Carl Junction's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Carl Junction is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Carl Junction ranks above 34% of the 4,875 cities in this dataset for seismic hazard - the 34th percentile.

Carl Junction by the numbers

The raw figures: peak ground acceleration 0.057g, short-period spectral response 0.121g, 1-second spectral response 0.078g. Among 135 Missouri cities in this dataset, Carl Junction ranks 102 for seismic hazard, the 25th percentile within the state. About 8,435 people live in Carl Junction, Missouri.

What a retrofit costs in Carl Junction

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Missouri. 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 Carl Junction address.

More on how this number was built

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