Winder's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Winder is Category C. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Rank it against the rest of the country and Winder sits at the 69th percentile for seismic hazard among 4,875 US cities.

Winder by the numbers

The raw figures: peak ground acceleration 0.097g, short-period spectral response 0.193g, 1-second spectral response 0.085g. Among 148 Georgia cities in this dataset, Winder ranks 72 for seismic hazard, the 52th percentile within the state. About 20,628 people live in Winder, Georgia.

What a retrofit costs in Winder

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.

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 Winder address.

More on how this number was built

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