Rigging hareware wire rope cable assembly
1>What is the safety factor of wire rope sling?
The design safety factor of these slings is 5:1. This means that a force of 5 times the working load limit must be applied to the sling before it may fail. For example: the breaking strength of wire rope sling is up to 180000 lbs, and that of round synthetic sling is 700000 lbs.
2>How is lifting capacity calculated?
Crane Lifting Capacity Calculation
(r)(hC)/100, where r is the radius (distance along the ground to the load) and hC is lifting height times capacity. Capacity, in turn, is particular to each boom arm length and angle chosen.
3>What is safe working load of a rope?
To consider the above variables, we use an arbitrary number to reduce the actual load applied to the rope. This number is called the safe workload. The ratio of working load to tensile strength of wire rope is called safety margin.
4>What is the design factor of wire rope?
The design coefficient of wire rope strength refers to the ratio of the rated strength of wire rope to its working stress. If a particular rope has a nominal strength of 100000 lbs and operates at a working stress of 20000 lbs, the rope strength design factor is 5. Its working strength is one fifth or 20% of the rated strength.
5>How do you inspect a wire rope?
1-Use the "rag and visual inspection" method to check for external damage. Gently grasp the rope, use a rag or cotton cloth, and slowly move along the wire...
2-Measuring the rope diameter...
3-Visually inspect the inside of the wire rope for wear, corrosion, pitting and lubrication.
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