Crane & Rigging Safety

Al Ehsaa Housing Project

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TITLE


Health Safety Environment

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Elements of a Lifting Plan


The lifting plan shall include but not be limited to the following considerations:  The 

personnel required

The personnel’s roles, responsibilities and competencies

 Compliance

to statutory requirements and manufacturer's operation

manual for the lifting equipment 

Permit-to-Work system Permit-to-Work system which is mandatory for all lifting operations.

 Nature

and weight and dimension of load – including the NET and

GROSS weights.  Type

and location of lifting lifting / / rigging points.

 Selection

of appropriate lifting lifting equipment, equipment, lifting lifting gear gear and appliances.

 Application Position

of the correct lifting lifting methods methods

of lifting lifting equipment, equipment, personnel and of the load, before and after the lift

operation. Health Safety Environment

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Elements of a Lifting Plan The


work site operation including proximity of other lifting equipment and work

activities. Requirements  Assessment  Means

to erect / dismantle the lifting equipment.

of the need for tagline to control movement of the suspended load.

of communication during lifting operations.

 Environmental

factors detrimental to the lifting operations such as ground

conditions, adverse weather, weather, wind, and poor illumination.  Ensuring

a system for reporting any defects is in place.

 Provision

of a safe place of work for all personnel during lifting operations.

 Separate

the lifting area with proper barricades and signboard to avoid

unauthorized entry.


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Key Factors of a Lifting Plan


Details of Load

Physical & Environmental Factors

Key Factors of a Lifting Plan

Details of Lifting Equipment

Personnel Involved

Means of Communication


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Weight of Load


h

Volume = 3.14 X L X ( R2 - r 2)

Volume =lxbxh

r

R

L

l

Weight = Volume X density densi ty

Weight = Mass X Gravity (9.8m/s 2)


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Center of Gravity


The point at which the entire weight of a body may be considered as concentrated concentrated so so that if supported at this point the body would remain in equilibrium in equilibrium in any position

12 M GRP

Center of Gravity


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Center of Gravity

Ton


3 2 8 5 4 7 6

6 8 7 Ton 2 5 4 3

10 Ton

Center of Gravity


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Selection of Cranes 

Weights and dimensions of loads



Height of lift and distance / areas of movement of loads



Number and frequency of lifts



Period of time for the lifting operation



Ground Conditions



Other Factors



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Lifting Zone

Al Ehsaa Housing Project 350

340 330

360

10

20

Over Front

30

Danger Zone

320

40

310

50

300

60

290

70

280

80

270

Outrigger

260

Caution Zone

Outrigger

90 100

250

110

240

120

Over Rear 230

130

Safe Zone

220

140 210 200

150 190

180

170

160


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Working Zone


*31m

*

Reading are not exact value


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Major Hazards 




Overturning of theClearance Crane Minimum Distance Table Table Voltage

Minimum Clearance Distance in Feet

Upto 50 (kV)

10

Over 50 to 200

15

Over 200 to 345

20

Over 345 to 500 Breaking the Boom Over 500 to 750

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Over 750 to 1,000



Falling Objects



Touching the Overhead Power line Safe Distance from Power line

35 45




Collision with Obstacles 12

Lifting Equipments



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Web Sling - WLL


WLL- Working Load Limit


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Communication - Hand Signals



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Rigging Team Al Ehsaa Housing Project

Lifting Coordinator Crane Operator

Lifting Supervisor

Trained Workers Rigger

Signal Person

Flag Man


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Environmental Factors 

Wind



Weather



Visibility



Object Temperatur emperature e



Chemical Conditions and Exposure



Stability of the Ground



Underground Utilities Health Safety Environment


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Safe Lifting


Safe Lifting Methods Turnbuckles


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Rigging Factors


Positive Load Engagement Load Weight

Load Control

Key Factors of a Rigging Factors Lifting Plan Weight Distribution

Center of Gravity Adequate Sling Length


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Equipment & Lift Criteria 

Single or Multiple Crane



Maximum Planned Operating Radius

 Allowable


Load ( From From Load Chart )



Ratio of Lift to Allowable Allowable Load



Clearance between Boom & Lift



Clearance to Surrounding Facilities



Power Lines & Environmental hazards



Ensure a Clear Load Path



Emergency Set Down Area



Thorough Equipment Inspection Health Safety Environment

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Rigging Considerations 

Sling Selection : Type Type & Capacity



Load Control



Lift point over the center of gravity

 Appropriate

Hitch for CG and Load Control Control



Coordination of Multiple Sling



Positive Sling to Load Engagement



Friction : Sling to load



Load is free to move & is not snagged



Sling capacity is Adequate ( Angle and Tension )

 Adequate


Sling protection. Health Safety Environment

CG- Center of Gravity 21

Safe Working Load ( SWL ) 


Stated as the Normal Working Load (NWL) is the load that a piece of lifting

equipment, lifting device or accessory can safely utilize to lift, suspend, or lower a mass without fear of breaking. Usually marked on the equipment by the manufacturer and is often 1/5 ( 5 : 1) of the Minimum Breaking Strength (MBS) although other fractions may be used such as 1/4, 1/6 and 1/10 

Load represents a force that is much less than that required to make the lifting equipment fail or yield, also known as the Minimum Breaking Load (MBL).

SWL or WLL = MBL( Minimum Breaking Load ) SF(Safety Factor) .

lbf = Pound-Force kN= Kilo Netwon


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Sling Angle Factor


The Sling Angle Factor is aAngle multiplier used to = determine the required sling size when angle -1 Sin (a/c) formed between csling and load is less than 90o a

Avoid rigging rigging loads where angle is less than 45o Click to Calculate Angle

b

90o

60o Health Safety Environment

45o 23

Sling Angle – Tension Factor

Al Ehsaa Housing Project Sling Angle

Tension Factor

90o

1.000

85o

1.004

80o

1.015

75o

1.035

70o

1.064

65o

1.104

60o

1.155

y t i v a r G f o r e t n e C 5

5

55o

1.221

10

10

50o

1.305

15

15

45o

1.414

40o

1.55

35o

1.742

30o

2.000

25o

2.364

20o

2.924

15o

3.861

10o

5.750

5o

11.49

20

20

25

25

30

30

35

35

40

40 45

45 50

50 55

55

60

60 65

70

75 75 80 85 90 85 80

70

65


Remarks

D O O G

N O I T U A C N I N R G A W

R E G N A D

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Calculating Sling Load


Load Angle Factor = L/H

H H

D1

Load On each leg of Sling = Vertical share of Load X Load Angle Factor

D2

Load On each leg of Sling ( S1 S1 & & S2 S2)) = Tension 1 = Load X D2 X L1 / { H (D1+D2) } Tension 1 = Load X D1 X L2 / { H (D1+D2) }


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Sling Angle – Reduction Factor

Al Ehsaa Housing Project Sling Angle

Loss Factor

90o

1.000

85o

0.9962

80o

0.9848

75o

0.9659

70o

0.9397

65o

0.9063

60o

0.8660

55o

0.8192

50o

0.7660

45o

0.7071

25

40o

0.6428

30

35o

0.5736

30o

0.5000

25o

0.4226

y t i v a r G f o r e t n e C

25 30 35

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Remarks

D O O G

N O I T U A C G N I N R A W

40

40 45

45

R E G N A D

50

50 55

55 60

60 65

70

75 75 80 85 90 85 80

70

65


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Load of Capacity -%

Al Ehsaa Housing Project y t i v a r G f o r e t n e C

50.0%

30

30 50.0%

35

57.4%

64.3%

70.7%

35

40

57.4%

40 64.3%

45

Angle

50 76.6%

45 50

55

76.7%

55

81.9%

60

86.6%

60 65

90.6%

65 70

75

94.0%

80

85

90

85

80

75

81.9% 86.6%

70 90.6% 94.0%

96.6% 98.5%

70.7%

96.6% 99.6% 100% 99.6%

98.5%

Capacity Health Safety Environment

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Weight on Slings


Weight in Each Sling = 50 tons / 2 = 25 tons

P=50 tons

Force in Sling = 25 tons / sin 60 o = 28.87 tons

60o

s n o t 5 2 = 2 / P

60o

s n o t 5 2 = 2 / P


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Sling Tension


(H) 15 ft

9 ft

3 ft 12 ft

1lbs= 0.454Kg


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Tension on Each Sling



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Testing & Inspection


All testing testing and and examination examination of of cranes, lifting equipments must be carried out by competent competent examiners examiners and the regular inspections inspections completed completed by competent personnel. All testing, examination and inspection reports and certificates shall be properly recorded.


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Inspection


Right way: way: Saddle on live end

Wrong way: clips reversed

live line dead end

Wrong way: clips staggered


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Anchoring



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Anchoring



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Lift Calculation



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Any Question Health Safety Environment

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THANK YOU YOUR SAFETY SAFETY OUR OUR PASSION Health Safety Environment

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Crane & Rigging Safety

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