Missing Guardrail on a Working Platform
A three-storey reinforced concrete frame is under construction in Shah Alam. The scaffold on the north face was erected two days ago but has no tag. A supervisor tells two general workers to carry 4 m timber lengths onto the level 2 working platform, saying it will take 'ten minutes only'. The access bay has a guardrail on one side only; the toe board is missing and two scaffold planks are unsecured. One plank has a visible crack. The workers have body harnesses, but the nearest suitable anchor is about 4 m away and their lanyards are 1.8 m long. The platform is 5.6 m above a concrete hardstand. Wind is gusting and loose offcuts are on the planks. A mobile crane is operating 10 m away. The workers have not seen the scaffold inspection record and do not know who the competent person is. One says he has used scaffolds 'like this' before and wants to finish before the rain.
1. Should the workers step onto the platform? Explain the decision using the hierarchy of control and the information given.
Read the worked answer
No. The platform is not a safe place to work, and the ten-minute duration does not change that. A fall from 5.6 m can be fatal, and the risk exists from the first second of exposure.
Apply the hierarchy:
- Eliminate: do not use the platform for this task; move the timber by another route or use a MEWP or crane with a proper lifting plan.
- Engineering: the scaffold must be completed by a competent scaffolder - guardrail on the open side, toe board, planks secured, cracked plank replaced, safe access ladder.
- Administrative: inspection by a competent person, scaffold tag showing status, toolbox talk, exclusion zone below.
- PPE: the harness is the last line, not the first. The nearest anchor is 4 m away and the lanyard is 1.8 m, so there is no suitable anchor and a fall would involve swing and possibly a 1.8 m free fall before the lanyard acts.
The unsecured planks, offcuts and gusting wind add slip and trip risks. The workers should not step on, and should report the instruction to the site safety supervisor.
2. What should happen before the timber is moved, and who should authorise it?
Read the worked answer
Before the timber is moved, the access bay must be closed off and the scaffold brought to a complete, tagged condition. The competent scaffolder should fit the missing guardrail and toe board, secure or replace the planks, and provide proper ladder access. A competent person should inspect and tag the scaffold; the inspection record should be available and the tag should show the date and status. The supervisor and site safety supervisor should agree the method - perhaps a MEWP or crane lift - and brief the workers. The workers should confirm the tag and anchor points before starting. Authorisation should come from the site safety supervisor or scaffold competent person, not from a production supervisor alone.
3. If the supervisor threatens to replace the workers for refusing, what should they do?
Read the worked answer
They should politely refuse and escalate: 'We will not go on until the scaffold is complete and tagged.' They should inform the site safety supervisor and record the instruction, date and time. A threat of replacement should be reported to site management and, if the unsafe instruction continues, through the site's reporting channels to CIDB or DOSH. The aim is to stop the job, not to win an argument; a written note and a photo of the missing guardrail help show the condition at the time. Refusing an unsafe task is consistent with the worker's duty to take reasonable care of himself and others and to report hazards.