Chain Sling Variations and Hitch Types
A chain sling is used to lift large, heavy or cumbersome loads and can be utilized in a variety of ways making them an incredibly versatile piece of lifting apparatus. The chain sling alone doesn't tr...
A chain sling is used to lift large, heavy or cumbersome loads and can be utilized in a variety of ways making them an incredibly versatile piece of lifting apparatus. The chain sling alone doesn't truly lift the cargo but acts as a powerful and supportive connector which tend to be fitted to some lifting appliance such as a crane, electric hoist or perhaps a chain block for example.
Chain slings are a common occurence in lots of areas, especially wherever big objects are manoeuvred frequently, dockyards, steel industries, foundries and numerous other kinds of factories all make use of chain slings. Some varieties of slings are attached to an anchor point on the load and others are wrapped under the object and then attached to the lifting appliance.
As a chain sling is produced from steel they will be tremendously robust, appropriate for indoor or outside utilization and also in many extreme temperatures, chemical resistancy is also a beneficial feature.
A chain sling is extremely versatile and adaptable for lifting lots of different kinds of loads, 2,three and four leg slings are common place and each can be used in a variety of different hitches to go well with the load.
Aside from the two,three and 4 leg slings, an endless chain sling is also popular, this is a continuous loop of chain. The safe working load limits of any sort of chain sling can be affected by the sort of hitch used, so always consult the necessary documents/producers for specific reductions that will need to be applied to the working load limit capacities.
There are actually 3 hitch types that are regularly used, they are the choke hitch, the basket hitch and the straight hitch.
A straight hitch is where any chain sling variety is fitted to the lifting appliance by the use of its upper master link and the hook on the end of every leg is fixed to an anchor point on the object in a straight line.
For a basket type hitch the chain will come out of the masterlink at an angle and then positioned around the object and attached back into the masterlink.
The chain in a choke hitch also goes around the load however it will be then fitted back into the chain itself rather than into the masterlink, this is ideal for smaller and cylindrical objects..
The angle at which the chain is directed out of the masterlink is vital to safety, it should on no account be more than 60 degrees nor less than 15 degrees (unless its a straight hitch) as the lift will likely be unstable. If a chain is too long you must on no account attempt to knot the chain because this will severley affect the chain's strength and will also cause damage to the links. You should use the right sort of shortening hook for safety, should a sling of the appropriate length is not accessible.
Prior to each use the chain sling should be inspected for signs of damage, cracks or distorted links, these can instigate lethal accidents if utilised in this condition. It's recommended that all chain products are carefully inspected and re-tested at 6 monthly intervals by a qualified individual, a reliable lifting gear business will have the ability to supply this examination and offer repairs if needed to keep them in a safe working condition. Chain slings tend to be fairly easy to repair for the expert and so is more cost efficient to have them regularly tested and repaired instead of simply replace with a totally brand new chain if this is not necessary.
Source: Free Articles from ArticlesFactory.com
ABOUT THE AUTHOR
Nikki Dale works for the Lifting Gear Direct group which incorporates Lifting Equipment ltd and Wire Rope Direct. We have been supplying many types of lifting equipment to trade and industry for many years and our team are very knowledgeable and experienced where lifting gear products are concerned.