Stopping device. 4.1. The device consists of two identical absorbers mounted in parallel.
Stopping device. 4.1. The device consists of two identical absorbers mounted in parallel, except in the case of restraint systems when four absorbers shall be used for a nominal mass of 800 kg. If necessary, an additional absorber shall be used for each 200 kg increase of nominal mass. Each absorber comprises: an outer casing formed from a steel tube; a polyurethane energy-absorber tube; a polished-steel olive-shaped knob penetrating into the absorber; and a shaft and an impact plate.