North Royalton's Seismic Design Category, explained

North Royalton carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, North Royalton ranks above 46% of the 4,875 cities in this dataset for seismic hazard - the 46th percentile.

Where North Royalton sits in Ohio

The raw figures: peak ground acceleration 0.071g, short-period spectral response 0.134g, 1-second spectral response 0.05g. Among 254 Ohio cities in this dataset, North Royalton ranks 97 for seismic hazard, the 62th percentile within the state. About 30,894 people live in North Royalton, Ohio.

Retrofit economics for North Royalton

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.

Insuring against this, not just retrofitting

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 North Royalton address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced North Royalton'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.