How far do you stop from the object for clamshell?

• A. 2 ft
• B. 3 ft
• C. 5 ft
• D. 6 ft

Answer: (C)

When using a clamshell attachment, you need a clear stopping distance to account for bucket swing, hydraulic movement, and any small misjudgments as you position and lower the bucket. The clamshell can move toward the object unexpectedly as you extend or curl the bucket, so having a five-foot gap provides a safety margin to prevent contact and gives you room to react.

Five feet balances safety and practical work pace: it’s enough room for the bucket to settle into position without hitting the object, while still allowing efficient operation. If the distance is too short, even a minor swing or tilt can cause contact; if it’s more than necessary, you’re wasting distance and could slow the job. In normal conditions, keeping about five feet is the standard safe practice.

If you’re working in tighter spaces or with unusual loads, adjust with caution, but the five-foot rule is the baseline to reduce the risk of impact and injuries.