Mandeville's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Mandeville is Category B. 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 Mandeville sits at the 24th percentile for seismic hazard among 4,875 US cities.

Where Mandeville sits in Louisiana

USGS's underlying values for Mandeville: 0.043g peak ground acceleration, 0.089g at short period, 0.058g at 1 second. Within Louisiana alone, Mandeville ranks 22 of 59 cities by seismic hazard - the 64th percentile in-state. Mandeville has a population of about 12,973.

Retrofit economics for Mandeville

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Louisiana specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Louisiana.

Earthquake insurance for a Mandeville home

A Mandeville homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Mandeville's figures come from

Mandeville's Category B and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category B does and doesn't tell you about Mandeville.