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Safeguarding Crushing Points by Limitation of Forces

Mewes D., Mauser F.

International Journal of Occupational Safety and Ergonomics

2003

Vol. 9, No. 2

177--191

Limitation of forces can be a simple measure to safeguard crushing points at doors, machines, and vehicles. In this connection different standards define a threshold force value of 150 N. This widely accepted value refers to static forces that arise from impact on a person are frequently ignored, although they are generally higher than the static forces. The article describes an instrument for the measurement of static and dynamic crushing forces. This instrument has a stiffness that approximates the average stiffness of human fingers as one of the most at-risk parts of the human body with regard to crushing injuries. Sensory tests were carried out to define dynamic forces considered admissible at crushing points.