English Braids Steelsafe Dyneema Lifting Ropes & Slings For Offshore & Subsea Lifting
Padeyes for Lifting
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Padeye An Aviation Machinist’s Mate connecting tiedown chains to padeyes on the flight deck of the aircraft carrier USS Dwight D. Eisenhower (CVN 69) A padeye is a device often found on boats that a line runs through, or provides an attachment point. It is a kind of fairlead and often is bolted or welded to the deck or hull of a boat. It is also used in oil and gas projects to assist in the pur- pose of lifting. 1 Detail It’s made of steel plate with radius at one side. lifting is done with the help of a D-shackle or sling, which fits into the hole of the padeye. There may be one or more circular plates (cheek plates) welded around the hole. 2 Designing The following check should be done for the design of padeyes and to keep the stress less than the allowable stresses: At the hole: 1. Bearing stress 2. Shear stress 3. Tensile stress 4. Hertz Bearing stress At the base 1. Shear stress 2. Tensile stress 3. Bending stress 4. Combined bending stress and tensile stress 5. Von-Mises stress [1] A spreadsheet is more often used for this purpose. 3 References [1] http://e-book.lib.sjtu.edu.cn/otc-2007/pdfs/otc19040. pdf 1
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Padeyes for lifting purposes
Transcript of Padeyes for Lifting
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Padeye
An Aviation Machinists Mate connecting tiedown chains topadeyes on the ight deck of the aircraft carrier USS DwightD. Eisenhower (CVN 69)
A padeye is a device often found on boats that a line runsthrough, or provides an attachment point. It is a kind offairlead and often is bolted or welded to the deck or hullof a boat.It is also used in oil and gas projects to assist in the pur-pose of lifting.
1 DetailIts made of steel plate with radius at one side. lifting isdone with the help of a D-shackle or sling, which ts intothe hole of the padeye. Theremay be one ormore circularplates (cheek plates) welded around the hole.
2 DesigningThe following check should be done for the design ofpadeyes and to keep the stress less than the allowablestresses:At the hole:1. Bearing stress2. Shear stress3. Tensile stress4. Hertz Bearing stressAt the base1. Shear stress2. Tensile stress
3. Bending stress4. Combined bending stress and tensile stress5. Von-Mises stress[1]
A spreadsheet is more often used for this purpose.
3 References[1] http://e-book.lib.sjtu.edu.cn/otc-2007/pdfs/otc19040.
pdf
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2 4 TEXT AND IMAGE SOURCES, CONTRIBUTORS, AND LICENSES
4 Text and image sources, contributors, and licenses4.1 Text
Padeye Source: http://en.wikipedia.org/wiki/Padeye?oldid=643234534 Contributors: Jaiprakashsingh, XLerate, Malcolma, SmackBot,Markw99, Mshkc, Addbot, Guoguo12, Yobot, RockfangBot, Erik9bot, Vvnair 1978, BattyBot, DoctorKubla, Cxbishop and Anonymous:4
4.2 Images File:Question_book-new.svg Source: http://upload.wikimedia.org/wikipedia/en/9/99/Question_book-new.svg License: Cc-by-sa-3.0
Contributors:Created from scratch in Adobe Illustrator. Based on Image:Question book.png created by User:Equazcion Original artist:Tkgd2007
File:US_Navy_100105-N-6604E-007_Aviation_Machinist{}s_Mate_Airman_John_Wagner_connects_a_tiedown_chain_to_a_padeye_on_the_flight_deck_of_the_aircraft_carrier_USS_Dwight_D._Eisenhower_(CVN_69).jpg Source:http://upload.wikimedia.org/wikipedia/commons/9/95/US_Navy_100105-N-6604E-007_Aviation_Machinist%27s_Mate_Airman_John_Wagner_connects_a_tiedown_chain_to_a_padeye_on_the_flight_deck_of_the_aircraft_carrier_USS_Dwight_D._Eisenhower_%28CVN_69%29.jpg License: Public domain Contributors:This Image was released by the United States Navy with the ID 100105-N-6604E-007 (next).This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing for more information.Original artist: U.S. Navy photo by Mass Communication Specialist 3rd Class Bradley Evans
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DetailDesigningReferencesText and image sources, contributors, and licensesTextImagesContent license
