The combined safe working load (SWL) of the lifting arrangement must take account of the angle of the slings by applying an angle factor to both the slings and shackles. The angle factors are given below.
Table 4 in 'Lifting Equipment A User's Pocket Guide' 2011 edition
| Angle Factors Maximum load to be lifted = angle factor x SWL marked on sling Assumes all the slings are the same SWL. | ||||||||
|---|---|---|---|---|---|---|---|---|
| Combination of Slings | Angle β of sling legs to the vertical | |||||||
| 0° < β ≤ 45° | 45° < β ≤ 60° | |||||||
| 1 x sling leg or endless sling | 0.7 | 0.5 | ||||||
| 2 x sling leg or endless sling | 1.4 | 1 | ||||||
| 3 x sling leg or endless sling | 2.1 | 1.5 | ||||||
| 4 x sling leg or endless sling | 2.1 | 1.5 | ||||||
| 2 x two leg slings | 1.5 | 1.0 | ||||||
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