How to Mark the Middle of a Climbing Rope With Thread

A climbing rope is your lifeline to staying on the rock or slope. Traditionally, a climbing rope is marked in the halfway mark so a climber has a visible sign to indicate the midpoint, telling her to begin preparing for the next pitch. This is a criitical step in rope care. Most modern ropes come with a dyed halfway mark or change colors at the halfway mark. If your rope does not have these markings, take the time to mark the midpoint. Nylon thread is a good option, as it does not absorb moisture and, if done properly, will not slide or move.

Things You'll Need

  • Tape
  • Nylon thread with small, fine needle
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Instructions

    • 1

      Lay out the rope on a long driveway or field. Find the halfway mark; if you know the length of the rope, divide by two and find the middle by measuring from one end. If you don't have the length, measure the full rope and divide by two.

    • 2

      Wrap a piece of tape around the middle. Use this as your reference point.

    • 3

      Thread a small needle with fine nylon thread. Use a bright orange thread or a thread with a color that contrasts with the color of the rope.

    • 4

      Remove the tape and push the needle through the sheath surrounding the kernmantle interior threads. The needle will not compromise the integrity of the rope. Pull the thread through the center of the rope.

    • 5

      Pinch the end of the thread at the point where the needle went through. Take the other end of the nylon thread and make tight coils around the rope, moving down until 1 inch of the rope is wrapped in the nylon coils.

    • 6

      Cut the needle off the thread and pull up 10 to 12 coils. Push the end of the thread through the lifted wraps then pull tight on the end to tighten the coils back around the rope and secure the end of the nylon thread to the rope.