Hannskarl Bandel (May 3, 1925 Dessau, Germany – December 29, 1993 Aspen, Colorado, United States), was a German-American structural engineer.
After working in the German steel industry, he came to the United States after World War II with no money and two suitcases full of books, hoping to build suspension bridges.
According to Benjamin Horace Weese, Bandel personally saved the deteriorating Guastavino tile dome at the Cathedral of St. John the Divine by New York City in 1972 by recommending that its supporting granite piers be insulated.
In later years Bandel produced an innovative study for three-dimensional trusses to be assembled without tools in zero gravity, for the NASA Mars Pathfinder project.
In Jonathan Franzen's The Twenty-Seventh City protagonist Martin Probst clearly refers to Bandel as constructor of the Gateway Arch and puts him in the middle of a political conspiracy that finally unravels both, his professional life and his family.