Seattle URM Project maureen traxlerseattle gov www seattle

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

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

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

Schedule n Ordinance to present to elected officials in summer of 2009

Schedule n Ordinance to present to elected officials in summer of 2009

Public Involvement n 2 advisory committees: q Technical committee n n n q What’s

Public Involvement n 2 advisory committees: q Technical committee n n n q What’s an “unreinforced masonry building”? What’s the appropriate standard for retrofits? Has met once Policy committee n n 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

URM Seismic Hazards Study December 2007 n n n Prepared for Seattle by Reid

URM Seismic Hazards Study December 2007 n n n Prepared for Seattle by Reid Middleton Compiled data about URMs from earlier surveys + additional surveys Estimated cost of damage to URMs in future earthquakes

URM Inventory n n n Identifying all URMs in Seattle Beginning with information in

URM Inventory n n n 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

What do we know about URMs in Seattle? n n Estimate 850– 1000 URMs

What do we know about URMs in Seattle? n n 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%)

URMs in the Nisqually Earthquake n n After Nisqually earthquake, 20 of 31 redtagged

URMs in the Nisqually Earthquake n n After Nisqually earthquake, 20 of 31 redtagged 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 $)

Cost of Upgrades n n n Cost of structural-only upgrades to URMS estimated to

Cost of Upgrades n n n 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 q Bldg is damaged, but gravity system & exits are intact and falling hazards minimized

More Information n seattle. gov/dpd q q n Seismic Hazards report Links to other

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