When people think about working at height, the first risk that comes to mind is usually falling.
But one of the most serious — and often overlooked — hazards in MEWP (Mobile Elevating Work Platform) operations is crushing, also known as entrapment.
This type of incident develops quickly, often without warning, and can have severe or fatal consequences.
What is Crushing (Entrapment) in MEWP Operations?
Crushing occurs when an operator becomes trapped between the MEWP platform controls and a fixed structure.
Unlike a fall, where gravity is the primary risk, crushing happens when:
- The machine continues moving
- The available space rapidly decreases
- The operator has no room to escape
Common structures involved include:
- Overhead beams
- Roof structures
- Steel frameworks
- Pipework and cable trays
In these situations, the platform doesn’t stop unless the operator stops it — and that delay can be critical.
Why Crushing is So Dangerous
Crushing incidents are particularly dangerous because they:
- Happen very quickly
- Often provide no warning
- Leave little to no reaction time
- Occur in confined or restricted spaces
In many cases, the operator may not even realise how tight the clearance is until it’s too late.
Unlike other hazards, there is often no opportunity to recover once the situation develops.
How Crushing Happens
Crushing typically occurs during:
- Elevation near overhead structures
- Travelling or slewing close to fixed objects
- Working in confined or restricted environments
The risk increases when:
- Visibility is limited
- The operator is focused on the task rather than surroundings
- Clearances are assumed rather than confirmed
- Movements are too fast or uncontrolled
Even a small, controlled movement can become dangerous if the space is tight.
High-Risk Working Environments
Certain environments significantly increase the likelihood of entrapment:
- Steel Structure Construction
Dense frameworks, cross-bracing, and incomplete builds create constantly changing overhead hazards.
- Warehouses & Industrial Facilities
Racking systems, low ceilings, and overhead services reduce available clearance.
- Roof & Overhead Maintenance
Working directly beneath structures places operators in constant proximity to hazards.
- Confined Access Areas
Tight spaces limit machine movement and reduce escape options.
- Utilities & Tree Work
Irregular obstacles like branches or cables can obstruct visibility and movement.
The Role of the Operator
One of the most important things to understand is this:
The machine does not recognise danger — it only responds to input.
That means:
- The machine will continue moving until you stop it
- It will not adjust for obstacles
- It will not warn you of restricted clearance
The responsibility always lies with the operator.
How to Prevent Crushing Incidents
Preventing entrapment comes down to awareness, control, and discipline.
✔ Continuously Assess Your Surroundings
Before and during operation, always check:
- Above you
- Around you
- Behind you
And most importantly — keep checking.
Every movement changes your position and your risk.
✔ Slow Everything Down Near Structures
When working close to any fixed object:
- Reduce speed
- Make deliberate movements
- Avoid sudden inputs
Slower operation gives you more time to react.
✔ Never Assume Clearance
One of the most common causes of crushing is assumption.
Instead:
- Visually confirm space
- Recheck when repositioning
- Be especially cautious in tight areas
If you’re unsure — stop and reassess.
✔ Stop Immediately When Something Feels Wrong
Trust your instincts.
If:
- The space feels tight
- Visibility is compromised
- Something doesn’t feel right
Stop immediately.
Secondary Guarding Systems: A Critical Backup
Many modern MEWPs are fitted with secondary guarding systems designed to reduce the risk of crushing.
These systems:
- Detect pressure or contact
- Automatically stop machine movement
- Help prevent further compression
However, it’s important to understand:
Secondary guarding is a last line of defence — not a primary control.
It should never replace:
- Proper planning
- Operator awareness
- Safe operating practices
Real-World Reality: It Happens Fast
Crushing incidents don’t build slowly.
They happen in seconds:
- A small movement
- A missed obstruction
- A moment of inattention
And suddenly, the space is gone.
Final Thoughts
Crushing and entrapment are among the most serious risks in MEWP operation — not because they are common, but because they are fast, unforgiving, and often irreversible.
The key takeaway is simple:
- Stay aware
- Move with intention
- Confirm your clearance
- And never rely on the machine to protect you
Because when it comes to crushing:
There is no warning.
There is no second chance.
Stay Safe, Stay Smart
At Kwick Access Rentals, we believe that education, awareness, and training are the foundation of safe work at height.
Follow our Smart Start Monday series for more practical safety insights designed to keep your team informed, prepared, and protected.