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REEVING INCREASES LOADS TRIPLE AND QUAD LEG SLINGS  
   
 
 
Reeving through connections to load increases load on connections fitting by as much as twice.DO NOT REEVE! Triple leg slings have 50% more capacity than double
leg only if the center of gravity is in center of connection
point and the legs are adjusted properly. (equal share
of the load)

Quad leg slings offer improved stability but do not
provide increased lifting capacity.

 

 CENTER OF GRAVITY (COG)

 

The location of the center of gravity to the pick points is an important consideration
   
When lifting vertically, the load will be shared equally if the center of gravity is placed equally between the pick points.  If the weight of load is 10,000 lbs., then each sling will have a load of 5,000 lbs. and each shackle and eyebolt will also have a load of 5,000 lbs. When the center of gravity is not equally spaced between the pick points, the slings and fittings will not carry an equal share of the load. The sling connected to the pick point closest to the center of gravity will carry the greatest share of the load.

Sling 2 is closest to COG. It will have the greatest share of load.

Sling 2 = 10,000 x 8/ (8+2) = 8,000 lbs.

Sling 1 = 10,000 x 2 /(8+2) = 2,000 lbs.

 
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