Does Little Rock, AR need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Little Rock is Category D. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. Rank it against the rest of the country and Little Rock sits at the 82th percentile for seismic hazard among 4,875 US cities.

How Little Rock compares

The raw figures: peak ground acceleration 0.2g, short-period spectral response 0.367g, 1-second spectral response 0.145g. Among 68 Arkansas cities in this dataset, Little Rock ranks 28 for seismic hazard, the 60th percentile within the state. About 204,774 people live in Little Rock, Arkansas.

Bracing and bolting: the actual cost

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Arkansas. 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 Little Rock address.

More on how this number was built

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