Survey Safety
Design Consideration
Yield Criteria for Ductile Materials under Plane Stress
Fatigue
Hazard Rate
Personal Protective Equipment
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Updated: Apr 5, 2026

Modified Drop Tower Impact Tests for American Football Helmets
Published on: February 19, 2017
Brian S Hammer1, Stephanie G Pratt2, Peggy Ross3
1Risk management consultant, fleet, with Nationwide Agribusiness Insurance in Des Moines, IA. He is a professional member of ASSE's Quad Cities Chapter and Administrator of ASSE's Transportation Practice Specialty. Hammer is also a member of the ANSI/ASSE Z15 Accredited Standards Committee (ASC).
Motor vehicle crashes are the leading cause of U.S. worker fatalities. These incidents, including roadway and pedestrian incidents, account for a significant portion of all work-related deaths.
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