EBB Retrofit: Brace Bolt Raised-Foundation Homes | CRMP In an Earthquake Brace + Bolt (EBB) seismic retrofit, the foundation is "bolted" to the frame of the house, and when there are walls called "cripple walls" in the crawl space under the house, they are "braced" with plywood This helps prevent the house from sliding or toppling off of its foundation during an earthquake
EBB Definition Meaning | Dictionary. com a flowing backward or away; decline or decay the ebb of a once great nation a point of decline His fortunes were at a low ebb to flow back or away, as the water of a tide (flow ) to decline or decay; fade away His life is gradually ebbing