Steel Wire Rope

Construction of Steel Wire Rope

The design of a rope is determined by:

    The number and arrangement of wires in each strand
    The number and arrangement of strands in each rope
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Wire Rope Lays

Right Lay Clockwise
Left Lay Counter-Clockwise
Regular Lay Wires in strands are laid in the opposite direction of the strands and are parallel to the rope axis.
Lang Lay Wires are laid in the same direction as the strands of the rope, and in an angle to the rope axis.

Longer lengths of the individual wires are exposed, creating greater resistance to wear and improve flexibility.

Lang lay ropes should only be used where both rope ends are “fixed” and therefore, should not be used with an swivel type terminal.

Grades of Rope’s Wire

Grade 135 Kg/mm² Special grade to meet requirements of hoisting rope on traction elevator.
Grade 150/160 Kg/mm² Galvanised wire coated with zinc through hot dip process for protection against corrosion.
Grade 165 Kg/mm² Ungalvanised and drawn galvanized wire for wire rope of general purpose.
Grade 180 Kg/mm² Ungalvanised high tensile grade wires for general purpose wire ropes.
Grade 200 Kg/mm² Extra high tensile grade is used in the manufacture of wire rope for special application where ultimate breaking strength is required.
Grade 220 Kg/mm² Commonly used for guying purposes where flexibility is not important.

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