Officials also find multiple cracks and sagging floors in building that is being converted into apartments A high-rise building in Manhattan was deemed unstable on Tuesday after authorities determined that support columns buckled, spurring evacuation of nearby buildings, according to officials and reports. Officials said they also found “structural issues” on the 21st floor of the former Pfizer pharmaceutical building, which is being converted into residential apartments. “Two structural columns buckled, and there were multiple cracks and sagging floors,” the fire department said on X.