ergonomics in carpentry
TRANSCRIPT
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Ergonomics Assignment- II‘Ergonomics in
Carpentry’
Submitted By: -Ishan Rastogi (08)Mona Kumari (12)Prerna Tirkey(18)
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INTRODUCTION
Carpentry is the art or science of measuring, cutting, fitting, and assembling wood to construct buildings or other structures.
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Symptoms of Professional Health Hazards related to Carpentry
• Continual fatigue or lack of endurance• Cold hands, particularly in the fingertips• Changes in the skin colour of hands or fingers• Swelling • Numbness• Tingling• Weakness• Loss of sensation• Aching, burning, or shooting pain
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Problem Areas
• Back• Hands • Neck• Fingers• Shoulders• Knees• Arms
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Reasons for injuries • Performing the same or similar movement over
and over without breaks, rest, or time for recovery.• Exerting force to perform a task or to use a tool.• Working in awkward positions such as bending, stooping, twisting, and overhead reaching.• Remaining in the same position for a long time with little or no movement.• Continuous pressure from a hard surface or edge on any part of the body.• Working in extreme temperatures, such a climate or those produced by equipment or machines.• Sitting on, standing on, or holding equipment that vibrates.
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Distribution of health complaints (%) related to poor ergonomic practices among carpenters in small-scale industries
Health complaints Percentage (Sample size=270)
Electric shock 16.6%
Excessive noise 27.7%
Excessive heat 22.2%
Exposure to metal dust 3.7%
Repetitive strain injuries 14.8%
Repetitive motion injuries 25.9%
Chronic back pain 16.6%
Chronic neck pain 35.1%
Chronic shoulder pain 33.3%
Absence of a worktable or a bench 3.7%
Painting above shoulder level 6.3%
Source: L.M.B. Rongo ; Are workers in small-scale industries in Dar es Salaam aware of occupational ergonomics principles?
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Most common injuriesBack - 21% Fingers/Hands -
15% Knees - 7%
Source: ERGONOMIC SURVIVAL GUIDE FOR C A R P E N T E R S a n d F R A M E R S; Consultation CAL OSHA service
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Some Major Problems:
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Musculoskeletal disorder
• Application of force• Repetitive motion• Overall muscular fatigue• Contact stress• Awkward posture.• Manual handling tasks• Combinations of physical tasks performed for more than 1 hour at a time
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Application of force
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Back Strain◦Unbalanced carrying or lifting (e.g., the
bulk of the load supported by one side of the body)
◦Unstable, unbalanced, difficult, or awkward to handle loads being moved.
◦Back muscle strain and Spinal Estenosis
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Wrist and shoulder injury
◦Application of force
◦Extension◦Hand Stretch◦Awkward posture ◦Bad handling of tools
◦Acute Trauma Disorder
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Twisting and repetition
◦Bones and muscles will get weak.
◦Muscles and ligaments sprains
◦Bones displacement
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Poor Lighting
◦Glare◦Refraction and Reflection
◦Light source◦Environment and contrast
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Working in a bent or stooped posture for a long time may cause fatigue and strain the lower back,
neck, and shoulders.
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Lifting or carrying loads that are too heavy may cause a serious back injury.
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Working overhead and reaching for long periods of time may lead to
lower back, arm, shoulders, and neck injuries.
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Repetitive motion
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Overall muscular fatigue
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Grip/Contact stress
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Awkward posture
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Manual handling tasks
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Fingers and forearm stress
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Elbow stress
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Poor housekeeping/work environment
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Hand tool usage
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Ergonomic Check List
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Key to Check List
Colour Code:
High risk
Medium risk
Low risk
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ReferencesCARPENTRYII; Subcourse EN5156; EDITION B;
United States Army Engineer School; Fort Leonard Wood, Missouri 65473
Ergonomics Demonstration Projects in Carpentry, Labourers, Rebar and Concrete Finishing; Department of Labour and Industries, December 2001
L.M.B. Rongo; Are workers in small-scale industries in Dar es Salaam aware of occupational ergonomics principles?
Ergonomics Survival Guide for Carpenters and Framers; Consultation CAL OSHA service
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Thank You!!