Excavations
Collapse, falls, services, water, atmosphere, plant surcharge, access, inspections and emergency response around excavations.
How to prepare for the CITB Operatives test
Connect hazard recognition with safe action: stop, protect, follow the site system and escalate to the right competent person.
Core concepts
Concept 1
Excavations can collapse without warning and require suitable support or battering, edge protection, safe access and competent inspection.
Exam cue: Do not enter until the protection and inspection arrangements are confirmed.
Concept 2
Spoil, materials and plant loads should be kept far enough from edges, with vehicle movement controlled to avoid surcharge and falls.
Exam cue: Use designated access and keep barriers, stop blocks and spoil controls in place.
Concept 3
Underground services, water ingress, hazardous atmospheres and adjacent structures must be addressed before entry and as conditions change.
Exam cue: Leave and report cracks, bulging, water, fumes, damaged support or other change.
Risk pitfalls and guardrails
Entering a short or shallow trench because it seems unlikely to collapse.
Guardrail: Do not solve a missing guard, isolation, barrier, competent plan or engineering control only with a warning or PPE.
Climbing on trench supports instead of using safe access.
Guardrail: Do not solve a missing guard, isolation, barrier, competent plan or engineering control only with a warning or PPE.
Parking plant or stacking spoil at the edge.
Guardrail: Do not solve a missing guard, isolation, barrier, competent plan or engineering control only with a warning or PPE.
Memory anchors
No Unsupported Entry
Depth alone does not decide collapse risk; use the planned protection.
Edges Carry Loads
Keep spoil, materials and plant away so they do not overload or fall into the excavation.
Access Is Designed
Use the provided ladder, stair or ramp rather than supports or buckets.
Inspect After Change
Weather, vibration, damage and other events can invalidate an earlier inspection.
Services Before Dig
Plans, locating and safe digging are needed before the ground is disturbed.
Crack, Water, Fume: Leave
Exit safely and report signs of instability or dangerous atmosphere.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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