how to

Prusik Hitch for Climb Assist and Hauling

· 3 min read knotsclimbingrescuerope-work

A prusik is a small loop of thinner cord tied around a larger rope with a friction hitch that grips when loaded and slides when loose. Climbers use it as an ascending aid and a backup below a rappel; rescuers use paired prusiks in haul systems. Because the hitch can be released and repositioned by hand, it converts any fixed line into an adjustable anchor point.

What you need

  • A 5 to 6 mm accessory cord tied into a loop with a double fisherman knot, roughly 60 cm circumference
  • A host rope of larger diameter, typically 9 mm or thicker
  • Gloves; sliding prusiks under load generates heat

Step by step

  1. Tie your cord into a closed loop using a double fisherman knot and dress it tight; inspect the tails are at least 5 cm.
  2. Wrap the loop around the host rope three times, starting with the fisherman knot positioned away from where you will grip.
  3. Pass the loop through itself once per wrap, spiraling downward so each turn lies flat beside the previous one without crossing.
  4. Dress the wraps neatly so they sit parallel and snug; crossed or gapped wraps slip instead of gripping.
  5. Test below waist height before trusting it: load the loop sharply with body weight and confirm the hitch locks rather than skates.
  6. To move the hitch upward while unloaded, push the bottom wraps with your thumb so the whole bundle slides; never shove the top wrap alone.
  7. For rappel backup, girth-hitch the prusik loop to your leg loop or central point, attach it below the belay device, and let it trail slack; if you release the brake, it locks the rope.
  8. In hauling systems, place a second prusik as a progress-capture device on the anchor side so the raised load cannot slide back when you reset your pull.

Common mistakes

  • Using cord too close to host-rope diameter, such as 7 mm on 8 mm rope; the hitch cannot generate grip and slides under load
  • Too few wraps on icy or stiff ropes; go to four or five wraps when conditions are poor
  • Letting the prusik sit jammed against a carabiner or knot during hauling, which fuses it in place and forces a cut rescue

Related guides

The double fisherman joining your cord loop is a cousin of [[sheet-bend-different-ropes]] for same-diameter lines, worth reading for tuck mechanics. Keep your accessory cords organized between trips with [[coil-rope-properly]], and whip the loop tails using [[whip-rope-ends]] to stop the braid migrating inside the sheath.

← All guides