EBB was created to provide incentives to California homeowners to seismically retrofit wood-frame residential structures. An engineered solution is required for qualifying houses with cripple walls that exceed 4 feet in height or:
- Have a lateral-force-resisting system using poles or columns embedded in the ground;
- Exceed three stories in height or is a three-story house with cripple wall studs exceeding 14 inches in height;
- Are constructed in whole or in part on concrete slab(s) on grade; or
- Are classified by the local building department as a house required to be retrofit with plans prepared by a design professional.
California-licensed civil and structural engineers who do residential work are encouraged to join the Directory for free.