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Seattle URM Project

Seattle URM Project. maureen.traxler@seattle.gov www.seattle.gov/dpd September 24, 2008. Purpose. Reduce damage to unreinforced masonry buildings in earthquake by requiring structural retrofit . Schedule. Ordinance to present to elected officials in summer of 2009. Public Involvement.

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Seattle URM Project

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  1. Seattle URM Project maureen.traxler@seattle.gov www.seattle.gov/dpd September 24, 2008

  2. Purpose Reduce damage to unreinforced masonry buildings in earthquake by requiring structural retrofit

  3. Schedule • Ordinance to present to elected officials in summer of 2009

  4. Public Involvement • 2 advisory committees: • Technical committee • What’s an “unreinforced masonry building”? • What’s the appropriate standard for retrofits? • Has met once • Policy committee • What types of buildings should be required to be retrofitted? • How long should they have to comply? • What incentives and financial assistance would be most beneficial? What is available? • First meeting will be held in October

  5. URM Seismic Hazards StudyDecember 2007 • Prepared for Seattle by Reid Middleton • Compiled data about URMs from earlier surveys + additional surveys • Estimated cost of damage to URMs in future earthquakes

  6. URM Inventory • Identifying all URMs in Seattle • Beginning with information in URM Seismic Hazard Study; intend to survey every part of Seattle • Will notify owners about URM project

  7. What do we know about URMs in Seattle? • Estimate 850–1000 URMs in Seattle • Many located in areas expected to be subject to high seismic forces • Not just located in Pioneer Square, ID, Columbia City—also Georgetown, Roosevelt, U District, Greenwood, many other neighborhoods • Low rates of upgrade and demolition compared to other western cities (<10%)

  8. URMs in the Nisqually Earthquake • After Nisqually earthquake, 20 of 31 red-tagged buildings were URMs • Of $200+ million in damage estimated from the 2001 Nisqually earthquake, URM buildings estimated to suffer over $8 million in property damage repairs (in 2001 $)

  9. Cost of Upgrades • Cost of structural-only upgrades to URMS estimated to be $358–$431 million • Architectural and nonstructural costs other than hx preservation and accessibility estimated to be 2.5 times higher • Estimates based on FEMA 157 & 276, with costs to upgrade to FEMA life safety performance level • Bldg is damaged, but gravity system & exits are intact and falling hazards minimized

  10. More Information • seattle.gov/dpd • Seismic Hazards report • Links to other cities’ regulations • Information about public involvement • Sign up for mailing list • Contact me • maureen.traxler@seattle.gov • 206-233-3892

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