Jacksonville Beach's Seismic Design Category, explained

Jacksonville Beach 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. Rank it against the rest of the country and Jacksonville Beach sits at the 30th percentile for seismic hazard among 4,875 US cities.

Jacksonville Beach by the numbers

The raw figures: peak ground acceleration 0.05g, short-period spectral response 0.104g, 1-second spectral response 0.053g. Among 228 Florida cities in this dataset, Jacksonville Beach ranks 5 for seismic hazard, the 98th percentile within the state. About 23,630 people live in Jacksonville Beach, Florida.

Retrofit economics for Jacksonville Beach

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

More on how this number was built

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