When connecting roundslings, use conventional fittings with:
1. Large Radius
2. Straight Pins
3. Pads (or use special fittings designed for synthetic slings).
Load Factors
Additional requirements and safe operating practices may be outlined in current OSHA, ANSI /ASME B30.9, and/or other regulations as applicable.
Sling Angle (Angle of Lift)
Roundsling Angle
90º
85º
80º
75º
70º
65º
60º
55º
50º
45º
40º
35º
30º
Example: Polyester roundsling size No. 7 (purple), with a 5,200 lb. vertical basket rating: when used in a basket hitch at 60º angle, it has a maximum rated capacity of 4,500 lbs. (5,200 lbs. vertical basket rating x .866 load factor = maximum rated lift capacity)
When a choker hitch is used, the choker hitch rating should be multiplied by the load factor for angles of choke less than 120º.
Rated Capacity of Choker Hitch Table
Angle of Choke
(Degrees)
120-80
105-120
90-105
Sling Rated Load Factor
1.00
0.93
0.87
Synthetic Slings Rated Loads - Folding, Bunching or Pinching
Folding, bunching or pinching of synthetic slings, which occurs when used with shackles, hooks or other applications, will reduce the rated load.
The roundsling shall not be constricted or bunched between the ears of a clevis or shackle or in a hook. When a roundsling is used with a shackle, it is recommended that it be used (rigged) in the bow of the shackle.
