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  • BS MA 47:1977

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    Code of practice for ships\' cargo blocks

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  30-11-1977

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    Specification
    1. Scope
    2. References
    3. Definitions
    4. Factor of safety
    5. Permissible working stresses
    6. Materials
    7. Side and partition plates
    8. Fixed head fittings
    9. Shanked swivel head fittings
    10. Screw threads
    11. Heat treatment
    12. Axle pins
    13. Lubrication
    14. Sheaves
    15. Becket
    16. Locking nuts
    17. Proof load
    18. Examination after proof load
    19. Marking
    20. Certificate of test and examination
    Appendices
    A. Recommendations relating to contracts
    B. Proof load in relation to safe working load
    C. Single sheave blocks: marking of safe working load
         and use in the derrick rig
    D. Guidance for the ordering of blocks
    E. Particulars of screw threads for the shanks of head
         fittings
    F. Care and maintenance of ships' cargo blocks
    G. Formulae for round section eyes
    H. Head fittings
    Figures
    1. Ships' cargo blocks
    2. Shear pull-out and tensile stress in straps
    3. Position of reactions in crossheads
    4. Typical rigs using single sheave blocks
    5. Head fittings
    Tables
    1. Load transmitted by block sheaves
    2. Load on supporting straps (equal spans)
    3. Permissible tensile stress on shanks of head fittings
    4. Diameter in sheave grooves
    5. Diameter of sheaves
    6. Proof load in relation to safe working load
    7. Typical table of information that may be supplied
         with an enquiry or order
    8. Particulars of screw threads: ISO metric screw
         threads, coarse series with graded pitches

    Abstract - (Show below) - (Hide below)

    Steel blocks for use with wire rope in ships\' cargo derrick rigs. Design, construction and materials, safe working load, proof load, inspection, tests and certification. Recommendations for care and maintenance.

    Scope - (Show below) - (Hide below)

    This standard covers ships’ steel cargo blocks for use with wire rope and forming part of the cargo derrick rig, embracing the body, sheave(s), axle pin, head fittings and becket.

    Materials, workmanship, design particulars (screw threads, bearings, sheave diameters for given rope sizes, sheave grooves), permissible stresses, proof loading, inspection, marking and certificate of test and examination are specified.

    General Product Information - (Show below) - (Hide below)

    Committee MHE/3/-/6
    Development Note Supersedes 72/34747 DC and BS 408(1963) (08/2005) Reviewed and confirmed by BSI, December 2012. (11/2012)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS MA 48:1976 Code of practice for design and operation of ships\' derrick rigs

    Standards Referencing This Book - (Show below) - (Hide below)

    BS MA 48:1976 Code of practice for design and operation of ships\' derrick rigs
    BS 3100(1976) : AMD 5515 SPECIFICATION FOR STEEL CASTINGS FOR GENERAL ENGINEERING PURPOSES
    BS 1486-3(1949) : LATEST LIGHT-WEIGHT MINIATURE LUBRICATING NIPPLES
    BS 1486-1:1959 LUBRICATING NIPPLES - LUBRICATING NIPPLES AND ADAPTORS FOR USE ON MACHINERY AND VEHICLES
    BS 919-3:1968 SPECIFICATION FOR SCREW GAUGE LIMITS AND TOLERANCES - GAUGES FOR ISO METRIC SCREW THREADS
    BS 310:1972 SPECIFICATION FOR BLACKHEART MALLEABLE IRON CASTINGS
    BS 309:1972 SPECIFICATION FOR WHITEHEART MALLEABLE IRON CASTINGS
    BS 970-1(1972) : 1972
    BS 919-1:1960 SPECIFICATION FOR SCREW GAUGE LIMITS AND TOLERANCES - GAUGES FOR SCREW THREADS OF UNIFIED FORM
    BS 302(1968) : AMD 583 STRANDED STEEL WIRE ROPES
    BS 1486-2:1961 LUBRICATING NIPPLES - HEAVY DUTY LUBRICATING NIPPLES
    BS 3810-6:1973 GLOSSARY OF TERMS USED IN MATERIALS HANDLING - TERMS USED IN CONNECTION WITH PULLEY BLOCKS
    BS 2772-2(1977) : LATEST COLLIERY HAULAGE AND WINDING EQUIPMENT - WROUGHT STEEL
    BS 919-4:1964 SPECIFICATION FOR SCREW GAUGE LIMITS AND TOLERANCES - LIMITS OF SIZE FOR GAUGES FOR SCREW THREADS OF UNIFIED FORM DIAMETERS 1/4 IN AND LARGER
    BS 1486-4:1981 LUBRICATING NIPPLES - SPECIFICATION FOR HYDRAULIC GREASE NIPPLES
    BS 1700(1963) : LATEST MEMORANDUM ON SHIPS' DERRICK RIGS
    BS 2789(1973) : LATEST SPHEROIDAL GRAPHITE OR NODULAR GRAPHITE CAST IRON
    BS 3017:1958 SPECIFICATION FOR MILD STEEL FORGED RAMSHORN HOOKS
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