Which type of sling should never be used for hoisting personnel baskets?

A synthetic fiber sling should not be used for hoisting personnel baskets due to its potential to degrade under conditions present during such operations. Synthetic fiber slings, while lightweight and versatile, can be adversely affected by environmental factors such as UV exposure, moisture, and abrasion. These slings may also stretch under load, which can create significant safety risks when carrying personnel.

In contrast, steel wire slings and chain slings are favored for lifting heavy loads and for applications where personnel are involved because they maintain their integrity under stress and do not suffer from the same issues as synthetic materials. Webbing slings also have their uses, but they are generally designated for specific situations and may also be at risk of damage or wear, particularly with sharp edges or heavy abrasive conditions.

The choice against using synthetic fiber slings specifically stems from the heightened risks associated with lifting personnel, where failure could result in serious injury or fatality. Safety protocols tend to lean towards materials that provide the utmost reliability and minimal risk during such critical operations.