Here's a quick look at EN892 Specs and Standards:
European Standard EN892 Mountaineering Equipment - Dynamic Mountaineering Ropes- Safety requirements and test methods
Terms and Definitions from the Standard:
1: Single Ropes: Dynamic Mountaineering rope, capable of being used singly, as a link in the safety chain, to arrest a person's fall.
2: Twin Ropes: Dynamic mountaineering rope, which is capable, when used in pairs and parallel, to arrest a person's fall.
3: Half Ropes: Dynamic Mountaineering rope, which is capable, when used in pairs, as a link in the safety chain to arrest a person's fall
1. Construction: Kernmantle with core having a greater mass than the sheath
2. Sheath Slippage: Must be less than 40mm over a 200mm sample or no more than 20%.
3. Static Elongation: Tested using an 80kg weight for single and twin ropes and a 55kg weight for half ropes
- Single and Twin Ropes (using both strands): Must be less than 8%.
- Half Ropes (single strand): Must be less than 10%
4. Impact Force: Tested during the first factor 1.739 fall (4meter fall on 2.3meters of rope).
- Single Ropes: Impact must be less 12 kilonewtons (kN) using an 80kilogram mass.
- Twin Ropes (2 strands parallel): Same as Single ropes, but using both strands during the test.
- Half Ropes (single strand): Impact must be less than 8kN, tested using a 55 kilogram mass.
5. Falls Held: Number of falls rope holds before breaking.
- Single Ropes: Must hold 5 falls of an 80kg mass.
- Twin (two strands): Must hold 12 falls of an 80kg mass.
- Half (single strand): Must hold 5 falls of a 55kg mass.
Here's where it gets a little confusing. UIAA 101 (Union Internationale des Associations d'Alpinisme) the UIAA standard for Dynamic Ropes uses most of the procedures and requirements set forth in EN892, with a couple of addendums.
- They limit sheath slippage to no more than 20mm or 10% and
- they add in a requirement for Dynamic Elongation measured during the first dynamic drop of no more than 40% elongation.
Hope this helps,