Charles Albert Ginnever, also known as Chuck Ginnever, was an American sculptor, known primarily for large-scale abstract steel sculptures that defy simple understanding, as the works seem to constantly change form as one moves around them in time and space.

Kenneth Duane Snelson was an American contemporary sculptor and photographer. His sculptural works, exemplified by Needle Tower, are composed of flexible and rigid components arranged according to the idea of 'tensegrity'. Snelson preferred the descriptive term floating compression.