The Oregon Resilience Plan – Critical and Essential Buildings – February 2013 82 <br /> <br /> <br />that inadequate or non-existent seismic design is pervasive in every region of Oregon, and that seismic <br />retrofit investment at the school district level has been limited. <br />Schools are typically large, complex buildings with plan irregularities that will be sources of poor seismic <br />performance. Many schools are campuses that are comprised of multiple buildings of varying sizes and <br />construction dates, and often varied construction materials. Primary, K-8, and high schools generally <br />consist of one- or two-story wood-frame or concrete masonry unit (CMU) and concrete buildings with <br />flexible roof diaphragms. One- to three-story lightly-reinforced concrete buildings braced by concrete <br />shear walls, concrete tilt-up buildings, and unreinforced masonry (URM) buildings are also common. <br /> <br />Figure 4.5: The previous Molalla High School building, a three-story unreinforced masonry structure, was damaged from the M5 .6 Scotts Mills, <br />Oregon earthquake in 1993. It happened during spring break, when the school was empty, which prevented serious injuries. The district took the <br />opportunity to forecast future needs and decided not to rebuild at the same location. Molalla High School is now housed on a larger campus <br />with a stronger, more spacious building. Many URM schools and other buildings in Oregon could suffer a similar fate in future earthquakes. <br />Communities can act now to plan how and when to rehabilitate or replace these aging, potentially dangerous facilities. (Source: DOGAMI) <br /> <br /> <br /> <br /> <br />