The capacity of one 1/2-inch wire rope sling is 4,700 pounds.

The capacity of one 4-inch nylon web sling is 6,220 pounds. 6,220 x 2 = 12,400. This is more than the load of 12,000 pounds.

The capacity of a 9/16 inch, 2-leg wire rope bridle is 9,900 pounds.

The bridle is being used in a choker hitch configuration so the capacity of 9,900 must be multiplied by .75.

9,900 x .75 = 7,425. This is more than the load of 7,000 pounds.

The capacity of a 1/2 inch, 2-leg chain sling bridle is 16,627 pounds.

The bridle is being used in a choker hitch configuration so the capacity of 16,627 must be multiplied by .75.

16,627 x .75 = 12,470. This is more than the load of 11,800 pounds.

The formula used to determine the tension on each shackle is:

Length of sling x weight of load divided by 2 x the height from the load to the hook.

The length of the slings is 16 feet and the weight of the load is 15,000 pounds. The height from the load to the hook is 12 feet.

The formula used to determine the tension on the shackles is:

The capacity of a 7/8-inch shackle is 13,000 pounds. This capacity is greater than the tension on each shackle.