Safety distances for reaching over

All guards must be designed and positioned in such a way that no change can occur in the safety distances. The specified values for safety distance assume that no aids such as boxes, chairs or ladders are used to reach the hazard zone.
1. a  Height of hazard zone
2. b  Height of protective structure
3. c  Horizontal distance to hazard zone
In order to determine the required safety distances a risk assessment must be carried out in accordance with DIN EN ISO 12100 and DIN EN 1050.
If the measured values for a, b or c are between two reference values, those that produce the greatest safety must be chosen in all cases.