Fred Sandback's Untitled (Vertical Construction with Two Parts), 1981Fred Sandback's Title unknownFred Sandback's Untitled (Red Corner Piece), 1967Fred Sandback's Untitled, c. 1978Fred Sandback's Broadway Boogie Woogie (Sculptural Study, Twenty-Eight Part Vertical Construction), 1991/2006Fred Sandback's Untitled (Sculptural Study, Six-Part Construction), c. 1977/2008