Bessemer, AL: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Bessemer 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. That puts Bessemer in the 77th percentile nationally for seismic hazard - higher than 77% of the 4,875 US cities USGS was checked against here.

How Bessemer compares

The raw figures: peak ground acceleration 0.185g, short-period spectral response 0.31g, 1-second spectral response 0.102g. Among 107 Alabama cities in this dataset, Bessemer ranks 9 for seismic hazard, the 92th percentile within the state. About 25,079 people live in Bessemer, Alabama.

Retrofit economics for Bessemer

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

Earthquake insurance for a Bessemer 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 Bessemer address.

More on how this number was built

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