The strength of lifting belts is far inferior to metal lifting equipment, which is a fact that cannot be ignored. However, lifting belts are still very popular, and the reason for their popularity is not only because they have the ability to protect lifting targets and are easy to carry, but also because of their safety factor, which cannot be ignored.
We compare with steel wire rope rigging. Although lifting belts are not as load-bearing as steel wire rope rigging, their safety factor is not inferior to the wind, and even higher than that of steel wire rope rigging. The so-called safety factor is the ratio of the ultimate allowable stress to the rated load, which means that under the same rated load, the higher the ultimate allowable stress, the higher the safety factor.
The safety factor of steel wire ropes used as lifting machinery equipment is generally between 3.5-4. Taking 4 as an example, if the rated load of the steel wire rope is 5T, it will break when it bears a force of 20T.
The safety factor of the lifting belt is about 6 or above. Based on the same rated load of 5T, the lifting belt will only break when the force on the lifting belt reaches 30T. This result is already obvious, and the lifting belt has higher safety.