Construction of Wire Rope
Types of Lay and Strand Patterns
Seizing and Cutting
Eye and Socket Terminations
Wear and Damage
100
A bundle of wires twisted spirally around an axis.
What is a Strand.
100
Alternating large and small wire sizes in the outer layer.
What is Warrington wire.
100
The wire wrapping that binds the end of a wire rope near where it is cut.
What is Seizing.
100
The loose end of a rope.
What is the Dead end.
100
The outer stands separate and open.
What is Bird Caging.
200
A strand of metal wire or fiber that forms the center of a wire rope.
What is a Core.
200
All wires in the outermost layer are one size.
What is Seale wire.
200
Wire rope in which the strands are permanently formed into a helical shape during fabrication.
What is Preformed rope.
200
the load-lifting end of a rope.
What is the Live end.
200
A loss of diameter, often caused by corrosion, of more than __ is considered reason for removal of the rope from service.
What is 10%
300
A designation for the direction in which rope strands are twisted, described as if spiraling away from the observer.
What is the Lay.
300
Outer layer is typically a Seale pattern, used for increased wear resistance.
What is Combination Warrington-Seale wire.
300
Used to wind the other end of the seizing wire tightly around the rope, without overlapping, until the required seizing width is obtained.
What is a Seizing Bar.
300
A curved piece of metal that supports a loop of rope and protects it from sharp bends and abrasion.
What is Thimbles.
300
A shard bend that permanently deforms the lay of rope strands.
What is Kinking.
400
Strands that spiral to the right (clockwise).
What is Right-hand lay rope.
400
What the rope strands are laid around.
What is a Core.
400
Wire rope is cut using a rope shear, ______, or an oxyacetylene cutting torch.
What is an Abrasive cutoff wheel.
400
A socket that holds a loop of wire rope securely with a wedge that is tightened by tension on the rope.
What is a Wedge socket.
400
A rope can tolerate a small number of broken wires, but a rope must be removed from service if it has ______ number of wire breaks.
What is excessive.
500
Rope's tendency to rotate and untwist when under load.
What is Cabling.
500
Made of synthetic or natural fibers, either polypropylene or hemp/sisal, and is shaped to keep the strands in place and cushioned.
What is a Fiber Core.
500
An ______ is preferred because the heat also fuses the strands and strand wires together.
What is an Oxyacetylene cutting torch.
500
A socket that uses molten zinc or resin to secure the end of a wire rope inside the socket.
What is a Spelter socket.
500
______ ______ occurs when strands are forced apart and the core material is squeezed out from between the strands.
What is Core protrusion.
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