How lifting slings are rigged - Advance for using slings

How slings are rigged

Vertical

Single leg to load in straight lift. The full rated lifting capacity

can be used, but not exceeded.Load should not be allowed to

rotate since this can damage the sling.

Vertical

Choke

Using the sling as a choker reduces its rated

capacity. Rating in the following sling charts

have lower capacity for choker hitches than

vertical loadings to reflect this.When using a

choker sling at an angle of less than 120

degrees(seedrawing) the choker rated

capacity must be reduced.

Basket

A basket hitch equally distributes the load between the two legs of a sling. Consideration must be given

to the angles created in basket hitches since they reduce the rated capacity.

(See “How Angles Effect Sling Stress” below)

As the angle between the legs of the sling increase, the load each leg has to lift increases. This applies

to a single sling used in a basket hitch as well as a multi-leg sling or bridle. See illustration below.

1.First, divide the total load to be lifted by the number of legs to be used. This provides the

load per leg if the lift were being made with all the legs lifting vertically.

2.Determine the angle between the legs of the sling and the vertical.

3.Then MULTIPLY the load per leg by the Load Factor for the leg angle

being used (from the table at right) to compute the ACTUAL LOAD

on each leg for this lift and angle.

NOTE: THE ACTUAL LOAD MUST NOT EXCEED THE RATED

SLING CAPACITY.

4.Example: In drawing three (sling angle of 45 degrees):

1000 ÷ 2 = 500kg ( Per Leg if a vertical lift)

500 x 1.414 = 707kg = ACTUAL LOAD on each leg at the 45 degree

horizontal angle being used.