keeping ironworkers healthy - elcosh · 2012-12-18 · lifting 28% ironworkers ergonomic injuries...
TRANSCRIPT
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KEEPING IRONWORKERS HEALTHY:ERGONOMICS AND WMSDs
WMSDs are preventable!
Funded by: With
assistance
from:
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This training is dedicated to the memory of
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GOALS OF THIS CLASS• You will understand: What WMSDs are and
How they develop
• You will recognize: WMSD hazards in
Ironwork
The impact that WMSDs can have on your life
• You will be able to: Reduce your risk of developing WMSDs
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Some hazards in the workplace
can lead to: Overexertion Strains and Sprains Repetitive Motion and
Vibration Injurieswhich are also called…
WMSDs
Work-related Musculoskeletal Disordersor
WMSDs
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WMSDs
WMSDs are occupational disorders of the soft tissues such as:
• muscles
• tendons
• ligaments
• joints
• blood vessels
• nerves
Tennis/Golfer’s Elbow
(Epicondylitis)
Carpal Tunnel
Syndrome
Pitcher’s Shoulder
(Rotator Cuff
Tendinitis) Bursitis
Low Back Pain
Carpet Layer’s
Knee (Bursitis)
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Ergonomic Injuries
43%
Falls19%
Struck by17%
Caught In/Between
5%
All Other16%
IRON WORKERS INJURIES 2006 - 2008
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BODILY REACTION38%
OVEREXERT-PUSH/PULL
7%
OVEREXERT NEC13%
OVEREXERT UNS9%
OVEREXERT CARRYING
5%
OVEREXERTION-LIFTING
28%
IRONWORKERS ERGONOMIC INJURIES 2006 - 2008
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WHAT YOU NEED TO KNOW AND DOTO LAST IN THIS PROFESSION
• Proper body mechanics for iron work
• The importance of your own fitness
• How working as team improves your safety
• Knowing your physical limits
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TESTIMONIALS BY PEOPLE WHO HAVE HAD TO LEAVE THE
PROFESSION DUE TO SERIOUS INJURY (WMSD)
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THIS IS THE MOST USED AND ABUSEDTOOL YOU HAVE
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FORCES ON THE SPINE
Shear
Torque (twisting)
Compression
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THIS IS THE SECOND MOST ABUSED TOOL YOU HAVE
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THIS ONE TAKES A LOT OF ABUSE, TOO
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• Awkward Posture
– Kneeling
– Squatting
– Neck bending > 30º
– Back bending > 30º
– Wrist bending
– Hands above head
– Elbows above shoulders
• High Force– Gripping
– Pinching
THE BIG THREE RISK FACTORS
• High Repetition• Driving pins with beater
• Driving pins with 90
(Rivet gun)
• Driving screws
• Drilling
• Grinding
• Shooting studs
• Tying rebar
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EXPOSURE TO RISK FACTORS
Risk of injury depends upon:
Duration of exposure
Frequency of exposure
Intensity of exposure
Combinations of risk factors
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AWKWARD POSTURES
Kneeling
Neck or back bent forward
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HIGH FORCE: THREADING & TIEING
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HIGH FORCE: WELDING
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AWKWARD POSTURE AND HIGH FORCE
WMSDs are preventable! 19
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AWKWARD POSTURE AND HIGH FORCE
Shoulder and elbow fully extended
WMSDs are preventable!
Cramped spaces
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HIGH FORCE AND HIGH VIBRATION
WMSDs are preventable!
Work involving power hand tools often combines several WMSD risk factors, including vibration, force, posture, contact stress, and repetitive motion
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HIGH HAND & ARM VIBRATION
WMSDs are preventable! 22
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HIGH REPETITION
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– Kneeling
– Squatting
– Neck posture
– Back Posture
– Wrist Posture
– Hands above head
– Elbows above shoulders
– Gripping
– Pinching
• Awkward Posture • High Force
• High Repetition– Driving Pins with
beater
– Driving pins with 90 (rivet gun)
– Driving screws
– Drilling
– Grinding
– Shooting studs
– Tying rebar
THE BIG THREE RISK FACTOR REVIEW
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• HEAVY LIFTING
• FREQUENT LIFTING
• AWKWARD LIFTING
LIFTING
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LIFTING IS REALLY CUMULATIVE TRAUMA
Then, each time you
– bend to lift a bundle of rods
or spool of welding wire,
– bend and twist,
– help your neighbors move
their piano
you provide trauma to the back --
and it adds up over time
From the time you begin lifting and moving materials as a child (making forts, building snowmen, carrying puppies
around, wearing backpacks to school), you are building up wear and tear on your back.
Rod work at Miller Brewing Block House, circa 1950
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BIOMECHANICS OF LIFTING
WASHERS
20#
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HEAVY LIFTING
• Iron and rebar and decking – all the materials of iron work are heavy and the forces generated in working with them are significant.
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FREQUENT LIFTING
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HEAVY LIFTING:USING TOOLS AND EQUIPMENT
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• Use wheels
• Lighten the load
• Provide handles and change shapes (so the load can be carried close to the body)
• Move things closer to you
BETTER LIFTING
• Share the load
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MOVING MATERIALS: HOW
• Plan the lift– Do I need to lift it?
– Can I use a cart or machine to move it?
– How much am I lifting?
– Where is it going?
– What is in the way?
– What is the surface like between me and my destination
• Get as close to the load as possible– Objects put more load on your back the
farther they get from your spine
• Face the load
• Bend your knees whenever possible
• Avoid twisting your back
After heavy lifting, take a
mini-break. Pause a few
seconds to straighten your
back and s t r e t c h.
Ask for help if the load is too heavy or bulky.
The size and shape of what you lift can be as
important as the weight of the object
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LIFTING AND MOVING MATERIALS REVIEW
Planning A Lift:
Do I need to lift it?Can I use a cart or machine to move it?Do I need help to lift it safely?How much am I lifting?Where is it going?What is in the way?What is the surface like between where I am and where I’m going?
Reach for the load by bending, reaching, or squattingLift the loadTransfer the weight of the load to a carrying positionCarry the load to the needed locationDeposit the load by lowering it to the ground, throwing it, or handing it to another iron worker
Moving Materials:
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AWKWARD POSTURES
• Postures that strain the neck, shoulders, elbows, wrists, hands, or back.
• Bending, stooping, twisting, and reaching, are examples of awkward postures.
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AWKWARD POSITION TASKS
PULLING
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KNEELING
SQUATTING
AWKWARD POSTURES
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CLIMBING
AWKWARD POSTURES: Climbing and Clinging
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AWKWARD POSTURES
WMSDs are preventable! 39
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AWKWARD POSTURES
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AWKWARD POSTURES
WMSDs are preventable! 41
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REVIEW: POSITION HAZARDS
Wrist side
deviation
Wrist Flexion Extension
Back bendingKneeling
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WHAT YOU CAN DO
• PLAN YOUR WORK
Bring all the tools and
materials you will
need for the work to
your site before you begin
• CUSTOMIZE YOUR TOOLS
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CONSIDER YOUR ALL YOUR TOOLS
Double-handle Tools: Plier-like tools, measured by handle length
and grip span (the distance between the thumb and forefinger
when the tool jaws are open or closed)
Pictures from NIOSH, A Guide to
Selecting Non-Powered Tools
Single-handle Tools: Tube-like tools, measured by handle
length and diameter.
Pinch Grip: The hand grip that provides control for precision
and accuracy. The tool is gripped between the thumb and
fingertips.
Contact Pressure: Pressure on any part of the body from a
hard surface, point or edge
Power Grip: The hand grip that provides maximum hand
power for high force tasks. All the fingers wrap around the
handle.
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WHAT YOU CAN DO: ROTATE TASKS
WMSDs are preventable!
Different tasks that can be rotated?
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WHAT YOU CAN DO: REST WHEN YOU NEED TO
Even a short break can help
WMSDs are preventable! 46
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WHAT YOU CAN DO: USE PROPER BODY MECHANICS
TRIPODINGWMSDs are preventable! 47
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WHAT YOU CAN DO: STRETCH!
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WHAT YOU CAN DO: HELP EACH OTHER
SHARE THE LOAD!
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Materials should be placed where they are conveniently within reach so body movements are natural.
WHAT YOU CAN DO: Move your materials to YOU
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WHAT YOU CAN DO: RAISE YOUR MATERIAL
Simple support standscan be used to raise
material and equipment from
groundlevel, making lifting and working easier and increasing the weight that can be
lifted.
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PPE
• Boots that fit
– with insoles
• Well-fitting gloves
• Knee Pads
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IMPROVE YOUR PRACTICE
Avoid raising or extending your elbows when working with heavy tools or materials or repetitively.
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IMPROVE YOUR PRACTICE
• Avoid reaching more than 15 in. in front of the body for materials.
• Avoid repeatedly reaching above shoulder height, below waist level, or behind the body to minimize shoulder disorders.
• Avoid repetitive work that requires full arm extension (i.e., the elbow held straight and the arm extended).
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IMPROVE YOUR PRACTICE
• Avoid bending or rotating your wrist. Try bent-handle tools.
• Avoid tools that use a precision finger grip in favor of a full-hand
power grip. – Finger (pinch) grip is 5 times
more stressful than power grip.
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YOU MAY HAVE A PROBLEM IF YOU HAVE ANY OF THESE SYMPTOMS:
• Tingling
• Swelling in the joints
• Decreased ability to move limbs and joints
• Decreased grip strength
• Pain from movement, pressure, or exposure to cold or vibration
• Continual muscle fatigue
• Sore muscles
• Numbness (especially when sleeping)
• Change in the skin color of your hands or fingertips
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