CHINA CLASSIFICATION SOCIETY RULES FOR LIFTING APPLIANCES OF SHIPS AND OFFSHORE INSTALLATIONS 2007 Effective from April 1 2008 BeiJing CONTENTS CHAPTER 1 SURVEYS AND CERTIFICATION.........................................................................................1 1.1 APPLICATION.........................................................................................................................................1 1.2 DEFINITIONS..........................................................................................................................................1 1.3 PLANS AND DOCUMENTS...................................................................................................................2 1.4 CLASS NOTATIONS................................................................................................................................4 1.5 SURVEYS.................................................................................................................................................4 1.6 CERTIFICATION......................................................................................................................................9 CHAPTER 2 DERRICK SYSTEMS.............................................................................................................12 2.1 CALCULATING CONDITIONS AND LOADS....................................................................................12 2.2 SLEWING DERRICK AND UNION PURCHASE RIGS.....................................................................13 2.3 DERRICK BOOMS................................................................................................................................15 2.4 MAST AND DERRICK POST................................................................................................................17 CHAPTER 3 CRANES, LIFTS AND RAMPS.............................................................................................19 3.1 GENERAL PROVISIONS......................................................................................................................19 3.2 SHIPBOARD CRANES..........................................................................................................................19 3.3 OFFSHORE CRANES............................................................................................................................35 3.4 SUBMERSIBLE HANDLING SYSTEMS.............................................................................................37 3.5 HEAVY LIFT CRANES..........................................................................................................................38 3.6 CRANE PEDESTALS.............................................................................................................................38 3.7 CARGO AND VEHICLE LIFTS............................................................................................................39 3.8 VEHICLE RAMPS..................................................................................................................................47 3.9 PASSENGER AND CREW LIFTS.........................................................................................................50 3.10 STRENGTH OF SUPPORTING STRUCTURE OF CRANE PEDESTALS.........................................55 CHAPTER 4 MACHINERY, ELECTRICAL INSTALLATIONS AND CONTROL ENGINEERING SYSTEMS....................................................................................................60 4.1 GENERAL PROVISIONS......................................................................................................................60 4.2 CONTROLS AND SAFEGUARDS OF LIFTS FOR PASSENGERS AND CREW..............................60 4.3 CONTROLS AND SAFEGUARDS OF LIFTING APPLIANCES FOR CARGO HANDLING..........61 CHAPTER 5 FITTINGS, LOOSE GEAR AND ROPES.............................................................................64 5.1 GENERAL PROVISIONS......................................................................................................................64 5.2 FITTINGS...............................................................................................................................................64 5.3 LOOSE GEAR........................................................................................................................................65 5.4 ROPES....................................................................................................................................................65 CHAPTER 6 MATERIALS AND WELDING.............................................................................................67 6.1 GENERAL PROVISIONS......................................................................................................................67 6.2 ROLLED STEELS..................................................................................................................................67 6.3 STEEL FORGINGS................................................................................................................................69 -- 6.4 STEEL CASTINGS.................................................................................................................................70 6.5 WELDING..............................................................................................................................................70 CHAPTER 7 TESTING..................................................................................................................................72 7.1 GENERAL PROVISIONS......................................................................................................................72 7.2 TESTING OF LOOSE GEAR................................................................................................................72 7.3 BREAKING TESTS OF ROPES............................................................................................................73 7.4 TESTING OF LIFTING APPLIANCES.................................................................................................74 7.5 RETESTING OF LIFTING APPLIANCES............................................................................................75 CHAPTER 8 MARKING...............................................................................................................................76 8.1 MARKING OF LOOSE GEAR..............................................................................................................76 8.2 MARKING OF LIFTING APPLIANCES..............................................................................................76 APPENDIX 1 CRITICAL STRESS FOR VARIOUS MEMBERS SUBJECTED TO COMPRESSION......................................................................................................................78 APPENDIX 2 DERRICK FITTINGS.............................................................................................................84 APPENDIX 3 REGISTER OF LIFTING APPLIANCES AND CARGO HANDLING GEAR................97 APPENDIX 4 CONDITIONS OF RATIFICATIONS OF ILO CONVENTIONS NO.32 AND NO.152 BY PORT STATE AUTHORITIES..............................................................108 -- CHAPTER 1　SURVEYS AND CERTIFICATION 1.1　APPLICATION 1.1.1　The Rules are applicable to the following lifting appliances used on board ships and offshore installations: (1) derrick rigs, including derrick cranes; (2) cranes; (3) submersible handling systems; (4) passenger and crew lifts; (5) cargo and vehicle lifts (where the certificate for lifting appliances is necessarily to be issued) and vehicle ramps (where the certificate for lifting appliances is necessarily to be issued). 1.1.2　Lifting appliances other than those described in 1.1.1 of this Chapter may be considered in accordance with the principles of the Rules. 1.1.3　The materials and the welding for lifting appliances are to comply with the applicable requirements of CCS Rules for Materials and Welding. 1.1.4　The relevant standards acceptable to CCS may be used as the equivalent to the requirements of the Rules, provided all the forces resulting from the intended mode of operation for the lifting appliances are taken into account. 1.1.5　The standards recognized by CCS for fittings and loose gear will in general be accepted as the equivalent to the requirements of the Rules. 1.1.6　Alternative arrangements or fittings and loose gear which are equivalent to those required by the Rules may be used. 1.1.7　For novel lifting appliances or lifting appliances with special functions, additional plans and documents are to be submitted in addition to those normally required. 1.2　DEFINITIONS 1.2.1　For the purpose of the Rules: (1) Lifting appliances mean derrick rigs, derrick cranes, cranes, lifts and ramps installed on board ships or offshore installations, as appropriate, for the purpose of handling or transferring cargo, equipment, goods, or persons, etc. (2) Light derricks mean the derricks or derrick cranes of which the safe working load is equal to or less than 98 kN. (3) Heavy derricks mean the derricks or derrick cranes of which the safe working load is more than 98 kN. (4) Derrick cranes mean the derricks as rigged with twin span tackles and may be handled under loaded condition by one operator to complete hoisting, slewing and lifting operations. (5) Loose gear means the gear which is not permanently attached to the lifting appliances, such as chains, triangle eyeplates, hooks, blocks, shackles, swivels, sockets, preventer guys with patent clips and rigging screws, etc. Lifting beams, spreaders, frames and similar items of equipment are also considered as loose gear. (6) Fittings mean fittings which are permanently attached to the derrick booms, masts or derrick posts, decks, superstructures or other structures such as eyeplates, derrick heel assemblies, gooseneck bearings including gooseneck pipes, derrick bands and built-in sheaves, etc. (7) Safe Working Load (SWL): ① Safe working load of a lifting appliance means the maximum static load the appliance is certified to be capable of sustaining whilst correctly rigged under the design operation. ② Safe working load of loose gear means the maximum load for which the gear has been designed and tested. This load is not to be less than the maximum load to which the gear will be subjected when the lifting appliance is operating at its SWL. -- (8) Standard service conditions are the conditions under which the SWL of a lifting appliance is ascertained. It is to include all of the following conditions: ① the angle of heel not exceeding 5° and a trim of 2° during the operation of the appliance; ② the appliance being operated in harbour; ③ the appliance being operated at a wind speed not exceeding 20 m/s and a corresponding wind pressure not exceeding 250 Pa; ④ the motion of lifting load being free from any external conditions; ⑤ the nature of the lifting operations in terms of their frequency and dynamic characteristics being compatible with the load of factor permitted in the Rules for the appliances concerned. (9) Specified service conditions mean the operating conditions for the design of an appliance, which are more onerous than those as described in the standard service condition in virtue of any of the following operational and environmental conditions being applicable: ① the angle of heel and/or trim of a ship exceeding those as specified in the standard service conditions; ② the appliance being operated in an unsheltered area; ③ the appliance being operated at a wind speed exceeding 20 m/s and a corresponding wind pressure exceeding 250 Pa; ④ the load not being at rest at the time when the appliance commences the lift; ⑤ the motion of lifting load not being free from the external constraints; ⑥ the nature of the lifting operation in terms of their frequency and dynamic characteristics not being compatible with the factor load permitted in the Rules for the appliances concerned. (10) Factor load means the loads (excluding wind load) to be considered in designing a lifting appliance, expressed as follows: factor load = live load × duty factor × dynamic factor (11) Live load is the sum of the safe working load (SWL) of an appliance and the static weight of any component of the appliance which is directly connected to, and undergoes the same motion as, the safe working load during the lifting operation. (12) Duty factor is a factor which makes allowances for the frequency and state of loading for which a lifting appliance is to be considered in design. (13) Dynamic factor is a factor which takes account of all the dynamic effects of the appliance arising from its lifting operation, and by which the live load is multiplied to represent the load for all dynamic effects on the system. (14) Dead load is the self-weight of any component of the lifting appliance which is not included in the live load. (15) Design stress is the maximum stress permitted in the Rules to which any component part of a lifting appliance may be subjected when the appliance is lifting its safe working load (SWL), that is, when the appliance is subjected to the factor load plus the specified lateral and wind loads. (16) General examination is to take the form of a visual inspection of the lifting appliances, which is to be supported by other means as necessary and carried out so far as practical to achieve a sound view on components in question. For this purpose, components or parts are to be dismantled for more thorough examination where considered necessary. (17) External examination is to take the form of a visual inspection of the lifting appliances by checking for deformation or other defects of components, such as chafe or excessive wear and corrosion. 1.3　PLANS AND DOCUMENTS 1.3.1　In the case of derrick rigs the following plans and documents are to be submitted for approval: (1) a rigging (including derrick cranes) plan, indicating the layout of the light derricks, heavy derricks and union purchase and the portions of individual items of loose gear; (2) force diagram of derrick rigs and in the case of union purchase rigs also the working range and specified data; (3) scantling plans of masts, derrick posts and stays where fitted; (4) scantling plans of derrick booms including their head and heel fittings; -- (5) details of gooseneck bearing bracket, gooseneck pins, span eyeplates, guy eyeplates and similar fittings; where recognized international standards or national standards appropriate are in use, only a list of fittings indicating material, safe working loads and the standards with which the fittings have been manufactured in compliance is to be submitted; (6) the material specification for steels including grades of steel, welding consumable and type and size of welds to be used in the mast, derrick boom and associated fittings as shown in (3), (4) and (5) above; (7) strength and/or stability calculations for masts, derrick posts and stays (if fitted) and derrick booms. 1.3.2　The following plans and documents for derrick rigs are to be submitted for information: (1) a list of blocks, chains, shackles, hooks, swivels and other items of loose gear indicating material, safe working load, proof load and the standards under which they have been manufactured; (2) a list of wire and fibre ropes indicating size, construction, finish and certified breaking loads, normal tensile strength being indicated for wire ropes. 1.3.3　In the case of crane systems, the following plans and documents are to be submitted for approval: (1) general arrangement of crane, including specification of principal operational parameters; (2) force analysis for the crane system; (3) the layout of lifting, luffing, slewing and travelling mechanisms, including the arrangement and functions of overload protection, overmoment protection and various limit switches; (4) strength calculations of main items, clearly indicating the design basis, operating criteria, rated capacity, weights and centres of gravity of the crane parts and relevant national standards; (5) stability calculation of crane, as applicable; (6) structural plans of all main components comprising the crane including jib, tower, platform, gantry, logies, slewing ring, pedestals, rails, stowage arrangement, indicating their structures, scantlings and grades of steel, welding consumable and type and size of welds. 1.3.4　The following plans and documents for crane systems are to be submitted for information: (1) details of sheaves, axles, pivot pins, wheels, spreader beams, slewing ring, slewing ring bolts and similar items and the specification of the grade of steel to be used; (2) details of blocks, hooks, swivels, lifting beams, spreaders, frames and other items of loose gear, indicating material, safe working load (SWL), proof load and the standard to which they have been manufactured; (3) the size, construction, finish and certified breaking loads of and normal tensile strength for wire ropes to be used. 1.3.5　In the case of lifts and ramps, the following plans and documents are to be submitted for approval: (1) design specifications, including materials to be used; (2) all main structural plans; (3) details of sheaves and sheave supports; (4) calculation clearly indicating the ratings, vehicle loads, wheel centres, tyre prints, working range and angles, weights and centres of gravity of component parts; (5) reeling arrangements; (6) the size, construction, finish and certified breaking loads of wire ropes and chains; (7) typical layout, including the details of lift car construction and guide rails, as applicable; (8) typical entrances, as applicable; (9) landing door fire test specification in the lift trunk, as applicable; (10) arrangement and details of the lift trunk including safety devices, as applicable. 1.3.6　The following plans and documents with respect to machinery, electrical and control systems are to be submitted for approval: (1) general arrangement of the control cabinet(s) and/or control station; (2) arrangement of power switchboard and its circuit diagrams; (3) diagrams of electrical circuit system indicating the specifications of equipment and cables, grade of insulation, rated current, types of various electric protections and their rated capacity and manufacturers; (4) short circuit current calculations for the bus-bar of the main and auxiliary switchboards and the output ends of transformers; -- (5) schematic diagrams of control circuits, interlocks and alarm system, including hydraulic, pneumatic and electric power; (6) details of safety devices, including securing and latching arrangement; (7) particulars of hydraulic rams and operating systems, if fitted. 1.3.7　The following plans and documents for machinery, electrical and control systems are to be submitted for information: (1) specifications for the operation and application; (2) general arrangement of motor room including their power units and specifications; (3) general arrangement of hoisting, luffing, slewing and travelling machanisms together with the technical instruction of these components. 1.3.8　The strengthening plans for connection of the lifting appliance to hull structure are to be submitted for approval. 1.4　CLASS NOTATIONS 1.4.1　Upon satisfactory completion of all tests and surveys of the lifting appliances for classification purposes and issue of all the appropriate test and survey certificates and the Register of Lifting Appliances and Cargo Handling Gear in accordance with the Rules, the Surveyor is to recommended the Headquarters of CCS to assign the class notation “Lifting Appliance” and enter this in the Interim Classification Certificate for Hull. 1.4.2　The Surveyor is to report the survey in a form of survey report (Form CG) to the Headquarters of CCS, together with copies of all issued certificates and documents. 1.4.3　The class notation will be formally assigned and entered in the Classification Certificate for Hull and in related documents by CCS after approval. 1.5　SURVEYS 1.5.1　General requirements 1.5.1.1　The lifting appliances are to be subject to an initial survey before being taken into use. Periodical tests and surveys are to be carried out after the lifting appliances being taken into use. 1.5.1.2　All loose gear prior to initial use for the lifting appliances, as well as the replaced or repaired components which affect the strength when in use, are to be proof tested and thoroughly examined. 1.5.1.3　Where a major accident occurs or a major defect is found, and the components to be replaced or repaired affect the strength, the master or the owner is to report to CCS so that the related lifting appliances can be surveyed in time. 1.5.1.4　The testing, proof test, survey and examination as stated in this Chapter are to be carried out in accordance with CCS rules or equivalent provisions recognized by CCS. 1.5.1.5　The loose gear and wire ropes, other than those having been satisfactorily examined within the last three months, are to be inspected by the responsible persons onboard the ship before each use. Ropes with broken wires are to be inspected at least once a month. 1.5.1.6　Types of survey for lifting appliances are as follows: (1) initial survey; (2) annual survey; (3) renewal survey (i.e. quadrennial thorough survey); (4) damage and repair surveys; (5) postponement survey. 1.5.1.7　The above-mentioned surveys are to be carried out in accordance with the requirements of this Section. 1.5.1.8　Other requirements -- (1) Where the lifting appliances are laid up or repaired for more than 12 months, an inspection is to be carried out before they are re-taken into use. The extent of the test and examination is to be determined depending on the types of survey to be carried out in the laid-up or repair period. For example, if the renewal survey and load test are due, the testing and survey are to be completed and the certificate is to be issued accordingly, and the new period of the renewal survey is to start from the date of completion of such testing and survey. (2) In view of the attitude that some National Authorities adopt with respect to the competence and independence of the person carrying out the survey, such as the ship’s officer, it is recommended that only the CCS Surveyor carry out the survey and issue certificates if delays and inconvenience to the owner are to be avoided. (3) Other surveys not previously specified, if requested by the owner, will be specially considered by CCS, but the separate instructions are to be supplied by the owner. (4) Any item such as a mast or crane pedestal, which is permanently fitted to a ship’s structure and which is designed to support a lifting appliance, does constitute part of the classed ship and is to comply with the appropriate classification requirements, even where the lifting appliance itself is not classed or certified by CCS. 1.5.2　Initial surveys 1.5.2.1　An initial survey is to consist of: (1) examining plans and documents to be submitted by the applicant in triplicate for approval and information as required by 1.3, except for the manufactures having been approved by CCS; (2) checking the approved design drawings and technical documents of the lifting appliance; (3) examining that the arrangement, components, scantlings, devices, materials, welding and workmanship of the lifting appliance are to comply with the approved plans and documents; (4) examining the fittings and loose gear of the lifting appliance one by one together with their certificates and checking the marks; (5) thoroughly examining the lifting appliance during installation and testing to be carried out after installation in accordance with Chapter 6 so as to confirm that all equipment operates effectively and safely, and that any cutouts, controls and similar devices function correctly. After testing, the installation, including the supporting structure, is to be examined to ensure that no deformation or distortion has occurred. Works testing of cranes cannot be accepted as an alternative to onboard testing. 1.5.2.2　After a satisfactory initial survey, the related certificates as specified in 1.6 are to be issued, and the Register of Lifting Appliances and Cargo Handling Gear is to be endorsed. 1.5.2.3　Initial surveys of existing installations on board ships may be carried out in accordance with the following requirements: (1) The arrangements, scantlings, calculations, instructions and relevant information of the installation are to be submitted to CCS for examination. (2) All loose gear for the installation is to be examined to verify that the item is individually marked and certified. Where certificates are missing, items are to be proof tested and remarked. (3) A thorough survey of the installation and supporting structure is to be carried out equivalent to a renewal survey, and load testing is to be carried out as required by Chapter 6. (4) After a satisfactory survey, the related certificates as specified in 1.6 are to be issued, and the Register of Lifting Appliances and Cargo Handling Gear is to be endorsed. 1.5.2.4　The lifting appliances on board the ships classed with one IACS member, when required for the transfer of class to CCS, are to be surveyed and certified as follows: (1) Where an existing ship is at the time of a renewal survey, such testing and survey are to be carried out in accordance with the requirements for renewal surveys of this Chapter. After a satisfactory survey, the testing and survey certificates are to be issued, and a new Register of Lifting Appliances and Cargo Handling Gear is to be endorsed for the renewal survey. (2) Where an existing ship is at the time of an annual survey, such testing and survey are to be carried out in accordance with the requirements for annual surveys of this Chapter. After a satisfactory survey, a new Register of Lifting Appliances and Cargo Handling Gear is to be issued and endorsed for the annual survey, and the various testing and survey certificates of the existing ship are to be attached to the new Register. (3) The register book on board an existing ship as required by a certain port State authority may also be endorsed if so requested by the owner and after a satisfactory survey, provided that the requirements of the flag State are complied with. -- 1.5.2.5　The lifting appliances on board the ships classed with non-IACS members are, when CCS class is requested, generally to be surveyed in accordance with 1.5.2.3. 1.5.2.6　The lifting appliances intended for classification, which are found to comply with the above- mentioned requirements upon an initial survey, will be assigned the notation “Lifting Appliance”. For the purpose of maintenance of classification, the owners are to make application in accordance with 1.5 for the periodical surveys and the issue of certificates carried out by CCS Surveyors. 1.5.3　Annual surveys 1.5.3.1　An annual survey of the following items is to be carried out at intervals not exceeding 12 months after the initial survey or the renewal survey: (1) The derrick booms together with fittings attached to the booms, masts or derrick posts, and deck are to be externally examined as detailed in Table 1.5.3.1-a; (2) The loose gear is to be thoroughly examined as detailed in Table 1.5.3.1-a; (3) The wire ropes are to be externally examined as detailed in Table 1.5.3.1-a; (4) The winches, cranes, cargo lifts and vehicle ramps are to be thoroughly examined as detailed in Table 1.5.3.1-b. Items and Description for Survey of Derrick Systems Table 1.5.3.1-a No. Item Derrick systems (1) Examine lugs, etc., at derrick head and mast head. (2) Examine goosenecks and heel pins for deformation, wear, scoring or other 1 Derrick boom and mast fittings defects. (3) Examine independent heel block anchorages 2 Fittings on deck Examine deck eyeplates, wire rope stoppers, etc. (1) Examine for corrosion (where this is suspected, paint to be removed as necessary). Special attention is to be paid to the part of the boom which comes into contact with the crutch or housing. If considered necessary, thickness is to be checked. 3 Derrick booms and masts (2) Examine for scars or dents and check that boom is not bent (where this is suspected, to be removed for measurement). (3) Ensure that the head and heel fittings are in good working order. Where considered necessary, boom is to be manoeuvred through all its working positions (1) Blocks to be examined. Particular attention is to be paid to sheave rotation, efficient lubrication and verification that there is no sign of excessive wear on Blocks the pin or scoring of the rope groove. If considered necessary, to be stripped 4 (including guy blocks) down. (2) Verify that blocks are of the appropriate safe working load for the position in which they are rigged (1) Examine and check for wear, deformation or other defects. Items are to be Shackles sufficiently free from paint, grease, scale, etc., to enable a proper examination ( including guy shackles), 5 to be made. links, rings, hooks, triangle (2) Verify that items are of the appropriate safe working load for the position in plates, etc. which they are rigged Examine wire ropes, with particular attention to broken wires at ferrule 6 Wire ropes connections or corroded wires Examine the chain which is to be sufficiently free from paint, grease, scale, etc., 7 Span chains to enable a satisfactory examination to be made. Check for deformation, wear or other defects (1) Where certificates for the repaired or renewed item are not available, the derrick is to be re-tested. 8 Re-test (2) Items to be load tested if repairs have been carried out which affect the strength -- Items and Description for Survey of Cranes, Lifts and Ramps Table 1.5.3.1-b No. Item Cranes, lifts and ramps 1 Arrangement Check reeving arrangement and hoisting block assembly as shown in Cargo Gear Arrangement Plan or manufacturer’s manual (1) Determine that the sheaves are free from cracks. Where the design is such as to prevent this examination it may be necessary to dismantle the item. (2) Examine rope groove for scoring. (3) Ensure that all lubrication arrangements are in working order. Fixed sheaves, blocks, 2 (4) Check anchorage of fixed axle pins. axle pins and housings (5) Check for free rotation of sheave on axle pin. (6) Check for excessive wear of axle pin and sheave bush, which may be dismantled where necessary. (7) Check condition of housing and separation plates 3 Jib heel pins, ramp hinges Check lubrication and ensure that there is no detrimental wear (1) Check lubrication, ensure tightness of bolts and check that there is no detrimental wear or excessive movement in the ring. (2) Particular attention is to be paid for signs of wear in the inner and outer rings and for 4 Slewing rings signs of wear in the raceways. (3) Additional inspections are to be carried out where these are specified by the crane or slew ring manufacturer (1) Examine entire length of rope. (2) Check for broken, worn or corroded wires. The rope is to be replaced if the number of broken, worn or corroded wires exceeds the limit given in 1.5.5.2(3) 5 Wire ropes (3) Examine terminal fittings, splices, etc., with particular attention to broken wires at ferrule connections. Any serving on splices is to be removed for the examination. (4) Before re-rigging ensure that the wire rope has been thoroughly lubricated (1) Check all bolts for tightness ensuring that where bolts have been replaced they are of the same type and quality as previously fitted. (2) Examine foundation bolts for signs of corrosion. (3) Check welds for cracks. 6 Structure (4) Examine structure for corrosion, removing paint and carrying out hammer tests as necessary. (5) Check jib, tower, support pedestal, gantry, ramps, rails, etc., for any sign of local indentation or unfairness (1) Thoroughly examine under proper conditions and check for cracks, deformation, wear, wastage or other defects. Items are to be free from paint, grease, scale, etc. Shackles, rings, hooks, 7 (2) If deformation of the shackle is found, and re-setting is carried out, the shackle is to be etc. suitably heat treated and re-tested. (3) If the shackle pin is renewed, the whole shackle is to be re-tested (1) Check for deformation, wear or other defects after removal of all paint, grease, etc. 8 Chains (2) Replaced links are to be of equivalent material and strength to original, and to be suitably heat treated and re-tested (1) Ensure that at least two turns of wire ropes are on the drum in all operating positions. (2) Check that the anchorages of all wire ropes are effective. 9 Rope drums (3) Check drum for cracks and for defects liable to damage the rope. (4) Check the effective working of any fleeting device fitted Hydraulic cylinders, (1) Check condition of hydraulic pipes. 10 winches, etc., and (2) Check pistons, pivot pins and bearings, etc., for excessive wear and deformation. attachments (3) Ensure that mounting brackets are free from deformation or damage (1) Examine main pivots and bearings to ensure that they operate satisfactorily and are free Main pivots, slewing 11 from excessive play, and that pivot pins do not have excessive wear or deformation. bearings, etc. (2) Ensure that lubrication arrangements are in working order (1) Where certificates for the repaired or renewed item are not available, the derrick is to be re-tested. (2) Loose gear is to be load tested if repairs have been carried out which affect the 12 Re-test strength. (3) It is essential that the crane is operated at each survey to verify safe and efficient working and to check hoisting, slewing, luffing and travel motions, and the operation of limit switches for over hoisting, over lowering, luffing, slewing and travel --