Does Senoia, GA need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Senoia 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 Senoia sits at the 48th percentile for seismic hazard among 4,875 US cities.

Senoia by the numbers

The raw figures: peak ground acceleration 0.074g, short-period spectral response 0.153g, 1-second spectral response 0.079g. Among 148 Georgia cities in this dataset, Senoia ranks 125 for seismic hazard, the 16th percentile within the state. About 6,101 people live in Senoia, Georgia.

What a retrofit costs in Senoia

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

Earthquake insurance for a Senoia home

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 Senoia address.

More on how this number was built

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