Soil that looks stable might not be. Field tests — not guesswork — keep you safe.
Why It Matters:
Assuming the wrong soil type can lead to using the wrong protection system. That’s how cave-ins happen. Even clay-like soil can shift or crumble if misjudged.
Key Points:
- Never rely on looks alone — visual inspection is just step one.
- Field tests (thumb, plasticity, ribbon) must be done at the start of every dig.
- When unsure, default to Type C and use maximum protection.
- The Competent Person must lead classification — and reassess if conditions change.
✅ Assume nothing. Confirm everything.
Ask the Crew:
- Did we actually test the soil today — or just guess?
- What signs tell us we need to retest?
- Are we taking the cautious route — or cutting corners?