Prusik knot: Difference between revisions

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== Diameter recommendations ==

Based on the cord load limits, 5 mm (5.1 kN) and 6 mm (10 kN) reep cords are generally recommended for tying Prusiks.<ref>{{cite web | url=https://www.mytendon.com/en/products/accessories/accessory-cords/c-23/ | title=Acessory cords | publisher=LANEX a.s. | author=LANEX a.s. | website=tendon.cz | access-date=16 August 2025}}</ref> General rule of a thumb is that to ensure a reliable blocking, Prusik cord diameter should be roughly 1/2 of a diameter of the rope on which the Prusik is tied. For a standard climbing rope (~9.7 mm), the slightly-above-recommendation 6 mm cord has the advantage that it is easier to loosen ~~and~~ its loading limit is twice the one of the 5 mm cord. However, in some rope-Prusik combinations, it might not block readily enough. In some cases, 5 mm Prusik is nearly impossible to loosen under and after load. Testing in safe environment is therefore highly recommended both for the 5 mm and the 6 mm cord.

Based on the cord load limits, 5 mm (5.1 kN) and 6 mm (10 kN) reep cords are generally recommended for tying Prusiks.<ref>{{cite web | url=https://www.mytendon.com/en/products/accessories/accessory-cords/c-23/ | title=Acessory cords | publisher=LANEX a.s. | author=LANEX a.s. | website=tendon.cz | access-date=16 August 2025}}</ref> General rule of a thumb is that to ensure a reliable blocking, Prusik cord diameter should be roughly 1/2 of a diameter of the rope on which the Prusik is tied. For a standard climbing rope (~9.7 mm), the slightly-above-recommendation 6 mm cord has the advantage that it is easier to loosen. Another advantage is that its loading limit is twice the one of the 5 mm cord. However, in some rope-Prusik combinations, Prusik from 6 mm cord might not block readily enough. But in some cases, 5 mm Prusik is nearly impossible to loosen under and after load. Testing in safe environment is therefore highly recommended both for the 5 mm and the 6 mm cord.

== References ==

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 == Diameter recommendations ==
-Based on the cord load limits, 5 mm (5.1 kN) and 6 mm (10 kN) reep cords are generally recommended for tying Prusiks.<ref>{{cite web | url=https://www.mytendon.com/en/products/accessories/accessory-cords/c-23/ | title=Acessory cords | publisher=LANEX a.s. | author=LANEX a.s. | website=tendon.cz | access-date=16 August 2025}}</ref> General rule of a thumb is that to ensure a reliable blocking, Prusik cord diameter should be roughly 1/2 of a diameter of the rope on which the Prusik is tied. For a standard climbing rope (~9.7 mm), the slightly-above-recommendation 6 mm cord has the advantage that it is easier to loosen and its loading limit is twice the one of the 5 mm cord. However, in some rope-Prusik combinations, it might not block readily enough. In some cases, 5 mm Prusik is nearly impossible to loosen under and after load. Testing in safe environment is therefore  highly recommended both for the 5 mm and the 6 mm cord.
+Based on the cord load limits, 5 mm (5.1 kN) and 6 mm (10 kN) reep cords are generally recommended for tying Prusiks.<ref>{{cite web | url=https://www.mytendon.com/en/products/accessories/accessory-cords/c-23/ | title=Acessory cords | publisher=LANEX a.s. | author=LANEX a.s. | website=tendon.cz | access-date=16 August 2025}}</ref> General rule of a thumb is that to ensure a reliable blocking, Prusik cord diameter should be roughly 1/2 of a diameter of the rope on which the Prusik is tied. For a standard climbing rope (~9.7 mm), the slightly-above-recommendation 6 mm cord has the advantage that it is easier to loosen. Another advantage is that its loading limit is twice the one of the 5 mm cord. However, in some rope-Prusik combinations, Prusik from 6 mm cord might not block readily enough. But in some cases, 5 mm Prusik is nearly impossible to loosen under and after load. Testing in safe environment is therefore highly recommended both for the 5 mm and the 6 mm cord.
 == References ==