6
Example: 10 mm 2-leg chain sling + one additional 2-leg sling = WLL 4-legs
At angle 0-45 degrees the WLL is 8T
Safe use
Preparation:
Before starting the lift, it should be ensured that the load is free to move and is not bolted down or otherwise obstructed.
Protection may be required where a chain comes into contact with a load in order to protect either the chain or the load or both, since sharp
corners of hard material may bend or damage the chain links, or conversely the chain may damage the load because of high contact pressure.
Corner protection should be used to prevent such damage.
In order to prevent dangerous swaying of the load and to position it for loading, a tag line is recommended.
When loads are accelerated or decelerated suddenly, dynamic forces occur which increase the stresses in the chain. Such situations, which
should be avoided, arise from snatch or shock loading ex. from not taking up the slack chain before starting to lift, or because of the shock from
falling load being stopped.
Safety when lifting:
Hands and other parts of the body should be kept away from the chain sling to prevent injury as the slack is taken up.
When ready to lift, the slack should be taken up until the chain is taut. The load should be raised slightly, and a check made that it is secure and
assumes the position intended. Lifting personnel must be aware of the risks of swinging and tilting loads. This is especially important with basket
or other loose hitches where friction retains the load. Never allow persons or body parts under hanging load. Do not allow persons to ride on the
load while the load is being lifted.
Landing the load:
The landing site should be well prepared. It should be ensured that the ground or floor is of adequate strength to take the load
taking account of any voids, ducts, pipes etc. which may be damaged or collapse. It should also be ensured that there is adequate access to the
site and that it is clear of any unnecessary obstacles and people. It is preferable to use timber bearers or similar material to avoid trapping the
sling or to protect the floor or load or to ensure the stability of the load when landed.
The load should be landed carefully ensuring that hands and feet are kept clear. Care should be taken to avoid trapping the chain sling beneath
the load as this may damage the sling. Before allowing the chains to become slack, the load should be checked to ensure that it is properly sup-
ported and stable. This is especially important when several loose objects are lifted in basket hitch and choke hitch.
When the load is safely landed the chain sling should be carefully removed to avoid damage or snagging or causing the load to topple over. The
load should not be rolled off the sling as this may damage the sling.
Storage of chain slings:
When not in use chain slings should normally be kept on a properly designed rack. They should not be left lying on the
ground where they may be damaged. If the chain slings are to be left suspended from a crane hook, the sling hooks should be engaged in the
master link to reduce the risk of sling legs swinging freely or snagging. If it is likely that the slings will be out of use for some time they should be
cleaned, dried, and protected from corrosion, e.g. lightly oiled.
Inspection and maintenance
Examination:
During service, chain slings are subjected to conditions that may affect their safety. It is necessary, therefore, to ensure, as far as is
reasonably practicable, that the sling is safe for continued use.
If the tag or label identifying the chain sling and its working load limit becomes detached and the necessary information is not marked on the
master link, or by some other means, the chain sling should be withdrawn from service.
The sling should be withdrawn from service and referred to a competent person for thorough examination if any of the following is observed
before each use:
+
= WLL 4-legs
Ø 10 mm Grade 10
WORKING LOAD LIMIT
1-LEG
4 t 3,15 t
2-LEG 0-45
°
45-60
°
5,6 t 4 t
3-LEG 0-45
°
45-60
°
4-LEG
8 t 6 t
x
Summary of Contents for Grade 10
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