Does Salisbury, NC need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Salisbury in Seismic Design 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 Salisbury sits at the 52th percentile for seismic hazard among 4,875 US cities.

How Salisbury compares

The raw figures: peak ground acceleration 0.085g, short-period spectral response 0.171g, 1-second spectral response 0.074g. Among 147 North Carolina cities in this dataset, Salisbury ranks 65 for seismic hazard, the 56th percentile within the state. About 36,579 people live in Salisbury, North Carolina.

Bracing and bolting: the actual cost

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

Earthquake insurance for a Salisbury 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 Salisbury address.

More on how this number was built

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