Working at Height with MEWP
You are installing new gutters and fascia on a two-storey building. The roof edge is 8 m high. You have hired a mobile elevating work platform (MEWP) – a scissor lift. The ground is uneven and sloping. The MEWP operator has a valid IPAF card but has not used this model before. The weather forecast is for rain and wind increasing to 30 mph in the afternoon. The site has overhead power lines nearby. The client wants the work done in one day.
1. What are the key hazards and how should they be controlled?
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Key hazards: falls from height, MEWP overturning due to uneven ground, electrocution from overhead power lines, weather (wind and rain), and lack of familiarity with the MEWP model. Controls: 1) Ground conditions: ensure ground is firm and level; use spreader pads if necessary; check slope is within MEWP limits. 2) Operator competence: even with IPAF card, ensure familiarisation with the specific model; provide training and supervision. 3) Overhead power lines: identify voltage and safe clearance distances; consult the electricity supplier; use goalposts or barriers; if necessary, isolate power. 4) Weather: monitor wind speed; stop work if wind exceeds manufacturer's limit (often 28 mph for scissor lifts); rain can make surfaces slippery. 5) Fall protection: use harness and lanyard in MEWP if required by risk assessment; ensure guardrails are in place. 6) Rescue plan: have a plan for rescue if someone falls or MEWP fails. 7) Site management: ensure a safe system of work, including a permit to work if required, and supervision.
2. What should you do about the overhead power lines?
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Overhead power lines are a serious hazard. You must first identify the voltage and the safe clearance distances (e.g., for 11 kV, 3 m; for 33 kV, 4 m; for 132 kV, 6 m – check HSE GS6). Then, consult the electricity supplier to see if the lines can be diverted or isolated. If not, use physical barriers such as goalposts and warning signs. Ensure the MEWP never breaches the safe clearance. If work must be done near lines, use a competent person to plan and supervise. Never store materials or park plant under lines. If the lines are low voltage, you may need to isolate. Always assume lines are live unless confirmed otherwise.