2. CASE STUDY : To conduct anthropometric study of
the working condition of grass weed cutting
labour using the weed cutting machine.
PROBLEM STATEMENT:
The person who works behind the Grass weed cutting
machine is exposed to high vibration and the standing
wrong working posture can invite several physical
problems.
3. HEALTH HAZARDS
• Muscle pains in legs, back and
neck.
• Stiffness in necks and shoulders.
• Motion sickness.
• Sore feet.
• Varicose veins.
• Muscular fatigue.
• Reduction of blood supply to
loaded muscles.
• Immobilization of joints in
spines, hip, knees and feet.
• Bone damage.
• Stomach and digestive
conditions;
• respiratory, endocrine and
metabolic changes
5. RULA ANALYSIS
Arm and Wrist Analysis
Upper Arm Score +2
Lower Arm Score +1
Wrist Score +2
Wrist Twist +1
Posture Score A +3
Muscle Score +1
Force / Load Score +3
Wrist and Arm Score 7
Neck , Trunk and Leg Analysis
Neck Score +3
Trunk Score +4
Leg Score +2
Posture Score B 5
Muscle Score +1
Force / Load Score +3
Neck , Trunk and Leg Score 9
RULA Score 7
6. POSTURE ANALYSIS RESULT
• If for a task RULA score is greater than 6, then there will be a very
high level of risk and calls for immediate attention
• For the task RULA score is 6+ (i.e., 7) which produces very high
level of MSD (musculoskeletal disorders) risk.
7. A TYPICAL VIEW OF A PERSON WHO IS USING REDESIGNED
GRASS CUTTING
8. REMEDIES:
• Ergonomic flexible anthropometric design of grass weed cutting
equipment.
• Reduced vibration by using alternative source for rotating cutting
blades like using motors powered by electric source other than
using an reciprocating engine to rotate the blade.
• Adjustable length of grass cutters extended pipe
• Follow good working posture which is having low MSD risk level.
• Reduction of weight of the equipment.
• Frequent rest period.
• Adjustable handle.
