The project: Seismically strengthen a 1950s-era hollow concrete unit masonry gymnasium building at Dufur K-12 School, classified as Unreinforced Masonry (URM).

The goal: Improve the gym’s structural integrity and safety to meet current seismic standards while minimizing disruptions to on-going school activities.

Design approach: The project included the installation of multiple new concrete shear walls throughout the structure to reinforce the extensive URM wall system. Shotcrete application methods were used to efficiently place the new shear walls. Additionally, the original asbestos cement corrugated roofing panels were replaced with a modern, durable standing seam metal roofing system.

WRK Engineers, now IMEG, collaborated closely with the contractor and school district to overcome several logistical and technical challenges. A significant portion of the facility remained in use for summer school programs during construction, requiring the implementation of rigorous temporary protection measures to ensure the safety of students and staff. Detailed planning during the design phase, combined with careful coordination throughout the project, helped streamline execution and reduce potential risks.

Project outcome: Through proactive collaboration and thoughtful design, the seismic rehabilitation was completed without disruptions to school operations. The project was delivered on time and within budget, providing Dufur K-12 School with a safer, structurally sound gymnasium while preserving the functionality of the surrounding educational environment.