NCCER Rigging Practice Exam

To determine the force applied to each leg of a 2-leg bridle sling when lifting a load, it is essential to first understand how the load is distributed among the slings based on their angle and configuration.

In this scenario, the total load being lifted is 20,000 pounds. When using a 2-leg bridle sling with a horizontal angle of 30 degrees, the vertical components of the forces in the slings contribute to lifting the load.

For a two-leg sling, the forces in the legs must be evaluated based on the angles. The total vertical lift force (which is the weight of the load) is balanced by the vertical components of the forces in each leg of the sling. These components can be determined using trigonometric principles.

When the sling's angle is at 30 degrees, the sine of 30 degrees equals 0.5. This means that each leg of the sling must carry some of the weight, and due to the angle, each leg will experience a greater tension than just half of the total load.

To calculate the force in each leg, we can use:

\[

\text{Total Load} = (\text{Force in each leg}) \times \sin(\text{angle})