Does Bennettsville, SC need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Bennettsville 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. That puts Bennettsville in the 72th percentile nationally for seismic hazard - higher than 72% of the 4,875 US cities USGS was checked against here.

Where Bennettsville sits in South Carolina

The raw figures: peak ground acceleration 0.127g, short-period spectral response 0.241g, 1-second spectral response 0.094g. Among 66 South Carolina cities in this dataset, Bennettsville ranks 61 for seismic hazard, the 8th percentile within the state. About 7,595 people live in Bennettsville, South Carolina.

What a retrofit costs in Bennettsville

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

Insuring against this, not just retrofitting

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 Bennettsville address.

More on how this number was built

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