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15

Twin ropes can be as small as 6.9mm (35g/m), and are only used in pairs; you tie into two ropes, and clip both as though they were a single rope. This provides you with the redundancy of having more than one rope, but without the weight of carrying two single ropes. Twin ropes also allow a full-rope-length rappel which often strongly factors in the choice ...


2

Mr. Wizards answer provides nice pictures supplied by Beal about what type of ropes can be used on ice/snow and rock. Quick recap: On ice/snow you can use every rope type (single, half and twin) with a single strand. If there is rock involved the single rope can still be used with one strand, while twin ropes have to be used as two strands immediately ...



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