Title: +038=627.001-##001T_03-Fasadevasksystem NorAcon - International Code of Practice (ICOP).pdf
L.2.6.6.2 Unless the manufacturer specifically says otherwise, retractable type fall arresters should only be used in the totally vertical plane and the retractable lanyard should not be allowed to pass over an edge. This is for two reasons: to protect against abrasion or cutting of the retractable lanyard, particularly when under tension, and because many retractable type fall arresters do not work properly if any friction impedes the free running of the retractable lanyard (see L.2.6.6.4.).L.2.6.6.3 Retractable type fall arresters which are allowed by the manufacturer to be used away from the vertical plane and are used in this way require a special awareness by the user of particular potential hazards, e.g. a pendulum fall of a type that could cause injury.