Rigging hardware also called rigging accessories, chain and wire rope fittings. It is the equipment that attaches rigging to loads and combines it into a system that can safely support heavy objects. And they are mainly combined with chains and wire ropes to form rigging equipment. Due to their different uses, we usually divide them into overhead lifting and non-overhead lifting.
WLL is the short for Working Load Limit. And It is the maximum working load specified by the manufacturer. Also this load is much less than that required to make the lifting equipment fail or yield, (known as the Minimum Breaking Load – MBL). Besides, SWL or WLL are calculated by dividing the MBL by a safety factor ( SF)
Lifting hardware can be refer to as rigging, but not all rigging can be use for lifting. As we all know that, rigging accessories for lifting usually has strict working tension and safety factor requirements. Moreover, they usually made of high-quality alloy steel. For example rigging hooks. As we can see that, grade 80 and grade 100 are usually used for hoisting and lifting. And grades G70 and G43 cannot be used for overhead lifting.
The common surface treatment of rigging gears are primary include:
Self color, electric galvanizing, hot dip galvanizing, plastic spraying, Dacro, etc..