Maintain and Store Rigging and Hoisting Equipment Flashcards
How should slings and wire rope be stored?
Dry location off the ground
What should be done with a wire rope that has a kink in it?
Remove from the surface & tag it.
What should be done if there is a possibility of shock loading when using a wire rope sling?
Use oversized ropes.
What should be done with a broken wire in a wire rope sling?
Work broken wire back and forth until it breaks.
What must be done with a wire rope that has been subjected to bird caging?
Remove rope from service or remove damaged section.
Is it safe to replace a lost pin in a shackle with a high strength bolt?
No.
Is it safe to repair a slight tear in synthetic web slings?
No.
Wire rope slings need what care?
Regularly put a light oil to prevent oil corrosion.
A wire rope used for lifting must be replaced if:
there are six or more randomly distributed broken wires in one rope lay, or three or more broken wires in one strand in one rope lay.
Peening of a wire is:
When wire rope strikes against a structural part of the machine or beats against a roller or itself, the wires and strands are flattened and distorted and become brittle. This is called PEENING.
Scrubbing of a wire:
Displacement of wires and strands as a result of wire rope rubbing against ITSELF.
Fatigue fracture:
Wires that break
Corrosion
While difficult to evaluate, is more serious cause of wear than abrasion, signifies a lack of lubrication.
Bird caging caused by:
Sudden stops, rope being pulled through tight sheaves or winding on too small a drum.
Kinks are caused by:
Faulty handling
