Does Frankenmuth, MI need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Frankenmuth is Category A. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Nationally, Frankenmuth ranks above 12% of the 4,875 cities in this dataset for seismic hazard - the 12th percentile.

How Frankenmuth compares

The raw figures: peak ground acceleration 0.034g, short-period spectral response 0.071g, 1-second spectral response 0.04g. Among 153 Michigan cities in this dataset, Frankenmuth ranks 132 for seismic hazard, the 14th percentile within the state. About 5,185 people live in Frankenmuth, Michigan.

Bracing and bolting: the actual cost

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

What this means for insurance

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 Frankenmuth address.

More on how this number was built

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