Transcript
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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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