Hackettstown's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Hackettstown is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Hackettstown ranks above 60% of the 4,875 cities in this dataset for seismic hazard - the 60th percentile.

Hackettstown by the numbers

The raw figures: peak ground acceleration 0.13g, short-period spectral response 0.223g, 1-second spectral response 0.053g. Among 194 New Jersey cities in this dataset, Hackettstown ranks 148 for seismic hazard, the 24th percentile within the state. About 10,182 people live in Hackettstown, New Jersey.

Retrofit economics for Hackettstown

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

Earthquake insurance for a Hackettstown 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 Hackettstown address.

More on how this number was built

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