Digitally Signed 25-Nov-2014 Digitally Signed 25-Nov-2014
1. Abbreviations MCD MPT NBL NSF UNOLS 2. Purpose Maximum Capability Document Maximum Permissible Tension Nominal Breaking Load National Science Foundation University-National Oceanographic Laboratory System This document describes the general arrangement of the oceanographic winch turning block that serves the oceanographic winch storage winch level winds onboard the vessel. It establishes the load capacity of the block as a component of the aft overboarding system. This document sets the maximum permissible tension (MPT) as required by the UNOLS RVSS, Appendix B when the sheave is used to support over-the-side operations for science. 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. 2.1. Deployment Types This block will potentially be used for the following types of deployments: Towing Surface Towing Mid-Water Towing Deep Water Station Keeping Surface Station Keeping Mid-Water Station Keeping Deep Water Operation /N Notes See Reference 3.2.3, Section B.3.5 for descriptions of operations. 3. General 3.1. Description A turning block in the Aft Winch Room routes wire between the oceanographic level winds and slack wire compensator components of the aft overboarding system. Winch Turning Block MCD, Rev. - Page 2 of 7 Job No. 07096, 15 October 2014
3.2. Reference Documents 3.2.1. 46 CFR 189.35, Wet Weight Handling Gear. 3.2.2. Rope and Cable Safe Working Load Standards, University National Oceanographic Laboratory System (UNOLS), UNOLS Research Vessel Safety Standards (RVSS), Appendix A, March 2009. 3.2.3. Overboard Handling Systems Design Standards Criteria for the Design and Operations of Overboard Handling Systems, University National Oceanographic Laboratory System (UNOLS), UNOLS Research Vessel Safety Standards (RVSS), Appendix B, March 2009. 3.2.4. Deck Sheave DS-D1220 Dimensional Sketch, Rapp Hydema, Drawing No. RH313983, Rev. A, 20 August 2010. 3.2.5. Traction Winch System TRW-4000B + 2x RWS-2326/Spooling Device Principal Arrangement, Rapp Hydema, Drawing No. RH310356, Rev. B, 8 February 2008. 3.2.6. Overside Equipment Handling Arrangement, Marinette Marine Corp., Drawing No. 0650-714-01, Rev. D. 3.2.7. Factory Acceptance Test, Ocean System Final Report, Rapp Hydema, 28 November 2011. 4. Operational Requirements Maximum capabilities meet the following requirements: Item Maximum Capability Value Criteria Source Maximum Permissible Tension (MPT) 11,600 lbf 1 Reference 3.2.7 Wire Groove Size 0.680" or 9/16" Rapp-Hydema Wrap Angles (α) Minimum 175 Rapp-Hydema Maximum 180 Rapp-Hydema Other Sheave speed range {Vendor Supplied} Spec min is 60 m/min Notes: 1. The level wind is on the low tension side of the traction winch; therefore, it will not be subject to the breaking load of the wire and is not required to meet the requirements of Reference Error! Reference source not found.. Therefore, the MPT of the level wind will not limit the MPT of the system. Winch Turning Block MCD, Rev. - Page 3 of 7 Job No. 07096, 15 October 2014
5. Operational Figures 5.1. Load Geometry Wrap Angle α Winch Turning Block MCD, Rev. - Page 4 of 7 Job No. 07096, 15 October 2014
5.2. Vendor Drawing Winch Turning Block MCD, Rev. - Page 5 of 7 Job No. 07096, 15 October 2014
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R/V SIKULIAQ Maximum Capability Document Summary Oceanographic Winch Turning Block DS-D1220 Manufactured By: Rapp Hydema Reference Drawing Number: RH313983 Prepared By: The Glosten Associates & Rapp Hydema Company 6 5 4 3 2 1 D 171 ISO VIEW ( 1 : 15 ) D 91 262 ROOT Ø1220 C 175 175 175 175 75 850 Ø1250 1370 C B B 27 THRU 50 1 (10x) 75 75 775 775 75 1700 A REV ZONE DESCRIPTION DATE(d/m/y) APPROVED A * fixed, ready for production 20.08.2010 AXA Design A Weight 250 kg DECK SHEAVE Phone: (+47) 75 55 01 00 DS- D1220 Fax: (+47) 75 55 01 11 Scale Sheet E-mail: office@rapphydema.com 1:10 1 / 1 DIMENSIONAL SKETCH Drw number RH313983 6 5. 4 3 Material (for part) Status Preliminary Drawn by / Date(dd/mm/yy) Checked by / Date(dd/mm/yy) Partlist RHTTS 20.08.2010 2 1 Maximum Permissible Tension = 11,600 lbf Note 1 The storage drums are on the low tension side of the traction winch; therefore, they will not be subject to the breaking load of the wire. Therefore, the MPT will not limit overboarding operations. 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. Winch Turning Block MCD, Rev. - Page 7 of 7 Job No. 07096, 15 October 2014