Title: +038=627.001-##001T_03-Fasadevasksystem NorAcon - International Code of Practice (ICOP).pdf
2.7.2.5 Textile ropes constructed with a load-bearing core and an outer protective sheath are recommended, e.g. kernmantel construction. Ropes should be resistant to wear from the anchor line devices and should resist the ingress of dirt and grit. It is likely that the majority of anchor line devices used in rope access are compatible only with rope of kernmantel construction. However, ropes with other types of construction may be used if it is thoroughly verified that these give a similar level of safety and there are compatible anchor line devices.2.7.2.6 Efficiency in descending, ascending and, to some extent, working in one place for any length of time, depends on the elongation characteristics of the working line. Therefore, in most cases, the working line (and normally also the safety line) should be a low-stretch kernmantel rope.