This site was developed with support from the Federal Emergency Management Agency

ABAG Soft Stories Page


ABAG has compiled tons of useful information and links about soft story buildings on their website.

Some of the most susceptible structures to shaking damage are soft-story apartments and condominiums. A soft-story residential building is one that has open parking or commercial space on the first floor and housing on higher floors built prior to recent codes. In an earthquake, ground shaking causes such structures to sway and sometimes collapse. A soft-story collapse can have particularly disastrous consequences considering that they crush cars and kill people occupying the open areas. ABAG modeling has shown that, in both a large earthquake on the Hayward or San Andreas faults, two-thirds of the uninhabitable housing units will likely be in soft-story residential buildings.

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