
©ThinkWood
A mass-timber structure, acoustic dowel-laminated timber (ADLT) floor decks, and a shingled exterior define Deschutes County’s new 9,290 m2 (100,000 sf) Central Library at Stevens Ranch, Ore. Designed by The Miller Hull Partnership and STEELE Associates Architects, the three-story building combines flexible library spaces, children’s learning areas, coworking facilities, and maker spaces with energy-efficient systems and on-site solar power. The building’s structural layout uses long spans to create open, adaptable interiors with minimal columns. The design team selected Type III-A construction, which permits the use of wood elements with one-hour fire protection. ADLT serves as the floor deck, providing structural support, an exposed finish, and sound absorption. A raised access floor accommodates mechanical systems, electrical conduits, and fire sprinklers, keeping the ceiling and timber columns and beams visually prominent. Concrete core walls provide lateral stability without requiring steel diagonal braced frames.