLT floor/ceiling panels
  • Products
    Sierra Pacific Architectural Wall System; Douglas Fir mullions with a Port Orford Cedar cap.

The 16,000-square-foot speculative office building is a love letter to mass timber construction that proudly utilizes prefabricated elements as finishing materials, leaving raw Douglas Fir cross-laminated timber (CLT) panels and glulam beams rough and unadorned. Albina Yard is the first building in the U.S. to use domestically produced CLT panels as the primary structural building element.

The speculative nature of the four-story office building forced the designers to be “very, very deliberate about architectural moves,” according to Thomas Robinson, founding principal at Lever Architecture. The mindset resulted in a rather straightforward building: A plywood shear wall–wrapped elevator core anchors the rectangular office block along one of its long sides, leaving open spans elsewhere. Besides the elevator, the core contains bathrooms, egress stairs, and an accent stair made entirely of CLT panels. The building’s U-shaped open plan provides large-span offices topped by glulam beams with columns spaced farther apart than would be allowed under less rigid structural systems. Both short ends of the building are studded with windows—The principal facade contains ground floor retail that hugs the street while the back face overlooks a modest courtyard containing a small shipping container that houses a separate office.

Custom-fabricated, powder-coated steel connections hold the wood assemblies together, their engineered bolts embedded deep within the mass of each glulam beam. “We wanted to find a way to embed steel in the wood to protect it from fire,” Robinson explained in reference to the buried bolts. He added, “the powder coat finish prevents the connections from rusting and staining the wood, as well.” Like the structural members, the connections were digitally-fabricated to order for the project and designed to “drift” in either direction by as much as 2% in the event of an earthquake, providing just enough flexibility for the building to sway but not shatter.

(courtesy LEVER Architecture)

The crisp structural connections and exposed fire suppression and HVAC systems lend the structure the type of elemental clarity usually reserved for utilitarian warehouse spaces, on-brand for creative office–seeking clientele. The building’s main facade is clad in a custom window assembly made up of large floor-to-ceiling spans of plate glass interrupted by narrower expanses containing operable windows. “We were excited to express wood on the exterior of the building,” Robinson said, highlighting the rot-resistant Port Orford Cedar wood mullions and window frames along the gradually cantilevering facade. The window wall is an indication, Robinson said, of the building’s innovative structural system. The face of the building steps out little by little as it climbs, with the second and third floors together projecting four feet out and the fourth floor above cantilevering just a few more feet over the street. The depth of these cantilevers is directly related to the spanning capabilities of the three-ply CLT panels used to structure the building.

Ultimately, the project—now fully leased—seems to pull off its intended showroom purpose, showcasing glulam beams that were machined in Portland and CLT panels manufactured in southern Oregon, with everything made from Oregon-harvested lumber.

(courtesy LEVER Architecture)

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