improvement of work method for lifting the concrete

8/6/2019 Improvement of Work Method for Lifting the Concrete

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Che Mohd Faizul Bin Che Mat Ropi

135552Supervisor: Assoc. Prof. Dr. Rosnah Mohd Yusoff


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Introduction

y In the workplace today, the second greatest reason forlost workdays is injuries that are due to overexertion

when performing lifting procedures (Snook, 1988).yA number of recent studies have indicated that there is

a relationship between occupational tasks involvingfrequent bending, as in repetitive lifting tasks, and

increased risk of low back disorders (NationalAcademy of Sciences, 2001).


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Problem Statement

y Current method = High level of risks

y Substandard design of work system/procedures

y The tool used = Still harmy Occurrence of MSD to the workers.


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Objectivey To study the manhole slab lifting operation.

y Develop work procedures for lifting the concrete slab

of manhole cover.y Design tool for lifting the manhole cover.


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Musculoskeletal Disorders

y Musculoskeletal disorders are injuries or dysfunctionsaffecting muscles, bones, nerves, tendons, ligaments,

joints, cartilages, and spinal discs.y Sprains, strains, tears, pain and connective tissue

injuries


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Recent Tools


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Methodology


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START

Understand the topic and Objective

Visit

Questionnaires and Anthropometric Data

Tool Design

Simulation New Tool Design

Result Analysis

Finalize the Result

CATIA

END

Literature

Simulation Recent Procedures


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Result and Discussions


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Questionnaire Analysis (PLIBEL)Question

1

Neck

2

Shoulders

3

Upper

Back

4

Elbows

5

Lower

Back

Tool or equipment

unsuitable fitted?

3 5 4 2 5

Fatigue because of

operation most

often?

1 3 3 3 5

Which part needs to

exert force most

often?

3 2 2 3

Which part requires

moving repetitively?

4 2 4 2 3

Parts feel pain aftertask?

1 2 1 2

Ever consult

Paramedic

because of physical

problem?

3 3 5

Ever experiences

Affect your job?

3 2 4

6

Wrists

7

Hip/Thigh

8

Knees

9

Ankles/Feet

3 1 3 2

1 1

3 1 1 1

1 2 4 1

2 3

1 1 1

2 1 1


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Recent Procedure Analysis


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RULA Analysis =

Recent


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RULA Analysis = Recent


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Tool DesignSet the selector switchto the LOWERposition and releasethe PML.

Pull handle of PMLout and rotate toON position.

Set the selectorswitch to the neutralposition and spoolsthe chain freely untilit in stable position.

Set the selector switchto UP position anduse the hoists handleto pull or raise themanhole slab.

Push or pull thetool

Push or pullthe tool

Set the selectorswitch to theLOWERposition andrelease awayfrom manholeslab.

Pull handle ofPML out and

rotate toOFFposition andrelease themanhole to itsoriginposition.


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RULA Analysis = New Tool


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RULA Analysis = New Tool


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Comparison ofRULA ScoreRecent Procedure / Tool Improved Procedure / New Tool

Hydraulic Jet

(Minimum Person)

Score 3

INVESTIGATE

FURTHER

Operate the Lever Hoist

(Minimum Person)

Score 2

ACCEPTABLE

Hydraulic Jet

(Maximum Person)

Score 3

INVESTIGATE

FURTHER

Operate the Lever Hoist

(Maximum Person)

Score 2

ACCEPTABLE

T-Hook

(Minimum Person)

Score 5

INVESTIGATE

FURTHERAND CHANGE SOON

Pushing The Tool Design

(Minimum Person)

Score 2

ACCEPTABLE

T-Hook

(Maximum Person)

Score 6

INVESTIGATE

FURTHERAND CHANGE SOON

Pushing The Tool Design

(Maximum Person)

Score 2

ACCEPTABLE


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Comparison ofProceduresTask R ecent Procedures/Tool Suggested Procedures/Tool New Tool Design Procedures

Pick up the tools from the truck Manual Handling Use trolley to move the tools Push or pull the tool design to

desired place

Knock the slab to remove dirt or

rust

1. Hammer :-

y Heavy material

y Short dimension

y Wood handle surface

1.Hammer:-

y Light material (Carbon

Fiber)

y Long dimension

y Rubber handle surface

2.The using of Water Jet

1.Hammer:-

y Light material (Carbon

Fiber)

y Long dimension

y Rubber handle surface

2.The using of Water jetLoosen the bonding of manhole

cover to remove dirt or rust

1.Crowbar

y Short dimension

y Bad handle

1.Crowbar

y Adjustable dimension

y T-Shape handle


1.Crowbar

y Short dimension

y T-Shape handle


Open manhole slab cover from its

position

1.T-Hook

y Bad Shape Handle

y Handle made by plastic

y Unsuitable Length

2.Hydraulic Jet

y Short handle size

y Squad position

y Broken keys

1.T-Hook

y T-Shape handle

y Rubber handle

y Adjustable length

2.Hydraulic Jet

y Longer dimension of

handle size

y Foot jetting

y Use PML instead of hook

1.Lever Hoist used to open

the slab

Move the manhole slab cover to

another site /origin position

1.T-Hook

y Bad Shape Handle

y Handle made by plastic

y Unsuitable Length

1.T-Hook

y T-Shape handle

y Rubber handle

y Adjustable length

1.Push or pull the tool to move

the slab to another site.


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Conclusiony The study observed the new tool design can help in

reducing the risk factor among the workers with

providing the lever hoist, permanent magnet lifter(PML) and tire features on the new tool design.

yAs the conclusion, the objectives of this project havebeen achieved.


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Recommendations

improvement of work method for lifting the concrete

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