Pole installation depth for belay systems is:

Pole installation depth for belay systems is:

• A. Poles are installed at a depth equal to 10% of their length or a minimum of 4 feet
• B. Poles must be installed at 2 feet
• C. Poles go at ground level
• D. Poles must be 8 feet deep

Answer: (A)

Pole depth for belay anchors is determined by how much of the pole needs to be buried to provide a stable anchor under dynamic loads. The standard rule is to bury the pole to a depth equal to 10% of its length, with a minimum depth of four feet. This means shorter poles still get solid embedment (at least four feet), while longer poles are buried deeper in proportion to their length (for example, a very long pole would be buried about eight feet or more). Fixed depths like two feet or ground level don’t give enough stability, and eight feet only fits the rule when the pole length makes 10% equal to eight feet. So the described method—depth equal to 10% of length with a 4-foot minimum—best ensures a safe, stable belay anchor.

Pole depth for belay anchors is determined by how much of the pole needs to be buried to provide a stable anchor under dynamic loads. The standard rule is to bury the pole to a depth equal to 10% of its length, with a minimum depth of four feet. This means shorter poles still get solid embedment (at least four feet), while longer poles are buried deeper in proportion to their length (for example, a very long pole would be buried about eight feet or more). Fixed depths like two feet or ground level don’t give enough stability, and eight feet only fits the rule when the pole length makes 10% equal to eight feet. So the described method—depth equal to 10% of length with a 4-foot minimum—best ensures a safe, stable belay anchor.