Frequently Asked Questions (FAQs)
1. What is the most common wire rope sling?
The most common type of wire rope sling is the single part sling. It comes in various options such as single leg, four-leg/spreader, hand splice termination, and mechanical splice termination. These slings are widely used due to their versatility and effectiveness in lifting and rigging applications.
2. What is the proof load of a wire rope sling?
The proof load of a wire rope sling is generally 2 times the lowest rated load of any sling component. However, hand spliced slings should not be proof loaded beyond 1.25 times the rated load. It is important to ensure that the entire sling, including the end attachments, is properly loaded during proof testing.
3. What are the disadvantages of wire rope sling?
Wire rope slings have a few disadvantages compared to chain slings. These include lower strength-to-weight ratio, difficulty in inspecting the construction (especially the core), susceptibility to corrosion, and potential issues like kinking, crushing, or broken wires due to misuse or abuse.
4. Are wire rope slings heavier than chains?
Wire rope slings are lighter in weight compared to chain slings. They also have advantages like lower initial cost, high flexibility, smaller diameter design, high strength, fatigue resistance, abrasion resistance, corrosion resistance, and flexibility. These characteristics make wire rope slings suitable for various lifting applications.
5. What is the standard length of a wire rope sling?
The standard length of wire rope slings with soft eyes at both ends commonly used for heavy lifting operations is typically 6m, 12m, 16m, or 20m. These slings have a safety factor of 7 and a safe working load (SWL) ranging from 5 ton to 40 ton.
6. What are 3 reasons to take a wire rope sling out of service?
There are several reasons to take a wire rope sling out of service, including missing or illegible identification, broken wires, severe localized abrasion or scraping that reduces the nominal diameter by more than 5%, kinking, crushing, birdcaging, or any other damage that affects the rope structure, and evidence of heat damage.
7. Which is stronger wire rope or chain?
Wire rope is generally stronger than chain. The multiple strands of continuous wires give wire rope its strength, while a chain is made up of interconnected links. Wire rope is commonly used in applications where high strength and durability are required.