Mobile elevating work platforms (MEWPs)

• Confined overhead working. Brief operators on the dangers and on the safe system of work. If overhead structures could trap an operator and push them onto the MEWP controls, consider a MEWP designed to prevent accidental contact. MEWPs with shrouded or otherwise protected controls are available. Keeping the platform tidy reduces the risk of the operator tripping or losing balance in the basket.
• Ground conditions. Use the platform on firm, level ground. Any temporary covers must be strong enough to withstand the pressure. Local ground features such as trenches, manholes and uncompacted backfill can lead to overturning.
• Outriggers. Outriggers must be extended and chocked before the platform is raised. Spreader plates may be needed, so check the equipment manual.
• Guardrails. Make sure the work platform has effective guard rails and toe boards.
• Preventing ejection or falls. Select personal protection from the MEWP type, task assessment and manufacturer's instructions. Where required, a suitable harness and short restraint lanyard attach to the specified anchor to prevent reaching a fall position. Restraint prevents a fall; arrest stops a fall after it begins and requires suitable clearance and rescue arrangements. Do not assume one harness arrangement suits every platform.
• Falling objects. Barrier off the area round the platform so that falling tools or objects do not strike people below.
• Weather. High winds can tilt platforms and make them unstable, so set a maximum safe wind speed for operation. Storms and snowfall can also damage platforms, so inspect the platform before use after severe weather.
• Handling materials. If the MEWP is used to install materials, check their weight and dimensions and consider manual handling and load distribution. You may need extra lifting equipment to get materials to the work position.
• Nearby hazards. Do not operate a MEWP close to overhead cables or other dangerous machinery, and do not let any part of the arm protrude into a traffic route.
• Operating. Use the controls in accordance with the manufacturer's instructions and the planned operation. Authorised ground staff must know the emergency controls and rescue procedure; the control arrangements differ between machines.

Guardrails

Where there is a risk of a fall from or through a roof structure and there is no other way to prevent it, guardrails should be installed.

Perimeter guardrails should be installed on all exposed edges of a roof, including the perimeters of buildings, the perimeters of skylights and other fragile roof materials, and any openings in the floor or roof. Guardrails come in different forms:

• a proprietary off-the-shelf system
• scaffolding that supports a temporary edge protection system
• timber used to form a guardrail or a physical barrier

Monitor and review any installed guardrails, especially after a storm or another event that could affect their ability to prevent falls.

Summary notes for Element 8 · Cheat sheet · Glossary. A study aid, not published or endorsed by NEBOSH.