What is the length and diameter of the Rescue line in life safety rope inventories?

• A. 11-13mm, 50m Red
• B. 1-13mm, 50m Blue
• C. 8-11mm, 100m
• D. 3-11mm, 100m

Answer: (C)

In life safety rope inventories, the rescue line is specified by diameter and length because those traits determine handling, strength, and reach during rope-rescue operations. The rescue line is typically 8 to 11 millimeters in diameter and about 100 meters long. The 8–11 mm size balances sufficient strength with ease of handling in tight spaces and during hauling or belaying. A 100-meter length provides enough rope to reach anchors and belay stations in most vertical or long-distance setups without needing to splice or join multiple pieces, which reduces weak points and deployment time. Shorter lengths like 50 meters can be limiting for taller structures or large trees, while thicker diameters add unnecessary weight and stiffness.