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©M.I.Z 2014, PT Besmindotama Semesta BTS‐OB‐05
DESIGN APPROVAL
OFFSHORE BASKET(14300 MM L x 1200 MM W x 1400 MM H)
MODEL: BTS-OB-05
REVISION: 0
PT. BESMINDOTAMA SEMESTA
Jl. POJ KALIMALANG DS. CIBUNTU, CIBITUNG
BEKASI – JAWA BARAT 17520
INDONESIA
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CONTENTS
TITLE ………………………………………………………………………….... i
1. CONTENTS ……………………………………………………………………. ii
2. GENERAL ……………………………………………………………………… 1
3. DIMENSION AND RATING ………………………………………………….. 2
4. MATERIAL AND CONSTRUCTION ……………………………………….... 3
5. PRESERVATION ………………………………………………………………. 4
6.
MARKING …………………………………………………………………….. 7
7. TESTING AND INSPECTION ……………………………………………….... 8
8. DESIGN CALCULATION FOR LIFTING SETS AND PADEYES …............... 10
OFFSHORE BASKET REFERENCE DRAWING :
Drawing Title:
OFFSHORE BASKET
(Dim. 14300 MM L x 1200 MM W x 1400 MM H)
Drawing Number:
BTS-119-WI-140530-01
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1. GENERAL
1.1.
Operational Environment
The offshore basket is designed and manufactured for repeated use in
transport of goods or equipment, handled in open seas, to, from or
between fixed and floating installations and ships.
It is able to withstand extremes of temperature range -20oC thru 80oC
without effect on the offshore basket strength or weather proofness.
1.2. Standard and Regulation
The offshore basket is built in accordance with technical requirements
of the EN 12079 Part 1 & 2:2006 and DNV 2.7-1:2013
1.3. Design approval of the offshore basket by Bureau Veritas system will be
applied.
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2. DIMENSIONS AND RATINGS
2.1. External Dimensions
Length : 14,300 (±5) mm
Width : 1,200 (±5) mm
Height : 1,530 (±5) mm
2.2. Internal Dimension
Length : 14,100 (±5) mm
Width : 1,000 (±5) mm
Height : 1,200 (±5) mm
2.3. Forklift Pocket
Width (internal dimension) : 288 mm
Height (internal dimension) : 108 mm
Center Distance : 2,050 mm
2.4. Inside Cubic Capacity
Capacity : 19.70 m3
2.5. Ratings
Maximum Gross Weight : 14,700 kgs
Maximum Payload : 10,500 kgs
Estimated Tare Weight : 4,200 kgs
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3. MATERIAL AND CONSTRUCTION
3.1. Bottom Rail
Material : ASTM A.500 Grade B or equivalent quality
Geometry : Rec tangle hollow sec tion
Size : 200 x 100 x t 6.0 mm
3.2. Corner Post
Material : ASTM A.500 Grade B or equivalent quality
Geometry : Rec tangle hollow sec tion
Size : 100 x 100 x t 6.0 mm
3.3. Top Rail
Material : ASTM A500 Grade B or equivalent quality
Geometry : Rec tangle hollow sec tion
Size : 150 x 100 x t 6.0 mm
3.4. Intermediate Post
Material : ASTM A500 Grade B or equivalent quality
Geometry : Square hollow sec tion
Size : 100 x 100 x t 6.0 mm
3.5. Bracing
Material : ASTM A500 Grade B or equivalent quality
Geometry : Square hollow sec tion
Size : 100 x 100 x t 6.0 mm
3.6.
Forklift PocketMaterial : ASTM A.36 or equivalent quality
Geometry : Rec tangular hollow sec tion
Size : 250 x 120 x t 6.0 mm
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3.7. Base Plate
Material : ASTM A.36 or equivalent quality
Geometry : Hot rolled steel plate
Size : t 10.0 mm
3.8. Pad Eye
Material : J IS G 3106 SM 490 YA
Geometry : High tensile strength plate
Size : t 32.0 mm
3.9. Pad Eye Cheek Plate
Material : ASTM A.36 or equivalent quality
Geometry : Hot rolled steel plate
Size : t 6.0 mm
3.10. Properties of Steel Material
Chemical Composition (%)
Material C Si Mn P S
ASTM A.36 0.14 0.18 0.71 0.016 0.005
ASTM A.500 Grade B 0.05 0.02 0.84 0.010 0.008
J IS G 3106 SM 490 YA 0.22 0.55 1.70 0.040 0.030
Mechanical Properties
Material Yield Strength min.
(kg/mm2)
Tensile Strength min.
(kg/mm2)
Elongation min.
(%)
ASTM A.36 250 400 23ASTM A.500 Grade B 317 400 23
J IS G 3106 SM 490 YA 355 490 19
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4. PRESERVATION
4.1.
Surface preparation of steel part
4.1.1. Prior to assembly
All steel parts are pre-shot blasted and coated.
4.1.2. After assembly
- Components : All welded areas of exterior and interior of
assembled offshore basket.
- Process : Manual shot blasting.
- Cleaning : All dirt, dust shot ball etc. to be completely removed
before the basket enters the paint booth.
4.2. Painting
- The offshore basket is airless sprayed outside using zinc rich primer
and acrylic top coat, which is the converted at 60oC.
- The offshore basket is airless sprayed inside using zinc rich primer
and epoxy polyamide finish, which is the converted at 60oC.
- The paint system and thickness are as follows:
Part DescriptionD.F.T
(Microns)
Outside Epoxy zinc rich primer (Including shop primer) 40
Epoxy polyamide zinc phosphate primer 40
Polyurethane top coat 40
Total D.F.T (min.) 120
Inside Epoxy zinc rich primer (Including shop primer) 40
Epoxy polyamide zinc phosphate primer 40
Polyurethane top coat 40
Total D.F.T (min.) 120
Bottom Epoxy zinc rich primer (Including shop primer) 40
Wax. Based under coating 200
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5. MARKING
All offshore basket are to be marked in accordance with the EN 12079-
1:2006, requirements as well as certain customers marks and logos as
indicated below.
The marking applied on the offshore basket will be self adhesive decal of
cast vinyl and seven years life.
Unless otherwise specified, all markings included in this guideline are to be
in decal.
1.
Owner’s code and serial number
The offshore basket serial number has to be placed in accordance with
owner’s requirements.
2. Weight
The weight of the offshore basket is positioned on the right hand door in
such a manner that no information is hidden by door hardware. The
weight shown is the maximum gross weight of the Tool Box, the tare
weight of the container and maximum designed cargo weight. All
weights are to be expressed in kilograms and pounds.
3. Owner’s logo
The owner’s logos are to be placed in accordance with owner’s
requirements.
4. Other
Other markings are affixed in accordance with owner’s requirements.
5. Identification plate.
Identification plate is riveted on the one of the door by stainless steel
blind rivets.
The rivets heads and periphery of the plate are sealed by sealant
except bottom area.
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6. TESTING AND INSPECTION
1. Proto-type Container
Prototype container manufactured in accordance with this
specification will be tested according to the standard classification
container procedures. The deflection of the components during test
are measure with scaled and dial gauges. Upon completion of the
test, the basket will certified by the soc iety with a test report showing
the deflection and variations within the criteria of the permissible
values spec ified in the society’s rules.
2. Testing item and load
(R) Gross Weight = 14,700 kgs
(P) Pay Load = 10,500 kgs
(T) Tare Weight = 4,200 kgs
(S) Sling Weight = 70 kgs
ITEM TEST LOAD
1.
Lifting from the top pad eye
- All pad eye
- Two pad eye diagonally
2.5 x R = 36,750 kgs
1.5 x R = 22,050 kgs
2. Lifting from the forklift pocket 1.6 (T + S) = 6,832 kgs
3. Vertical Impact Test
- Drop test 1 x R = 14,700 kgs
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3. Production Line Container
Every container is manufactured under effective quality control
procedure to meet the specified standards. After completion, all
containers are subject to dimension check, door operation check
and weather proof test. The offshore basket will be inspected by the
surveyor of the classification society and identified with the
appropriate society seal when they meet the standards of this
specification.
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7. DESIGN CALCULATION FOR LIFTING SETS AND PAD EYE
1. Objective
To determine quad assembly (master link & intermediate), sling &
shackle.
To determine minimal required breaking strength of lifting sets and pad
eye strength.
2. Design Reference
EN 12079 Part 1 & 2:2006 and DNV 2.7-1:2013
3. Basic of Design
Lifting Point (n) n = 4
Number of Intermediate Link n1 = 2
Number of Master Link n2 = 1
Tare Mass (T) T = 4200 kg
Payload (P) P = 10500 kg
Rating or Maximum gross mass (R) = T+P R = 14700 kg
Standard acceleration of gravity (g) g = 9.8 m/s 2
Angle of sling leg from vertical (ß) ß = 45º
Material Padeye J IS G 3106 SM 490 YA
Yield Strength (C) = (Re) C = Re = 355 N/mm 2
Conclusion:
If R = 14,700 kg, find the minimum required working load limit (WLLmin)
WLLmin =19,200 kg
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Ma ster Link Assem b ly Dim en sion:
Select a master link assembly with a WLL of at least 19,200 kg
Master Link size minimum1-3/8”
Sl ing Leg Dim en sion:
WLLsl =3cos β
WLLmin =
o45cos3
19200 = 9,050 kg
Select a wire rope with a WLL of at least 9,050 kg
Wire rope size minimum 28 mm
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Sha c kle Dim ension:
WLLs =
3cos β
WLLmin =
o
45cos3
19200 = 9,050 kg
Select a shackle with a WLL of at least 9,050 kg.
Shackle size: 9.5 T (1-1/8”)
Shackle Information:
Shackle Type G-2130 S-2130
Working Load Limit WLLs = 9500 kg
Nominal Size Shackle Shackle 1-1/8”
Pin diameter B = 31.8 mm
Shackle Width A = 46 mm
Shackle Height C = 108 mm
- Pad eye hole diameter (max.) :DH = B + 6% B
: 31.8 + (0.06 x 31.8) = 34 mm
- Pad eye thickness (min.) :T = A x 75%
: 46 x 0.75 = 34 mm
Resulting Sling Force on the pad eyes: RSF =o
Cosn
xRxg
45)1(
3
=o
Cos
x x
453
8.9147003= 203731 N
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Pa d Eye Stre ng th:
Padeye Information:
Hole Diameter : DH = 33 mm
Padeye Radius : H = 65 mm
Check Plate Radius : R = 40 mm
Plate Thickness : t1 = 32 mm
Total Thickness : t2 = 44 mm
- Tear-out Stress
Ri =
112
3
DHxt xHxt
xRSF
Ri =x32332x65x32
3x203731
= 197 N/m m 2
Re
Ri=
355
197= 0.55 (maximum 0.85) OK
- Contact Stress
Ri = 23.7 x2DHxt
RSF
Ri = 23.7 x33x44
203731= 280 N/m m 2
Re
Ri=
355
280= 0.79 (maximum 0.85) OK
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