26 Mar 2026
PLANNING WORK AT HEIGHT: RISK ASSESSMENTS & SAFE SYSTEMS OF WORK
In the previous article, we explored the risks and legal responsibilities of working at height. The reality is stark: most accidents don’t happen because of bad luck - they happen because of poor planning.
Effective planning is the single most important factor in preventing falls. In this guide, we’ll walk through how to properly assess risks, apply the hierarchy of control, and implement safe systems of work.
Why Planning Is Critical
Failing to plan work at height properly can lead to:
- Unsafe equipment choices
- Lack of fall protection
- Poor supervision
- Increased likelihood of human error
In many accident investigations, a common conclusion emerges:
The task was not properly assessed before work began
The Hierarchy of Control (Explained)
The Work at Height Regulations are built around a hierarchy:
1. Avoid Working at Height
Can the task be done from the ground using:
- Extendable tools
- Remote systems
- Pre-assembly at ground level
2. Prevent Falls
If height work is unavoidable:
- Use scaffolding with guardrails
- Install edge protection
- Use MEWPs
3. Minimise Consequences
If a fall occurs:
- Use harnesses and fall arrest systems
- Install safety nets
Case Study: Ladder vs Scaffold Decision
A company chose to use ladders for repeated maintenance work instead of installing scaffolding.
Result:
- Worker fell while overreaching
- Serious injuries
- Investigation found wrong equipment choice was the root cause
This highlights a key principle:
The cheapest option is rarely the safest.
Risk Assessments: Step-by-Step Guide
A proper risk assessment should include:
1. Identify Hazards
- Fragile surfaces
- Weather conditions
- Access issues
- Falling objects
2. Identify Who Is at Risk
- Workers
- Contractors
- People below
3. Evaluate Risks
- Likelihood of a fall
- Severity of potential injury
4. Implement Control Measures
- Guardrails
- Safe access equipment
- PPE where necessary
5. Review and Update
-
Conditions change -your assessment should too
Choosing the Right Equipment
Selecting appropriate equipment is critical.
Ladders
Best for:
- Short-duration tasks
- Low-risk environments
Common mistake:
- Using ladders for prolonged or complex work
Scaffolding
Best for:
- Long-duration work
- Tasks requiring stability
MEWPs (Mobile Elevated Work Platforms)
Best for:
- Quick access to height
- Work requiring mobility
Safe Systems of Work
A safe system of work ensures tasks are carried out consistently and safely.
This includes:
- Method statements
- Permit-to-work systems
- Supervision and communication
Case Study: Poor Planning Leads to Fatality
A worker was sent to repair roof damage without:
- A risk assessment
- Fall protection
- Proper supervision
He fell through a fragile surface.
The investigation concluded:
No safe system of work was in place.
Key Takeaways
- Planning is not optional - it’s a legal requirement
- Risk assessments must be practical, not just paperwork
- The right equipment choice can prevent accidents entirely
- Safe systems of work save lives
What’s Next?
Planning is only effective if it’s followed through properly.
In the final article of the Working at Height series, we’ll explore:
👉 Working at Height Safely: Equipment, Training, and Best Practices
