Does Waynesville, MO need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Waynesville 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. Rank it against the rest of the country and Waynesville sits at the 71th percentile for seismic hazard among 4,875 US cities.

How Waynesville compares

The raw figures: peak ground acceleration 0.117g, short-period spectral response 0.242g, 1-second spectral response 0.125g. Among 135 Missouri cities in this dataset, Waynesville ranks 72 for seismic hazard, the 47th percentile within the state. About 5,493 people live in Waynesville, Missouri.

Retrofit economics for Waynesville

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.

Earthquake insurance for a Waynesville 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 Waynesville address.

More on how this number was built

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