Lifting heavy and large items is not a simple task as these processes can be dangerous and it is crucial that you choose the right chain sling that will help you to lift or move heavy items in a safe and efficient manner.
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If you are looking into your next lifting project, these tips will come in handy.
Know the intended load
When you are trying to choose chains for your lift, it is important that you know and have a plan for the item you are going to lift or move. It is a good idea that you find out the maximum working load, the size and shape of the item, the length and the amount of lifting points and their angles. Also, remember that you will need to have all of these items inspected and tagged before your lift.
Understand Chain Grades
The most common grades used in this industry are grade 80, 100 and grade 120; each of those have different breaking strengths. For instance, if you need to lift a 15 tonne item, you could use a 22mm 80 grade chain which could be very heavy and bulky; however, you will be able to lift the same item with a smaller Grade 100 chain, and even smaller Grade 120 chain. By understanding this, you will then be able to determine what chain you should be looking for in your application. If you would like to know more about the difference between grades, check out what's the difference between the grades of chain and metal.
Understand the Different Components
A fully and properly assembled chain sling will make your process a lot easier. There are many different components that can vary depending on the item you are lifting and sometimes will depend on the users preferences. As a standard chain sling you will need the head ring, oblong rings, chain, and bottom hooks.
If you want to learn more, please visit our website Lifting Chains.
Test Certificate Up-to-date
It is very important that before you start using your chain slings, you make sure that they have been properly inspected and that they have the corresponded tag.
At All Lifting we have a wide range of chain slings and fittings that will cover your next lifting project. If you require any assistance, do not hesitate to contact us on 1300 666 773 or visit our online store or any of our branches and one of our friendly staff will be able to help you and guide you in the best possible way.
5/16” Grade 70 will give you 4700lb working load limit. Official WLL on Grade 70 chain is 4:1 so break strength rating on 5/16” is 18,800lb.
3/8” Grade 30 (also known as Proof Coil) has a WLL of 2650lb but it weighs more than 5/16”, making it harder to work with. Which is why you’re better off with a physically smaller chain with a higher grade.
If you get to rigging with snatch blocks and such where you’re multiplying the pulling force of your tractor, keep in mind you really should be figuring the capacity of your rigging on WLL rather than ultimate break strength. 4:1 may be a bit extreme (figuring 3:1 or 2:1 may be reasonable if not for overhead lifting), but some items, such as ropes are rated at 2:1 so you have to pay attention to that when setting up rigging.
As a general rule, a rubber tired farm style tractor on dirt won’t have a drawbar pull greater than its own curb weight. Usually some percentage less than 100% depending on 2WD v 4WD, tire type, shear factor of soil, uphill v downhill, etc. For example, my L weighs about 3300lb. But after adding the loader, liquid ballast, and something on the 3 point it’s more like 5500lb to 6000lb. When I first got the tractor, we were breaking too much of the rigging we’d used with the old 9N and had to put a little thought into a few upgrades. Figuring max drawbar at the 6000lb max realistic weight of the tractor is probably a bit optimistic, but it also likely provides a bit of a safety factor; and we quit breaking chains and ropes.
So for lifting, it’s pretty straightforward: whatever the loader will lift add a pretty stout safety factor when looking at ratings of whatever is in the setup. For drawbar: figure out what your tractor actually weighs as configured for the pull and assume that weight is the max drawbar force before spinning out.
So, that’s why everyone is telling you to get 5/16” Grade 70. And they’re correct.
And remember, it isn’t a D9N or whatever, but it’s not a BX either. It’s a big enough machine to put some serious force on something. Enough force to, as 85Hokie said, cause some real damage if you don’t think about what you’re doing and what you’re doing it with. So put a little thought and research into whatever rigging you’re setting up for lifting or pulling, and enjoy all the stuff you can do with a very capable machine.
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