Does Macon-Bibb County, GA need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Macon-Bibb County is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Macon-Bibb County in the 54th percentile nationally for seismic hazard - higher than 54% of the 4,875 US cities USGS was checked against here.

How Macon-Bibb County compares

The raw figures: peak ground acceleration 0.091g, short-period spectral response 0.177g, 1-second spectral response 0.076g. Among 148 Georgia cities in this dataset, Macon-Bibb County ranks 96 for seismic hazard, the 35th percentile within the state. About 157,056 people live in Macon-Bibb County, Georgia.

Retrofit economics for Macon-Bibb County

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 Macon-Bibb County 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 Macon-Bibb County address.

More on how this number was built

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