盖挖加层
top-down additional floor
钢结构跃层加层
adding extra-floor spanning existing building with steel structure
钢结构直接加层
directly steel adding storey
钢筋混凝土加层
reinforced concrete coating
加层改造
adding stories’ reconstruction
Story-adding
加层隔震结构
adding-story isolation structure
isolation add-layer
加层减震结构
structure with TMD and the add-layer
加层扩建
storey-plus extension project
轻钢加层
light-steel adding story
light-weight steel adding storey
light-steel adding
跃层加层
adding extra-floors spanning existing building