WSH Alert Accident Advisory, 1 June 2020: Worker fatally injured by machine door
1 June 2020, Ref: 2021025
Accident Advisory: Worker fatally injured by machine door
|Ref: 1920103 WSH Alert Accident Notification dated 26 February 2020|
On 24 February 2020, two workers were on a work platform carrying out maintenance works on a scrap metal machine when the overhead door closed downwards and struck both of them. One worker was fatally pinned between the door and the work platform. The other worker sustained minor injuries.
|Figure 1: Overview of the scrap metal machine.|
|Figure 2: Close-up of the accident location.|
Stakeholders such as occupiers, employers, principals and contractors in control of similar workplaces and work activities are advised to consider the following risk control measures to prevent similar accidents:
|Safer machine by design|
• Machines should be designed and built in such a way that it can perform the
intended function without the need to put workers at risk of injury during
operations and maintenance.
• Machines with moving parts must be designed such that workers are protected
through machine guards or other protective devices. Should the workers be
required to work below or near a movable part of the machine (the overhead
door in this case), ensure that the movable part is properly secured (e.g. using
safety retaining pins that can hold the door in place) to prevent accidental
movement. As an added measure, the use of presence sensors may be used to
stop door movement once a person is detected in the vicinity.
|Energy lock-out and tag-out|
• Always isolate, disconnect or discharge all hazardous energy sources (whether
electrical, mechanical, pneumatic or hydraulic) and place the machine on lock-out
and tag-out (LOTO) prior to maintenance or repair works. This is to prevent
accidental machine activation and ensure that machine parts cannot move while
the works are in progress.
• Incorporate the LOTO procedure into safe work procedures so that workers are
guided on how they can carry out the work safely. Refer to SS 571: 2011 Code
of Practice for Energy Lockout and Tagout for more information on LOTO
requirements and procedures.
|Machine declaration of conformity|
• Ensure that the machine manufacturer or supplier has provided a “Declaration
of Conformity”. A declaration of conformity is a formal declaration by a
manufacturer or supplier that the machine meets all local safety requirements
and relevant international standards.
• A declaration of conformity typically includes (non-exhaustive):
– name and address of the manufacturer (or, where appropriate, the
– information on machine model, type and serial number;
– applicable safety requirements and standards that the machine conforms
– identity and signature of the person empowered to draw up a declaration on
behalf of the manufacturer (or the authorised representative).
• Ensure that workers are adequately trained and competent in machine operation
and maintenance prior to assigning work. The training should cover hazard
identification and the WSH aspects of the task at hand.
• Machine operators should be trained to:
– understand the purpose of the energy lock-out and tagout;
– recognise when lock-out activities are in progress; and
– understand the importance of not tampering with the lock-out devices.
• Authorised personnel carrying out servicing and maintenance should be trained to:
• Where applicable, buyers of machineries should work closely with the
• Establish a suitable mode of communication (e.g. walkie-talkie) for situations
where more than one worker is required to work on a machine. This is to
facilitate enhanced situational awareness. This is especially critical for large
machines when workers may not have line-of-sight to each other when working
on the same machine.
Conduct a thorough Risk Assessment (RA) for all work activities to manage any foreseeable risk that may arise when working with machinery. The RA should cover, but not limited to, the following areas:
|• The need for workers to interact with a movable part of the machine;|
• The need for machine guarding or protective devices for movable machine parts; and
• Adequacy of supervision during operation and maintenance of machine.
1. Workplace Safety and Health Act
2. Workplace Safety and Health (Risk Management) Regulations
3. Workplace Safety and Health (General Provisions) Regulations
4. SS 537: Part 1: 2008 – Code of Practice for Safe Use of Machinery Part 1:
5. SS 571: 2011 – Code of Practice for Energy Lockout and Tagout
6. ISO 14120: 2015 Safety of Machinery – Guards – General Requirements for the
Design and Construction of Fixed and Movable Guards
7. ISO 14119: 2013 Safety of Machinery – Interlocking Devices associated with
Guards – Principles for Design and Selection
8. Workplace Safety and Health Guidelines on Safe use of Machinery
9. WSH Council’s Case Studies for Metalworking Industry
10. WSH Council’s Activity Based Checklist on Working Safely with Machines
11. WSH Council’s 6 Basic Workplace Safety and Health Rules for Working with
12. WSH Council’s Article Protect Against Machine Accidents
13. WSH Council’s Toolbox Meeting Kit
14. UK Health and Safety Executive’s Providing and Using Work Equipment
Safely (INDG291 rev1)
15. Waste Industry Safety and Health (WISH) Forum Information Document
– Practical Advice on Lock-off Recycling/Recovery Machinery
Information on the accident is based on preliminary investigations by the Ministry of Manpower as at
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