Visual Inspection of Steel Cables: A Step-by-Step Guide
Before any lifting operation, the visual inspection of cables is a critical, mandatory, and the fastest method to identify defects that can lead to serious accidents.
What Are We Looking For in a Visual Inspection?
Visual inspection is not limited to a quick glance. It is a systematic process focusing on four key areas:
- Wire wear: Broken wires are the clearest alarm signal. According to standards, a cable must be immediately taken out of service if a certain number of broken wires are found over a given length of cable.
- Corrosion: Rust is not just an aesthetic problem. It reduces the diameter of the wires and makes them brittle. Localized rust deep within the cable is particularly dangerous.
- Deformations: Sharp bends, flattening, "birdcaging," or excessive twisting indicate past overloading that has compromised structural integrity.
- Condition of sleeves and connections: Fixing points, pressed sleeves, and formed eyes must be checked for cracks, deformations, or signs of slippage.
The 5-Minute Procedure for Each Shift
We recommend implementing a standardized procedure before the start of each work shift:
- Clean the inspection area. Remove dirt and grease with a dry cloth to see the wires clearly.
- "Walk" your fingers along the length of the cable. Feel for broken wires, deformations, or changes in diameter that may not be visible.
- Carefully check contact areas. Examine with a portable magnifying glass the sections that pass over sheaves or wind onto the drum, where wear is maximum.
- Document any anomaly. Photograph the defect, mark its location on the cable with colored tape, and complete the technical inspection sheet.
- The "STOP/GO" decision. If there is any doubt, the rule is simple: DO NOT use the cable. Immediately consult an authorized specialist.
Attention, operator!
A cable that "feels" different, makes an unusual squeaking noise when winding, or shows a local deformation is a cable that requires immediate replacement. Do not underestimate your senses.
This rigorous daily visual inspection is the first and most important protective barrier against accidents. It does not replace official periodic inspections but is an essential complement to the safety framework.