Stern A-Frame and Foundation
R/V SIKULIAQ
Maximum Capability Document
Manufactured by: Allied Systems Co.
Reference Drawing Number: # 76033
Prepared By: Allied Systems Co.
Igor V. Kormishkin 11/11/2015 (rev.C)
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1. Abbreviations
DLT Design Line Tension MCD Maximum Capability Document MPT Maximum Permissible Tension NBL Nominal Breaking Load NSF National Science Foundation UNOLS University-National Oceanographic Laboratory System
2. Purpose
This document sets the Maximum Permissible Tension (MPT) for the stern A-Frame installed onboard the vessel R/V Sikuliaq in accordance with the UNOLS Research Vessel Safety Standards (RVSS), Appendix B.
The tension member employed in the system is considered a component of the entire handling system and shall be used in accordance with Appendix A. The normal breaking load (NBL) of the tension member shall be less than the MPT with exceptions as outlined in RVSS Appendix B, Section B.4.
Associated MCDs for this component are:
Port Flag Bock Starboard Flag Block Underdeck Winches Additional wet gear rigging to be added as necessary 2.1. Deployment Types
This stern frame will potentially be used for the following types of deployments:
Towing – Surface Y Towing – Mid-Water Y Towing – Deep Water Y Station Keeping – Surface Y Station Keeping – Mid-Water Y Station Keeping – Deep Water Y
See Reference 3.2.3, Section B.3.5 for descriptions of operations
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3. General
3.1. Description and Limitations
This document is developed for the captain and crew of the R/V Sikuliaq to provide guidance on the acceptable loading conditions for the stern A-Frame. Due to the complex nature of oceangoing research and the highly variable loading conditions that may be encountered, a number of assumptions were made in order to develop this general purpose tool:
1. The maximum permissible tensions (MPT) are valid with the A-Frame resting in either of its two aft stop positions. Caution is advised for luffing operations near the limit of the padeye MPTs, as line tension held by winches located on the aft Main Deck can result in A-Frame overloading.
2. The geometry angles are defined per Section 4. All calculations were performed assuming zero initial heel and list. Any initial heel and list needs to be accounted for when monitoring the loaded cable angle into the water.
3. Vessel stability was not evaluated for any load cases; it is incumbent upon the captain and crew to insure that adequate stability exists in all loading conditions to conduct operations safely using the following permissible tensions.
4. The calculations were performed assuming relative motions and accelerations as defined below. It is incumbent on the ship’s captain to determine whether operations should continue based on ship’s motions in a seaway.
5. Two primary load cases are analyzed: station keeping and towing.
a. Station keeping load cases assume that the vertical or side angles into the water may be up to 30 degrees from the vertical. These assumptions account for the combined effects of ship and overboard package relative motions.
b. Towing load cases assume a vertical angle of 45 degrees and side angles of 30 degrees to port or starboard.
6. Since the A-Frame capabilities are inextricably linked to its structural condition, the Owner of the vessel is responsible for maintaining the A-Frame to the manufacturer’s specification.
7. The A-Frame’s hydraulic cylinders are the only mechanisms for resisting reaction vector forward components. Extra care is required when operating with cable leads forward of vertical because of this resultant forward vector. Should hydraulics fail during operations of this type, the A-Frame will rotate forward outboard till it hits the hard stops.
8. Maximum permissible tensions are calculated assuming that there is only a single load on the A-Frame at one time and the cable lead from the winch does not cross the vessel centerline. Portable winch load cases are symmetric about the centerline although only one side is shown.
9. The portable deck winches are assumed to have a levelwind lead 11" above the aft Main Deck. This is conservative for stern A-Frame loading and the assigned load case MPT is applicable to levelwind leads higher off the deck for that winch position.
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10. For intermediate deck winch positions, reference the load case winch position further aft of the position in question for the applicable MPT.
11. For all heavy operations such as towing or coring where the cable tension will approach the MPT of the Stern A-Frame, the A-Frame must be positioned at one of the two outboard stop positions. Primary supported by the cylinders and a Secondary by bearing against the structural hard stop.
3.2. Reference Documents
3.2.1. 46 CFR§189.35 “Wet Weight Handling Gear.”
3.2.2. UNOLS Research Vessel Safety Standards (RVSS), Appendix A: “Rope and Cable Safe Working Load Standards,” University National Oceanographic Laboratory System (UNOLS), March 2009.
3.2.3. UNOLS Research Vessel Safety Standards (RVSS), Appendix B: “Overboard Handling Systems Design Standards Criteria for the Design and Operations of Overboard Handling Systems,” University National Oceanographic Laboratory System (UNOLS), March 2009.
3.2.4. R/V Sikuliaq A-Frame Replacement Concept, The Glosten Associates, Inc., Drawing No. 185-SK-01, March 2014.
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4. Summary Capabilities and Index
Maximum capabilities meet the following requirements:
Table 1 Maximum Permissible Line Tensions When A-Frame in Primary Outboard Position
All Load Cases Port Flag Block with Station 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Keeping Load Port Flag Block with Towing 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Load Starboard Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Station Keeping Load Starboard Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Towing Load Deck Winch Forward of Fr. 94 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf with Station Keeping Load Deck Winch Forward of Fr. 94 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf with Towing Load Deck Winch Aft of Fr. 94 with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Station Keeping Load Deck Winch Aft of Fr. 94 with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Towing Load Worst Case Load with two leads N/A N/A to Wing pad eyes (P and S)
See Figure 57, Figure 58, and Figure 59 in Section 5.1 of this document for Angle, A-Frame Padeye, and Outboard Position definitions respectively.
A-Frame Secondary Outboard Position capabilities are listed in Table 2.
For load case details, please refer to Table 3 to find the specific load case page.
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Table 2 Maximum Permissible Line Tensions When A-Frame in Secondary Outboard Position
All Load Cases Port Flag Block with Station 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Keeping Load Port Flag Block with Towing 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Load Starboard Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Station Keeping Load Starboard Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Towing Load Deck Winch Forward of Fr. 94 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf with Station Keeping Load Deck Winch Forward of Fr. 94 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf with Towing Load Deck Winch Aft of Fr. 94 with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Station Keeping Load Deck Winch Aft of Fr. 94 with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Towing Load Worst Case Load with two leads N/A N/A to Wing pad eyes (P and S)
A-Frame speed rate for all positions ______1.5-2 deg/sec Approximate time to deploy from Inboard/Outboard and back (Primary) ______37-50 sec Approximate time to deploy from Inboard/Outboard and back (Secondary) ______71-96 sec
DLT=120,000 lbs (Breaking strength of the wire rope for cross beam) DLTw=20,000 lbs ( Breaking strength of the wire rope for wings)
MPT – Maximum line tension that results in the Safe Working Load of a component (UNOLS RVSS B.2.12).
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Table 3 Index to Load Case Details
Port Flag Block with Page 8 Page 10 Page 12
Station Keeping Load Port Flag Block with Page 9 Page 11 Page 13 Towing Load
Starboard Flag Block with Page 14 Page 16 Page 18 Page 20 Station Keeping Load
Starboard Flag Block with Page 15 Page 17 Page 19 Page 21 Towing Load
Deck Winch forward of Page 22 Page 24 Page 26 Fr. 94 with Station Keeping Load Deck Winch forward of
PRIMARY OutboardPRIMARY Position Page 23 Page 25 Page 27 Fr. 94 with Towing Load
Deck Winch aft of Fr. 94 Page 28 Page 30 Page 32 Page 34 with Station Keeping
Frame in Frame Load -
A Deck Winch aft of Fr. 94 Page 29 Page 31 Page 33 Page 35 with Towing Load
Port Flag Block with Page 36 Page 38 Page 40 Station Keeping Load
Port Flag Block with Page 37 Page 39 Page 41 Towing Load
Starboard Flag Block with Page 42 Page 44 Page 46 Page 48 oard Position oard Station Keeping Load b
Starboard Flag Block with Page 43 Page 45 Page 47 Page 49 Towing Load
Deck Winch forward of Page 50 Page 52 Page 54 Fr. 94 with Station Keeping Load
Deck Winch forward of Page 51 Page 53 Page 55 Fr. 94 with Towing Load
Deck Winch aft of Fr. 94 Page 56 Page 58 Page 60 Page 62 with Station Keeping Load
Frame in OutFrame SECONDARY - Deck Winch aft of Fr. 94 A Page 57 Page 59 Page 61 Page 63 with Towing Load
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A-Frame in Primary Outboard Position, Port Flag Block, Station Keeping on Centerline (CL) Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 SF to Yield Hydraulic capacity 30,000 lbf|
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 98 CL Padeye ° ° Wrap Angle (W) 66 - 116 Port Flag Block
Figure 1
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A-Frame in Primary Outboard Position, Port Flag Block, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity | 30,000 lbf |
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 98 CL Padeye ° ° Wrap Angle (W) 50 - 95 Port Flag Block
Figure 2
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A-Frame in Primary Outboard Position, Port Flag Block, Station Keeping on CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 94 CP Padeye ° ° Wrap Angle (W) 66 - 116 Port Flag Block
Figure 3
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A-Frame in Primary Outboard Position, Port Flag Block, Towing on CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 94 CP Padeye ° ° Wrap Angle (W) 50 - 95 Port Flag Block
Figure 4
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A-Frame in Primary Outboard Position, Port Flag Block, Station Keeping on LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 87 LP Padeye ° ° Wrap Angle (W) 57 - 101 Port Flag Block
Figure 5
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A-Frame in Primary Outboard Position, Port Flag Block, Towing on LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 87 LP Padeye ° ° Wrap Angle (W) 42 - 87 Port Flag Block
Figure 6
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A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 86 CL Padeye ° ° Wrap Angle (W) 64 - 114 Starboard Flag Block
Figure 7
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A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 86 CL Padeye ° ° Wrap Angle (W) 49 - 94 Starboard Flag Block
Figure 8
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A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 89 CS Padeye ° ° Wrap Angle (W) 64 - 114 Starboard Flag Block
Figure 9
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A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 89 Towing ° ° Lead-in Angle (A) 60 - 120 CS Padeye ° ° Wrap Angle (W) 49 - 94 Starboard Flag Block
Figure 10
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A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on FS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 94 FS Padeye ° ° Wrap Angle (W) 67 - 114 Starboard Flag Block
Figure 11
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A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on FS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 94 FS Padeye ° ° Wrap Angle (W) 59 - 97 Starboard Flag Block
Figure 12
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A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on (LS) Padeye.
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 95 LS Padeye ° ° Wrap Angle (W) 58 - 101 Starboard Flag Block
Figure 13
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A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on LS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 95 LS Padeye ° ° Wrap Angle (W) 43 - 88 Starboard Flag Block
Figure 14
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A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94 Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 90 - 106 CL Padeye ° ° Wrap Angle (W) 81 - 131 Portable Winch Forward of Frame 94
Figure 15
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A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 90 - 106 CL Padeye ° ° Wrap Angle (W) 66 - 111 Potable Winch Forward of Frame 94
Figure 16
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A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Station Keeping on CP/CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 85 - 102 CP/CS Padeye ° ° Wrap Angle (W) 81 - 131 Potable Winch Forward of Frame 94
Figure 17
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A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Towing on CP/CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 85 - 102 CP/CS Padeye ° ° Wrap Angle (W) 66 - 111 Portable Winch Forward of Frame 94
Figure 18
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A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Station Keeping on LP/LS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 75 - 93 LP/LS Padeye ° ° Wrap Angle (W) 74 - 117 Portable Winch Forward of Frame 94
Figure 19
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A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Towing on LP/LS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 75 - 93 LP/LS Padeye ° ° Wrap Angle (W) 59 - 104 Portable Winch Forward of Frame 94
Figure 20
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A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94 Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 64 - 90 CL Padeye ° ° Wrap Angle (W) 92 - 142 Portable Winch Aft of Frame 94
Figure 21
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A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 64 - 90 CL Padeye ° ° Wrap Angle (W) 77 - 122 Portable Winch Aft of Frame 94
Figure 22
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A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on CS/CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 71 - 98 CS/CP Padeye ° ° Wrap Angle (W) 92 - 142 Portable Winch Aft of Frame 94
Figure 23
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A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Towing on CS/CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 71 - 98 CS/CP Padeye ° ° Wrap Angle (W) 77 - 122 Portable Winch Aft of Frame 94
Figure 24
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A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on (FS) Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 86 - 111 FS/FP Padeye ° ° Wrap Angle (W) 98 - 145 Portable Winch Aft of Frame 94
Figure 25
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A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Towing on (FS) Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield
Hydraulic capacity 20,000 lbf ° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 86 - 111 FS/FP Padeye ° ° Wrap Angle (W) 83 - 128 Portable Winch Aft of Frame 94
Figure 26
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A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on LS/LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 86 - 115 LS/LP Padeye ° ° Wrap Angle (W) 83 - 126 Portable Winch Aft of Frame 94
Figure 27
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A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Towing on LS/LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 86 - 115 LS/LP Padeye ° ° Wrap Angle (W) 113 - 68 Portable Winch Aft of Frame 94
Figure 28
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A-Frame in Secondary Outboard Position, Port Flag Block Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 97 CL Padeye ° ° Wrap Angle (W) 46 - 106 Port Flag Block
Figure 29
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A-Frame in Secondary Outboard Position, Port Flag Block, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 97 CL Padeye ° ° Wrap Angle (W) 31 - 76 Port Flag Block
Figure 30
R/V Sikuliaq Page 37 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Port Flag Block, Station Keeping on CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 94 CP Padeye ° ° Wrap Angle (W) 46 - 106 Port Flag Block
Figure 31
R/V Sikuliaq Page 38 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Port Flag Block, Towing on CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 94 CP Padeye ° ° Wrap Angle (W) 31 - 76 Port Flag Block
Figure 32
R/V Sikuliaq Page 39 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Port Flag Block, Station Keeping on LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 87 LP Padeye ° ° Wrap Angle (W) 48 - 108 Port Flag Block
Figure 33
R/V Sikuliaq Page 40 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Port Flag Block, Towing on LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 87 LP Padeye ° ° Wrap Angle (W) 33 - 78 Port Flag Block
Figure 34
R/V Sikuliaq Page 41 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Starboard Flag Block Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 87 CL Padeye ° ° Wrap Angle (W) 50 - 110 Starboard Flag Block
Figure 35
R/V Sikuliaq Page 42 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Starboard Flag Block, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 87 CL Padeye ° ° Wrap Angle (W) 35 - 80 Starboard Flag Block
Figure 36
R/V Sikuliaq Page 43 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Starboard Flag Block, Station Keeping on CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 89 CS Padeye ° ° Wrap Angle (W) 50 - 110 Starboard Flag Block
Figure 37
R/V Sikuliaq Page 44 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Starboard Flag Block, Towing on CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 89 CS Padeye ° ° Wrap Angle (W) 35 - 80 Starboard Flag Block
Figure 38
R/V Sikuliaq Page 45 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Starboard Flag Block, Station Keeping on FS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 94 FS Padeye ° ° Wrap Angle (W) 53 - 113 Starboard Flag Block
Figure 39
R/V Sikuliaq Page 46 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Starboard Flag Block, Towing on FS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 19,800 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 94 FS Padeye ° ° Wrap Angle (W) 38 - 83 Starboard Flag Block
Figure 40
R/V Sikuliaq Page 47 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Starboard Flag Block, Station Keeping on LS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° Lead-in Angle (A) 94 LS Padeye ° ° Wrap Angle (W) 51 - 111 Starboard Flag Block
Figure 41
R/V Sikuliaq Page 48 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Starboard Flag Block, Towing on LS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° Lead-in Angle (A) 94 LS Padeye ° ° Wrap Angle (W) 36 - 81 Starboard Flag Block
Figure 42
R/V Sikuliaq Page 49 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94 Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 90 - 102 CL Padeye ° ° Wrap Angle (W) 50 - 110 Portable Winch Forward of Frame 94
Figure 43
R/V Sikuliaq Page 50 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 90 - 102 CL Padeye ° ° Wrap Angle (W) 35 - 80 Portable Winch Forward of Frame 94
Figure 44
R/V Sikuliaq Page 51 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Station Keeping on CP/CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 89 - 99 CP/CS Padeye ° ° Wrap Angle (W) 50 - 110 Portable Winch Forward of Frame 94
Figure 45
R/V Sikuliaq Page 52 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Towing on CP/CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,0000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 89 - 99 CP/CS Padeye ° ° Wrap Angle (W) 35 - 80 Portable Winch Forward of Frame 94
Figure 46
R/V Sikuliaq Page 53 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Station Keeping on LP/LS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 77 - 92 LP/LS Padeye ° ° Wrap Angle (W) 60 - 120 Portable Winch Forward of Frame 94
Figure 47
R/V Sikuliaq Page 54 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Towing on LP/LS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 77 - 92 LP/LS Padeye ° ° Wrap Angle (W) 45 - 90 Portable Winch Forward of Frame 94
Figure 48
R/V Sikuliaq Page 55 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94 Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 73 - 90 CL Padeye ° ° Wrap Angle (W) 50 - 110 Portable Winch Aft of Frame 94
This position might not be applicable due to interference with the A-Frame foot base!
Figure 49
R/V Sikuliaq Page 56 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 73 - 90 CL Padeye ° ° Wrap Angle (W) 38 - 80 Portable Winch Aft of Frame 94
This position might not be applicable due to interference with the A-Frame foot base!
Figure 50
R/V Sikuliaq Page 57 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on CS/CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 78 - 95 CS/CP Padeye ° ° Wrap Angle (W) 50 - 110 Portable Winch Aft of Frame 94
This position might not be applicable due to interference with the A-Frame foot base!
Figure 51
R/V Sikuliaq Page 58 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Towing on CS/CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 78 - 95 CS/CP Padeye ° ° Wrap Angle (W) 35 - 80 Portable Winch Aft of Frame 94
This position might not be applicable due to interference with the A-Frame foot base!
Figure 52
R/V Sikuliaq Page 59 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on FS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 88 - 104 FS/FP Padeye ° ° Wrap Angle (W) 60 - 120 Portable Winch Aft of Frame 94
Figure 53
R/V Sikuliaq Page 60 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Towing on FS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 16,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 88 - 104 FS/FP Padeye ° ° Wrap Angle (W) 49 - 90 Portable Winch Aft of Frame 94
Figure 54
R/V Sikuliaq Page 61 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on LS/LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Station Keeping ° Maximum Vertical Angle (V) 30 Station Keeping ° ° Lead-in Angle (A) 87 - 110 LS/LP Padeye ° ° Wrap Angle (W) 60 - 120 Portable Winch Aft of Frame 94
Figure 55
R/V Sikuliaq Page 62 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Towing on LS/LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
° Maximum Side Angle (S) 30 Towing ° Maximum Vertical Angle (V) 45 Towing ° ° Lead-in Angle (A) 87 - 110 LS/LP Padeye ° ° Wrap Angle (W) 49 - 90 Portable Winch Aft of Frame 94
Figure 56
R/V Sikuliaq Page 63 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
5. Operational Figures
5.1. Load Geometry
Figure 57: Geometry Angle Definitions
R/V Sikuliaq Page 64 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
Figure 58: A-Frame Stopped Position reference
Figure 59: A-Frame Padeye reference
R/V Sikuliaq Page 65 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
5.2. A-Frame Image
R/V Sikuliaq Page 66 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
Figure 68: A-Frame Picture
R/V Sikuliaq Page 67 of 68 ASC MCD – Stern A-Frame and Foundation, Rev.C Job No. 2339, Date of 11/11/15 77/15Issue
R/V SIKULIAQ
Maximum Capability Document Summary: A-Frame and Foundation Manufactured By: Allied Systems Co. Reference Drawing Number: #76033
Prepared By: I.V. Kormishkin
Maximum Permissible Tensions (MPTs)
Port Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Station Keeping Load in
Port Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Position
Towing Load Starboard Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Frame - Station Keeping Load PRIMARY A Starboard Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Outboard Towing Load
Port Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Station Keeping Load in
Port Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Position
Towing Load Starboard Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Frame - Station Keeping Load A
SECONDARY Starboard Flag Block with 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf Outboard Towing Load
This summary is provided for reference. It is the operator’s responsibility to understand the limits and assumptions as presented in the full Maximum Capability Document.
R/V Sikuliaq Page 68 of 68 ASC MCD – Stern A-Frame and Foundation, Rev. C Job No. 2339, Date of 11/11/15 77/15Issue