soft-story
adj.β Β«City officials have decided to speed an analysis of what to do about so-called soft-story buildings because the wood-frame structures are ubiquitous in San Francisco – possibly numbering in the tens of thousands – and probably represent a greater risk simply because of their numbers.Β» ββS.F.βs concrete buildings also a quake danger” by Robert Selna San Francisco Chronicle (California) July 27, 2008. (source: Double-Tongued Dictionary)