Forest Park's Seismic Design Category, explained

Forest Park carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Forest Park sits at the 38th percentile for seismic hazard among 4,875 US cities.

How Forest Park compares

The raw figures: peak ground acceleration 0.061g, short-period spectral response 0.122g, 1-second spectral response 0.064g. Among 330 Illinois cities in this dataset, Forest Park ranks 226 for seismic hazard, the 32th percentile within the state. About 13,846 people live in Forest Park, Illinois.

Retrofit economics for Forest Park

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

Earthquake insurance for a Forest Park 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 Forest Park address.

More on how this number was built

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