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Safety Procedures

1. IMPORTANT! The force on each hoist ring is not just the total weight divided
by the number of hoist rings. The force will be greater at lower lift angles. Make sure load is evenly distributed. See below.

Formula with example data

F = Force on each hoist ring
W = Total weight = 4000 lbs.
N = Number of hoist rings = 4
A = Lifting angle

Safe

Unsafe

2. Never exceed the rated load capacity of the hoist ring. The 5:1 safety factor is
required in case of mis-use such as overload or uneven loads.

3. Tensile strength of material to be lifted should be at least 80,000 PSI for full load
rating. For lower tensile materials, increase thread length or use a through hole with a nut and washer on other side.

4. Do not allow hoist rings to bind. If necessary use a spreader bar to avoid binding.
See example below.

Safe

Unsafe

5. Spacers should not be used between the hoist ring and the mounting surface.

6. Mounting surface must be flat and smooth for full contact with the safety hoist ring.
Tapped mounting holes must be perpendicular to the mounting surface.

7. Mounting screws should be tightened to the recommended torque. Torque should
be checked periodically as bolts could loosen in extended service.

8. Never lift with any device, such as hooks, chains or cables, that could spread or damage the bail.

9. Never apply shock loads and use good lifting practices. Always lift gradually. If shock
loading ever occurs, the safety lifting device should be inspected using magnaflux.

10. After installation, always check that ring rotates and pivots freely in all directions.

Safe

Unsafe
After slings have been properly attached to the hoist ring, apply force slowly. Make sure the bail is parallel to the direction of the load. Watch the load and be prepared to stop applying force if the load starts buckling.
Slings should not be reeved from
one bail to another.

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