Heavy Lift AIM

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USING MULTI

‐TIER

RIGGING

SYSTEM

Presented in SciCOP

March 30th , 2012

Presented by :

ABRAHAM IMAM MUTTAQIN

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PRESENTATION OUTLINE

• Critical Lift Planning

•

• Heavy Lift

and

Its

Associated

Design

Tasks

• Lifting Arrangement

• gg ng rrangemen

• 3D Computer Model

• Methodology of

Defining

Lift

Points

Location

• Sling Loads Calculation Result

• Unity Check and Max Deflection Summary

• Miscellaneous Calculation

• Summary

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CRITICAL LIFT PLANNING

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WHAT IS THE CHECKLIST FOR CRITICAL LIFT ?

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HEAVY

LIFT

AND

ITS

ASSOCIATED

DESIGN

TASKS

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HEAVY LIFT USING MULTI‐TIER RIGGING SYSTEM

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LIFTING ARRANGEMENT (PLAN VIEW)

Check this !

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LIFTING ARRANGEMENT (ELEVATION VIEW)

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CRANE BARGE ‐ MOORING ARRANGEMENT

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RIGGING ARRANGEMENT

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3D COMPUTER MODEL

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COMPUTER MODEL (CONT’D)

38.5 M

54 M

See the breakdown !

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LIFT WEIGHT BREAKDOWN DETAILS

ITEM DESCRIPTIONFINAL WEIGHT

(MT)

FINAL WEIGHT (MT),

(incl. 10% cont. factor, for lif ting

anal sis and AH II l i ft in wt1 Structural, includes;

Primary framing & node

Secondary framing & equip. support

ec n eg nos.

Crane pedestal 1003.14 1103.45

Deck platingDrain box and support trimmers

Handrailing & stair landing

Sub-total 1003.14 1103.45

2 Piping spool & supports

Piping Spools 4.067 4.47

Pipe supports (below JM) for Area-E1,

Area-E2, portion of Area-E3 & portion of

Area-E4

74.60 82.06

Pi e su orts on to of JM 2.050 2.26

Added pipe supports to replace scaffold

weight allocation36.200 39.82

Sub-total 116.92 128.61

3 Instrument Items

Field run & support 1.92 2.00

4 Electrical ItemsLighting & Receptacle Supports 1.78 1.96

Field run supports 1.43 1.57

Cable Ladder Supports 19.98 21.98

Cable ladder 2.70 2.97

Sub-total 25.89 28.48

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5 Scaffolding

Scaffolding below JM 13.80 15.18

TOTAL WT. JM SECTION 1161.67 1277.72


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METHODOLOGY OF DEFINING LIFT POINTS LOCATION

To have equal loads on

e s ngs, o er eave

shall be installed at this

points !

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KEY NOTE : TO HAVE AN EQUAL LOAD ON THE SLINGS, ANGLE7 = ANGLE8

(WHICH ENABLED SLING TENSION EQUALISATION FOR THE DOUBLED SLINGS)


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ROLLER SHEAVE DETAILS

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SLING LOADS CALCULATION RESULT

PAIR SLINGS MUST

HAVE EQUAL LOADS !

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UNITY CHECK ‐ RESULT

The maximum deflection is found 180mm at joint 350

while the deflection at lift point (joint 237) is 116mm.

Hence, the actual deflection at structure during

stacking is 64mm.

UNITY

NO.SECTION

CHECK

(MAX.)

431 PG1600 x 628 0.75

2091 PG1600 x 628 0.75

2090 PG1600 x 628 0.56

2094 PG1600 x 628 0.61

2093 PG1600 x 628 0.78

2097 PG1600 x 628 0.52

2063 PG1600 x 490 0.59

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x .

2072 PG1600 x 490 0.63

2074 PG1600 x490 0.63


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MISCELLANEOUS CALCULATION

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THE LIFTING PROCESS

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SUMMARY

• Proper selection of rigging scheme for given module structure and

design of lift points is ESSENTIAL for successful lift installation

points) to

be

provided

such

that

a rigging

system

with

multiple

tiers

of doubled slings minimized the DISTORTION during lifting

‐ Malampaya Weather Deck requires twelves (12) lift points

(Deck size

45m

W

x 90m

L,

Lift

Weight

= 1100

MT)

‐ JM PTTP Arthit Deck requires six (6) lift points

(Deck size 38.5m W x 54m L, Lift Weight = 1279 MT)

• The sheave system must be SMOOTH which minimize the frictional

effect on

the

doubled

slings

• Roller sheave system gives benefit of optimized the rigging system

instead of using spreader beam/frame and demonstrates better

structural behaviour

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Heavy Lift AIM

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