Wright City's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Wright City 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, Wright City ranks above 73% of the 4,875 cities in this dataset for seismic hazard - the 73th percentile.

Where Wright City sits in Missouri

The raw figures: peak ground acceleration 0.132g, short-period spectral response 0.262g, 1-second spectral response 0.124g. Among 135 Missouri cities in this dataset, Wright City ranks 68 for seismic hazard, the 50th percentile within the state. About 5,723 people live in Wright City, Missouri.

What a retrofit costs in Wright City

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 Wright City 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 Wright City address.

More on how this number was built

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