Columbus's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Columbus is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Columbus ranks above 33% of the 4,875 cities in this dataset for seismic hazard - the 33th percentile.

Where Columbus sits in Nebraska

The raw figures: peak ground acceleration 0.055g, short-period spectral response 0.108g, 1-second spectral response 0.043g. Among 32 Nebraska cities in this dataset, Columbus ranks 5 for seismic hazard, the 87th percentile within the state. About 25,126 people live in Columbus, Nebraska.

What a retrofit costs in Columbus

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Nebraska. 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 Columbus address.

More on how this number was built

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