What is the minimum size of chain sling required for a 4 leg-bridle with legs at 60 degrees, Grade 80, and a load weight of 35,492 lbs?

To determine the minimum size of the chain sling required for a 4 leg bridle with legs at 60 degrees and a load weight of 35,492 lbs, it is essential to calculate the load that each individual leg of the sling will bear.

First, when using a bridle configuration, the load is distributed among the legs, and that distribution is impacted by the angle at which the legs are positioned. With legs at 60 degrees, each leg supports a portion of the load that must be adjusted based on the angle. The formula to calculate the load on each individual leg in a bridle system, factoring in the angle, is as follows:

1. Calculate the tension in each leg: The tension in each leg can be determined by:

   [ \text{Leg Load} = \frac{\text{Total Load}}{\text{Number of Legs} \cdot \cos(\theta)} ]

   Here, (\theta) is the angle of the sling leg from the vertical. For 60 degrees, (\cos(60^\circ) = 0.5).

2. Plug in the values:

   [ \text{Leg Load