Innovative Detail

How to Design a Custom Timber Structure on a Tight Budget

Through creative detailing and design, Hennebery Eddy Architects crafted a facility for the Cascades Academy that complements its forested site.

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Panels of hemlock ribs accent the walls in the school entrance. The play of light among a line of trees in a black-and-white photo of a nearby canyon inspired the abstract pattern. “We sketched out a lot of concepts for the entry,” Eddy says. “In the end, everyone was most comfortable with a surface treatment that remained in character with the rest of the building.”

Josh Partee

Panels of hemlock ribs accent the walls in the school entrance. The play of light among a line of trees in a black-and-white photo of a nearby canyon inspired the abstract pattern. “We sketched out a lot of concepts for the entry,” Eddy says. “In the end, everyone was most comfortable with a surface treatment that remained in character with the rest of the building.”

Money was tight for the Cascades Academy, in Bend, Ore., which needed a facility to accommodate its growing student population that had been stuck in rented classrooms since the private day school’s founding in 2003. While the forested site overlooking the Deschutes River called for a timber structure, the nonprofit’s budget was more in the realm of fiber-cement cladding or stucco on block.

In 2007, the school’s board of directors hired Portland, Ore.–based Hennebery Eddy Architects to design a master plan for the 21-acre site, but the board pressed the pause button when the economy soured. In 2009, after plans resumed and Hennebery Eddy began design on a 38,500-square-foot facility, talk turned to slashing costs—and expectations. A couple of the school’s board members spoke up, says Hennebery Eddy founding principal and project design leader Tim Eddy, AIA. “They wanted a building that belongs in the region.”

Resolved to avoid the Pacific Northwest’s overused chalet aesthetic, the firm crafted a “more finely detailed piece of contemporary architecture” that reflects the school’s nature-focused mission and met the budget, Eddy says. Wood, glass, and novel steel connection details blur the line between the outdoors and indoors while strategic material and design choices made the project financially feasible.

The designers wanted to blur the lines between the outdoors and indoors. Double-channel steel columns allow light and views of the landscape to slip through the building structure. Knife plate connections—thin steel plates mortised into wooden beams or anchored in concrete—extend 6 inches above and below the tops and bottoms of the columns, giving the structure an open feel.

Josh Partee

The designers wanted to blur the lines between the outdoors and indoors. Double-channel steel columns allow light and views of the landscape to slip through the building structure. Knife plate connections—thin steel plates mortised into wooden beams or anchored in concrete—extend 6 inches above and below the tops and bottoms of the columns, giving the structure an open feel.

Column head detail

Hennebery Eddy Architects

Column head detail

Hennebery Eddy specified structure-as-finish detailing for columns and beams and used standard platform wood framing (nailed studs) behind painted gypsum wallboard or western hemlock 1x boards.

Josh Partee

Hennebery Eddy specified structure-as-finish detailing for columns and beams and used standard platform wood framing (nailed studs) behind painted gypsum wallboard or western hemlock 1x boards.

Column base detail

Hennebery Eddy Architects

Column base detail


About the Author

Logan Ward

Freelance journalist Logan Ward has written about architecture, design, and innovation for The Atlantic, Smithsonian, Garden & Gun, Preservation, Popular Mechanics, and many other magazines. Ward is the author of See You in a Hundred Years, the true account of the year his family traded digital-age technology for the tools of his great-grandparents’ era.

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