Originally published 07/22/2015
Chains are common on every construction site, and you should be aware of the best chain to use for a particular purpose.
There are different chain grades, and each one has a different use or application. These can be separated into three main categories:
- Overhead lifting chains – only use grades 80, 100 or 120 for overhead lifting.
- Transport hauling chains – grade 70 is excellent for load securement and tie-down applications when hauling loads.
- Other welded industrial chains – choose 30 and 43 grade chains for pulling, agricultural and load securement applications.
Select a chain designed for the job you are doing. For instance, if you are planning to pull a vehicle out of the mud with another vehicle, you should use a chain that has a grade of 80 or above. A chain of lesser grade might break, and the snapback could injure or kill someone. While stronger chains typically won’t snap, the pulling force may cause the pulled vehicle’s hooks, bumpers and frames to bend or break.
Inspect chains on a regular basis. Wear points indicate that the chain is weaker than its original grade level. Look for wear at the points of contact between each chain link and for stretched, twisted or deformed links. Make sure that the chain flexes easily, and there is no heat exposure damage like discoloration and weld splatter.
Lifting chains should have metal tags showing the grade and load rating. If the tag is missing, do not use the chain. Never assume that an unmarked chain is strong enough for lifting.
While chains are rugged and useful tools, they will break when we exceed their limits. Use common sense with chains. Never stand directly under a load, and never modify or improperly use a chain.