Does Kings Mountain, NC need an earthquake retrofit?

Kings Mountain carries Seismic Design Category C under USGS's ASCE 7-16 model. 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 Kings Mountain sits at the 71th percentile for seismic hazard among 4,875 US cities.

Kings Mountain by the numbers

The raw figures: peak ground acceleration 0.112g, short-period spectral response 0.216g, 1-second spectral response 0.084g. Among 147 North Carolina cities in this dataset, Kings Mountain ranks 18 for seismic hazard, the 88th percentile within the state. About 11,797 people live in Kings Mountain, 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 Kings Mountain 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 Kings Mountain address.

More on how this number was built

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