16 July 2016

DECK CRANES-TESTING, EXAMINATION AND CERTIFICATION-ETO

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Deck cranes

Testing, examination and certification

          After a crane has been installed on board and before it is put into service, and subsequently at least every 5 years, it shall be examined and tested by a competent person.

          Safe working load,

          SWL Test load Up to 20 tonnes 1.25 x SWL

           From 20 to 50 tonnes SWL + 5 tonnes

          Above 50 tonnes 1.1 x SWL

          crane accessories as shackles, chains, hooks, swivels and sheaves, etc. shall be tested and certified in accordance with rules

          The load-testing of a new crane shall always be carried out by means of loose weights. These shall be hoisted, lowered and swung at full speed, and the crane arm radius shall be varied. Braking of the above-mentioned movements shall be tested. The test shall comprise all crane movements that might occur in practice

          If loose weights cannot be used, a spring weight or a hydraulic jack shall be used instead. Several tests shall then be carried out, with the crane turned in different directions and at different boom angles. If a spring weight or a hydraulic weight is used, it shall be reliable and accurate.

          If, owing to insufficient pump pressure, it is impossible to hoist overload by means of hydraulic cranes, it is sufficient to hoist the greatest possible load. 

          Before and after the load test, the crane with accessories shall be thoroughly examined by a competent person. Dismantling may be required.

Test loads for crane accessories (fixed and loose):

           Component Safe working load Test loads   (SWL1):

           Chain, ring, Up to and including:  25 tonnes 2 x SWL

           hook, shackle,   30 tonnes   55 tonnes

           swivel, multiple   35 tonnes   65 tonnes

           Block, etc.     40 tonnes   70 tonnes   
                            45 tonnes   75 tonnes   
                              50 tonnes   85 tonnes  
                             180 tonnes 240 tonnes  

           Above180 tonnes 1.33 x SWL

           Single sheave block2   4 x SWL5

           Single sheave block with becket2   6 x SWL5

          Steel wire rope3   Breaking load Yoke or similar4   2.0 x SWL1For multiple sheave blocks, safe working load (S.W.L.) equal to resultant load in the heat fitting is permitted. 2For single sheave block with or without becket, the test load may be reduced in accordance with the above table when the resultant load in the head fitting exceeds 25 tonnes. 3Every length and dimension produced shall be tested. If there is no possibility of testing a complete piece, threads or parts may be tested till breakage and the strength be calculated. 4Yokes and similar with a safe working load (S.W.L.) of more than 20 tonnes, may be tested together with the cargo handling gear. 5S.W.L. = the maximum permitted load in the steel rope when the sheave is used as single loading block without becket.   
  
          Single sheave block   4 x SWL

          Single sheave block with becket    6 x SWL

          Steel wire rope   =   Breaking load

          Yoke or similar     2.0 x SWL

          1.  For multiple sheave blocks, safe working load (S.W.L.) equal to resultant load in the heat fitting is permitted.

          2.  For single sheave block with or without becket, the test load may be reduced in accordance with the above table when the resultant load in the head fitting exceeds 25 tonnes.

          3.  Every length and dimension produced shall be tested. If there is no possibility of testing a complete piece, threads or parts may be tested till breakage and the strength be calculated.

           4.  Yokes and similar with a safe working load (S.W.L.) of more than 20 tonnes, may be tested together with the cargo handling gear.

          5.  S.W.L. = the maximum permitted load in the steel rope when the sheave is used as single loading block without becket.    

Marking

 Cranes:
          Cranes shall be marked with crane number and maximum permitted safe working load (S.W.L.). Cranes with a variable/adjustable boom shall be marked with maximum permitted safe working load at two or more boom positions, including extreme boom positions.

  Blocks:
          Safe working load (S.W.L.) for a single sheave block is equal to the wire load in (i.e. half the force on the suspension link) when the block is used as a single loading block. For a single sheave block with beckets, S.W.L. is also equal to the wire load, which in this case is one third of the force on the suspension link. In both cases the block shall be marked with S.W.L. = the wire load as single loading block without Becket.

          For a multiple sheave block, S.W.L. is equal to the force on the suspension link, and equal to the S.W.L. with which the block shall be marked.In addition, blocks shall be marked with an identification number or mark, corresponding to the identification number or mark in the Certificate.

  Permanent crane accessories:
          Loose parts such as shackles, swivels, etc. shall be marked with the maximum permitted safe working load, and an identification number corresponding to the identification number in the Certificate.

 Hoisting gear:

          Hoisting gear shall be marked with maximum permitted safe working load (S.W.L.) in numbers or letters, and with an identification number corresponding to the identification number in the Certificate. This marking shall be done on the gear itself, or on a plate or ring made of a lasting material and securely fastened to the gear. Wire slings shall be marked with a label giving S.W.L. between 0° for single slings and 90° spread for other slings. Alternatively it is accepted that information on this is posted in readily visible places. The slings shall be easily identified by means of the posted information.


"At sea, I learned how little a person needs, not how much."— Robin Lee Graham, Sailor

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