Does Brunswick, OH need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Brunswick is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Brunswick sits at the 44th percentile for seismic hazard among 4,875 US cities.

Brunswick by the numbers

The raw figures: peak ground acceleration 0.068g, short-period spectral response 0.129g, 1-second spectral response 0.05g. Among 254 Ohio cities in this dataset, Brunswick ranks 152 for seismic hazard, the 40th percentile within the state. About 35,166 people live in Brunswick, Ohio.

What a retrofit costs in Brunswick

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Ohio. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

What this means for insurance

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Brunswick address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Brunswick's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.