Wire Rope Flashcards
What is the proper way to measure rope diameter?
Take 3 measurements on a 6 strand rope
and 4 measurements on 8 strand rope
Crown to Crown
Lay Length
Distance measured along a wire rope in which a strand makes one complete revolution
What is the most common lay for Rotation Resistant Wire Rope?
Outer strands laid to the right and inner strands laid to the left
What are Category 1 removal criteria for wire rope?
Kinking, crushing, unstranding, bird caging, signs of core failure of steel core protrusion
Corrosion
Electrical damage
Improperly applied end connections
Corroded, cracked, bent or worn end connections
What is the Category 2 removal criteria for Running Rope?
6 randomly broken wires in one rope lay
3 broken wires in one strand of one rope lay
What is the Category 2 removal criteria for Rotation Resistant wire rope?
2 randomly broken wires in 6 rope diameters
4 randomly broken wires in 30 rope diameters
What is the Category 2 removal criteria for Standing rope?
2 broken wires in one rope lay
1 broken wire at an end connection
What are the 3 removal criteria in Category 3?
Rotation Resistant-core profusion or other distortion indication core failure
Prior electrical contact with a power line
Broken strand
What is the correct way to install wire rope from reel to drum?
Either from top to top or bottom to bottom
What are the 3 types of wire rope core?
Wire strand core
Fiber core
Independent wire rope core
Wire core has advantages over fiber core what are they?
Heat resistant
7 1/2% stronger
More resistant to crushing
Name the 5 parts of wire rope
Core
Strand
Center wire
Wire
Wire rope
Minimum amount of wraps on a drum during operation?
2
What is the safety factor of chain slings?
4 to 1
Remove chains from service when wear reaches what % of original diameter?
10%
