Worker killed in elevating work platform rollover
Warning: May contain distressing content to some readers.
In a recent incident, a worker suffered fatal head injuries when a scissor lift type elevated work platform (EWP) fell over. Early investigations found the EWPs platform jammed in an extended position. The EWP was at a height of approximately 8 to 9 metres and was undergoing retrieval maintenance by a technician, when for reasons yet to be identified the EWP has unexpectedly become unstable and tipped. As a result, the operator who was on the platform when the EWP tipped sustained fatal injuries.
These findings are not yet confirmed, and investigations are continuing into the exact cause.
Safety issues
An elevating work platform (EWP) is a device used to support a platform on which personnel, equipment and materials can be elevated to perform work. Types of EWP include self-propelled scissor lifts, self-propelled boom-type, truck-mounted, and trailer-mounted.
An EWP can become stuck with the platform raised in a way that would be difficult to predict. Normally, EWPs are fitted with platform overload devices that prevent the platform being raised when too much downwards force is applied (e.g. by too heavy a load on the platform). However, in this instance, the overload device may have been activated by too much upwards force being applied to one end of the platform. Operators at times will be unable to raise the platform and the technicians sometimes could use a hydraulic jack to raise the jammed end so that the extension platform could be retracted, and the platform could then be lowered by operating the EWP’s controls.
Risks from workers falling or being crushed by EWPs may increase where:
- the platform moves unexpectedly due to:
- unstable ground conditions
- an operator not being familiar with the EWP controls
- mechanical failure of the levelling rod, boom, or hydraulic cylinder mounts
- machine rollover due to ground surface conditions or higher, less stable machine centre of gravity e.g., travelling with the boom extended
- over-balancing while climbing onto platform mid-rails
- units becoming unstable during attempts being made to lower the platform.
Ways to manage health and safety
Effective risk management starts with a commitment to health and safety from those who manage the business. If an incident occurs, you'll need to show the regulator that you’ve used an effective risk management process. This responsibility is covered by your primary duty of care in the Work Health and Safety Act 2011.
Use the hierarchy of controls to help decide how to eliminate and reduce risks in your place of work. The hierarchy of controls ranks types of control methods from the highest level of protection and reliability to the lowest. It’s a step-by-step approach to eliminating or reducing risks. You must work through the hierarchy of controls when managing risks, with the aim of eliminating the hazard, which is the most effective control.
Possible control measures to prevent similar incidents
EWP platforms can sometimes become stuck when a platform is inadvertently lowered on an obstruction (e.g. a roof edge). Training for operators should therefore include information on this potential hazard in addition to the more common hazards (e.g. crushing, overturning, etc). EWP field service technicians should be trained on methods to safely retrieve platforms, including when a platform has been lowered and is stuck. In addition, these technicians should be provided with equipment to carry out EWP retrieval in a safe manner.
Operators must be provided with adequate training, so they are familiar and competent with each type of EWP they use. EWP controls can differ between makes and models, so operators need to know four things in particular:
- where the operator's manual is kept, and what's in it
- the purpose and function of all controls
- what safety devices are fitted specific to that make and model
- how to lower the platform in an emergency.
A prestart inspection should be done before the EWP is used. It is important to keep records of the inspections and make sure there is a process for reporting faults or issues.
Some common prestart inspection items include:
- warning devices
- deadman control
- drive, steering and brakes
- any obvious faults.
Before starting work, always check the work area for any other hazards and potential risk, such as overhead obstructions or other workers in the area. All mobile plant operators should be fully aware of their surroundings while they're working. Distractions such as mobile phones and conversations with other workers should be avoided.
The most common EWP incidents happen when reversing, slewing or elevating near an obstruction or from unexpected movement near an obstruction.
Movement of the EWP should always be slow, deliberate and planned, with careful use of the EWPs proportional controls.
Start with large movements, like driving and elevating the EWP, and finish with finer controls.
If things do go wrong, other workers need to know how to use the ground controls and emergency descent devices for the type and model of EWP being used.
Keep your workers safe when using EWPs and manage the risks when working under overhead obstructions.
Safe operation
Requirements to safely operate EWP include:
- formal and refresher training of operators and record keeping of these
- ensuring the EWP has been inspected and maintained in accordance with the manufacturer’s specification. This may involve checking the logbook or maintenance manual.
- ensuring any outstanding faults or safety issues have been rectified before returning the EWP to service
- assessment of operator competency by a competent person
- elimination of EWP roll over risk through risk management
- safe work procedure development to support training and subsequent safe use
- operator harnessing where an anchor point has been provided
- lock-out procedures that exclude worker access to faulty machines.
Worker/operator obligations
The operator of an EWP must ensure:
- operation is authorised and in accordance with the safe work procedure
- faults are reported
- pre-operational checks are done
- safe working load (SWL) or maximum rated capacity of the platform is not exceeded
- operating speed is consistent with load, terrain and weather conditions and does not exceed the maximum recommended by the manufacturer
- in boom type EWPs a fall arrest harness is worn and is attached to the platform anchorage point with a fall arrest lanyard at all times. The lanyard should be short enough to minimise potential free fall distance but long enough not to restrict movement. Note: on rural boom type EWPs with short booms and very small platforms a sit harness with a very short lanyard intended for travel restraint only may be used.
Competent person
Inspection, maintenance and repair to be carried out by competent persons. A person who is competent to perform an inspection or other task for a control measure is a person who has acquired through training, qualifications or experience, the knowledge and skills to do the task in a safe way. This includes knowledge of relevant Australian Standards, codes of practice, and legislation.
For daily and routine inspection of EWPs, a competent person could be a worker who has been trained in the requirements for the inspections (e.g. use of the checklists and operator manuals).
For annual and major inspections or for major repairs, the competent person is likely to be the manufacturer, an engineering tradesperson, or a professional engineer.
Recordkeeping
The relevant person should keep records of EWP operation, maintenance, structural inspections, and training of workers for the following time periods:
- pre-operation or daily checks – one year
- routine inspection and maintenance – life of machine
- third party mechanical and structural inspections – life of machine
- EWP operator training – duration of employment.
The control measures put in place should be reviewed regularly to make sure they work as planned.
More Information
- Managing the risk of falls at workplaces Code of Practice 2021 (PDF, 3.9 MB)
- How to manage work health and safety risks Code of Practice 2021 (PDF, 0.65 MB)
- AS 2550.10 – 2006 Safe use – Mobile Elevating Work Platforms
- Design registration of elevating work platforms (EWPs)
- Maintenance, inspection, and repair of elevating working platforms (EWPs)
- Safe support of mobile plant guide (PDF, 3.42 MB)
- Worker killed in elevating work platform incident | WorkSafe.qld.gov.au
If this information has caused distress there are services to help:
- Lifeline – 24/7 crisis support service, including phone, texting and chat services.
- Beyond Blue – information and support for anxiety, depression and suicide prevention for everyone in Australia.
- Black Dog Institute – research and resources on mental health in the workplace.
- SANE – helpline service, as well as resources on mental health.
Have you been affected by a workplace fatality, illness or serious injury?
For advice and support, visit our Facebook page or email ohs.coronialliaison@oir.qld.gov.au.