Steel Wire Ropes Flashcards
What is the purpose of Steel Wire Ropes?
Steel wire ropes are used where Greater Strength is required and where stretching would have an adverse effect on the system.
What are the three common types of Steel Wire Ropes?
Different Types of Steel Wire Ropes;
- Flexible steel wire rope (FSWR)
- Galvanized steel wire rope (GSWR)
- Norselay (PVC Coated)
How are Steel Wire Ropes sized?
As with fibre ropes, all wire ropes are sized by diameter in millimeters.
What is the Safe Working Load of a Steel Wire Rope if the Breaking Strain is 12 tonnes?
The SWL of a rope is calculated as 1/6 of the Breaking Strain (BS).
If the BS is 6 tonnes then the SWL will be 1 tonne.
Therefore the answer would be 2 tonnes.
What inspections are required on registered Steel Wire Ropes?
Inspections on Steel Wire Ropes
- Pre-Use Inspections
- After-Use Inspections
- 6 Monthly Inspections
When conducting Pre-Use checks on any Steel Wire Rope, what areas should be scrutinised?
Pre-Use Inspection Checks;
Internal Wear;
- Polished internal strands.
- Reduced diameter.
External Wear;
- Polished strands.
- Flattened strands.
- Broken wires
i. If more than 10% of wires in a strand are broken, over a length of 8 x dia, the rope is U/S - Reduction in diameter - (Rope U/S if reduction of more than 5%)
- Corrosion
- Brittleness
- Kinks or Knots
- Insecure Swages
When coiling Steel Wire Ropes, what equipment should be used?
Coiling;
- Where possible, always coil onto a Spinner or Drum.
- Once coiled, it should be lashed to prevent uncoiling.
State the “Do’s and Don’ts” when handling Steel Wire Ropes?
DO NOT;
- Allow the wire to kink due to careless handling.
- Bend around too small a pulley, (minimum bending radius - 3 x Dia).
- Shock load, or snatch load.
- Exceed SWL.
- Do not stack other equipment on top of wire ropes (to avoid crushing)
DO;
- Lubricate frequently to prevent corrosion.
- Store in dry, airy conditions
