Shelbyville, TN: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Shelbyville 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. Nationally, Shelbyville ranks above 72% of the 4,875 cities in this dataset for seismic hazard - the 72th percentile.

Where Shelbyville sits in Tennessee

The raw figures: peak ground acceleration 0.127g, short-period spectral response 0.255g, 1-second spectral response 0.123g. Among 104 Tennessee cities in this dataset, Shelbyville ranks 98 for seismic hazard, the 6th percentile within the state. About 25,792 people live in Shelbyville, Tennessee.

Retrofit economics for Shelbyville

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

Earthquake insurance for a Shelbyville 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 Shelbyville address.

More on how this number was built

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