Slopes: maximum grade to avoid

Slopes: maximum grade to avoid

• A. 5%
• B. 0%
• C. 20%
• D. 11%

Answer: (D)

In rope operations, there’s a practical safety limit for how steep a slope you should avoid because the force pulling a load downhill increases with slope while your ability to control that load with friction, footholds, and gear doesn’t scale as well. The threshold is a gentle incline, just over a one-in-ten rise, where you still have reliable control over the rope and equipment. Beyond this point, guiding or belaying becomes much harder, the risk of an uncontrolled slide increases, and gear and anchors are stressed more. On flatter ground you can manage tension and movement more easily; on much steeper slopes the risk rises quickly. So the upper limit used in practice is that modest incline, the point where control starts to become unreliable if you go steeper.

In rope operations, there’s a practical safety limit for how steep a slope you should avoid because the force pulling a load downhill increases with slope while your ability to control that load with friction, footholds, and gear doesn’t scale as well. The threshold is a gentle incline, just over a one-in-ten rise, where you still have reliable control over the rope and equipment. Beyond this point, guiding or belaying becomes much harder, the risk of an uncontrolled slide increases, and gear and anchors are stressed more. On flatter ground you can manage tension and movement more easily; on much steeper slopes the risk rises quickly. So the upper limit used in practice is that modest incline, the point where control starts to become unreliable if you go steeper.