Peter P. Petkoff, a structural engineer who helped realize the visions of famed architects Eero Saarinen and Minoru Yamasaki, died Jan. 9 at age 98 of vascular complications.
Petkoff had a decades-long career at the Detroit-based architectural engineering firm Smith, Hinchman & Grylls (now SmithGroupJJR), retiring as a senior vice president in 1984. He worked on two major postwar projects: Saarinen's General Motors Technical Center in Warren, Mich. and Yamasaki's Michigan Consolidated Gas Co. high-rise, now known as One Woodward Avenue.