finn r,

Not certain what type of reach unit you maybe refering to. But most reach unit (carriage pantograph design not mast reach type) are not fitted with seat belts. The operator merely stands in the compartment and hold on to the tiller and hydraulic control handle or lever(s). At one time US manufacturers offered a optional door enclosure over the operators entry opening to keep the operator retained inside but because of issues that the operator could not easily escape when the unit over turned many if not all discountinued this option.

I always was advised that on stand-up units (reach type not counterbalanced) it is best for the operator to step out in cas of turn over as most units reach unti will turn over sideways

It would be interesting to here from someone from Crown, Raymond (pantograph reach) and Nichiyu (mast reach manufactuer) on this matter.