Question regarding a wire rope rigging and lifting

The rating of the wire cable is a linear strength. Once you bend it over ( or use cable clamps or deform in any manner) , consider the strength reduced by half if not more. So now your wire cable is only rated at a maximum of 7.5t. This leaves no margin of error. Don't do it unless you get stronger cable. A good rule of thumb is if the load is 6 tonne get a cable that is rated at a minimum of 24t. This is usually overkill but you don't mess with suspended loads. They have a tendency of killing people.

Get advice from professional such as Bullivants.

You could look at this for general calculations.

I agree with the previous answer. but here is another way to do this.

Cut the cable in the center where it will go over the Bull hook and splice a eye with an hight tensional lifting ring into them this will also hold center.

You should never use a wire ripe draped over a hook; as others have said, this crushes the wire rope and also reduces the safe lifting strength by at least half. You should use a proper sling, with the hook passing through an eye, shackle, thinble or other suitable lifting attachment.

you determine your lifting capacity not only by the size rope but how you rigg it striaght pull ,choke ,basket, and degree of angle of pull it is never good to rigg a pipe the way you have it because if not level it can tip and it will end up straight up how ever if you need to rigg this way put a shackle under the hook traping the cables it will make it more stable as far as friction and wear the hook wont hurt the cable for your rigging purposes use the choker rating on a rigging chart that is the easiest way to determine capacity

You also have to beware that if you just drape the wire rope over a hook it has a tendency to slip unless the load is perfectly balanced when it lifts. Once the load it rotating it will gain momentum quickly. This usually results in a dropped load with the resulting injury.

As has been pointed out there is a proper way to do this that accounts for the contingencies. If you don't follow this you're begging for trouble.

A knowledgeable lift operator will use a spreader bar on such a load and a double hand tag line to control tilt..sway..rotation.

MR. GUY

Yes, The proper way would be to use 2 cables with protected eyes and a shackle of at least 3 times the load capacity of the cable. Each cable should be capable of suspending and maintaining the lift by itself under all circumstances. Cables in the shackle, shackle in the hook. The more angle on the cable the less it can hold. The difference is significant so consult your engineer or operator. I forget the formula but i wouldn't go over 30 degs. total.

Overkill is best ... remember that a 10 ton load requires you exceed 10 tons of force to get it moving. Also there is the possibility of wind load. Sudden shock due to operator error or any number of other pitfalls