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Accident Causes
and Preventions
Safety Control Division
Occupational Safety and Health Center
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Global OSH Data: ILO Report
Every year, 337 million workers fall victims of occupational accidents and diseases
• work-related accidents and diseases cause > 4 days absence
• 2.3 million men and women workers die of work-related accidents and diseases each year
• 360,000 fatal accidents
• 1.95M fatal diseases
Source: ILO Safework -
Introductory Report - 2008
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• Of the 360,000 fatalities –
around 17% (or 1 in every 6) are from the construction industry
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This means that:
At least 60,000 fatalities occur at construction sites, around the world, every year
• 1 fatal accident occurs every 10 minutes
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Common Reasons for
Accidents Layman’s version:
‘Oras na niya’
‘Malas niya lang’
‘Tanga kasi’
‘Kasama sa trabaho’
NOT REAL CAUSES --- ONLY EXCUSES!
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Accident Accident is an event that is
unexpected,
unplanned and
unwanted
that results in harm to people, cause damage or loss to properties.
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OSHC Study (1998)
Factors That Contribute
to the Occurrence of
Accidents in the
Construction Industry
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Type of
Project
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Type of
Accident
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Injured Part of the Body
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Type of Trade
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Month of Occurrence
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Time of Accident
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Accident Theory
People
Environment
Materials
Equipment
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Primary Causes of
Accidents
Unsafe Act
Unsafe Condition
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The human action that departs from a
standard job procedure or safe practice,
safety regulations or instructions.
Unsafe Act
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Unsafe Acts Operating Equipment without Authority
Disregard of SOP or instructions
Removing Safety Devices
Using Defective equipment
Using improper PPEs or Using PPEs improperly
Horseplay
Working in an unsafe posture
Absent-mindedness / Nervousness
Willful intent to injure
Working while under the influence of alcohol or drugs
Improper lifting and carrying
Lack of knowledge or skills
Failure to understand instructions
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Unsafe Condition
The physical or chemical property of a material, machine or the environment which could result in injury to a person, damage or destruction to property or other forms of losses.
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Unsafe Conditions
Wet slippery floors
Unstable stacking of materials
Protruding re-bars
Live conductors without insulation
Equipment without machine guarding
Poor storage of combustible materials
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Requires the promotion of safe
behaviours and maintenance
of a safe working environment.
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Controlling Unsafe Acts
Reward: Financial bonus
Promotion
Extra responsibility
Incentive schemes
Active Encouragement of Involvement in: Decisions on Consultation
Risk Assessments
Safe Systems of Work
Provision of: Training
Good Working Environment
Welfare Facilities
Explanation of Ultimate Consequences
Consistent/Controlled Discipline
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Last line of defense
Engineering Control :
Elimination/Substitution/Minimization
Isolation/Enclosure of the Hazard
Personal Protective Equipment
Administrative Control :
Safe work practices, Signs and signage, Training and education,
Systems to Control Unsafe Conditions
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Hazard Control
The first consideration for controlling hazards is
to eliminate the hazard or substitute a less
hazardous material or process.
Performing good housekeeping will eliminate slip and
tripping hazards
An example of substitution method is utilizing a water-
based paint rather than a solvent-based paint. This
control measure minimizes flammable vapors as well
as eliminates health concerns associated with
solvent-based paints.
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If hazards cannot be eliminated, then:
Enclosed Hazard Enclosure of the hazard, such as enclosures for noisy
equipment.
Isolate Hazard Isolation of the hazard with interlocks, machine
guarding, welding curtains, and other mechanisms.
Remove / Redirect Hazard Removal or redirection of the hazard such as with
local and exhaust ventilation.
Redesign Workplace Redesign of workstation to minimize ergonomic
injuries.
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Examples of administrative controls include:
Limiting time exposure to hazards
Provisions of safety signage
Provisions of written safe operating procedures
Conduct of job hazard analysis, and
Creation and implementation of safety and health rules for employees.
If engineering controls
are not feasible then consider implementing administrative controls
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Personal Protective Equipment as Last Line of Defense in Control Measures
PPE is acceptable as a control method in
the following situations:
Engineering controls do not eliminate hazard
While engineering controls are being
developed
Administrative controls and safe work
practices are not sufficient protection, and
During emergencies.
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Personnel Protective Equipment
Personnel protective equipment (PPE) may be
broadly divided as follows:
Head Protection
Hearing protection.
Respiratory protection.
Eye and face protection.
Hand protection.
Foot protection.
Protective clothing.
PPE does nothing to stop the hazard at source,
but simply serves as a barrier protection to
reduce the severity of the potential accident.
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