Overview And Distinction Of Spreaders And Rigging
Spreader: a just-needed fetching device for hoisting operations.
Rigging: When hoisting an item, a combined retrieval device with a disturbing structure hanging on the item becomes a rigging or sling. The spreader can directly retrieve items, mainly including: cargo hook, clamp and special rigging.
The composition of rigging: generally composed of high-strength disturbing parts (wire rope, lifting chain, artificial fiber, etc.) with end loops, hooks, shackles, etc.
The ultimate working load of the sling: refers to the mass (weight) that a single sling is allowed to bear when it is vertically suspended under normal conditions of use.
Rated lifting capacity of the spreader: Under normal conditions of use, the spreader is allowed to bear the mass (weight) of the item when it is hung vertically.
Safe working load of slings: except for vertical suspension use. There is an angle between the lifting point of the sling and the object, which makes the force of the sling change, and the large mass allowed under a specific hanging method. A large safe working load called a sling.