The Incomplete Guardrail
During a refurbishment, a 4.0 m platform-height tower is being used for ceiling works. A supervisor notices that on one side the platform has a top rail at about 1.0 m but no intermediate rail. The toe board is missing along the wall side and at one end. The platform is made from two 0.6 m boards with a 100 mm gap between them, and the access hatch is propped open with a timber offcut. A worker is standing on a 300 mm plastic crate to reach a ceiling fixing. The tower has been in use since the previous day, and the users say it was 'checked this morning'. The supervisor must decide whether to stop work, what to correct, and whether the tower can be used for the rest of the shift.
1. Identify the non-compliances and explain why each matters.
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The missing intermediate rail leaves an unprotected gap between the top rail and the platform that is large enough for a person or materials to pass through; a complete guardrail system should normally provide a top rail at about 1.0 m, an intermediate rail and a toe board, with no unprotected gap exceeding the permitted limit. The missing toe boards on the wall side and one end mean tools or materials can be kicked or blown off the platform, and the wall side is not automatically safe just because a wall is nearby. The 100 mm gap between platform boards can allow feet, tools or small components to fall through and can make the platform unstable underfoot. The propped-open hatch defeats the purpose of the hatch and creates an open hole. Standing on a plastic crate is unsafe because it is not a designed platform and can slip or collapse. The 'checked this morning' statement is not adequate evidence because the check may have been visual only or may have missed the missing parts.
2. What immediate action should the supervisor take?
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The supervisor should stop work on the tower immediately, ask the worker to come down and remove the crate from the platform. The tower should be barricaded or tagged 'do not use' so that nobody else accesses it while it is non-compliant. The supervisor should not allow the tower to be used for the rest of the shift until the correct components have been fitted and the tower has been re-inspected by a competent person. If the missing intermediate rail, toe boards or platform boards cannot be replaced with matched components from the same tower system, the tower should be dismantled or quarantined. The supervisor should also check whether anyone has been working at height without proper protection and whether the previous day's inspection record actually exists. The immediate priority is to prevent a fall or a dropped object, not to finish the ceiling work quickly.
3. How should the tower be corrected and returned to use?
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The tower should be corrected using the manufacturer's matched components: fit the missing intermediate rail and toe boards, replace or reposition the platform boards so that the platform is fully decked and secure, and close the hatch except when access is needed. The guardrails should be complete on all sides, including the side near the wall, unless the manufacturer's instructions specifically permit otherwise. After correction, a competent person should inspect the tower against the manual and the inspection checklist, including the guardrail heights, toe boards, platform fit, hatch, access ladder or internal stairs, base plates and stabilisers. The inspection should be recorded, and the tower should only be released for use when it is complete. The users should also be reminded that a daily visual check does not replace the formal inspection after alteration or after a defect has been found.