The following safety precautions apply to Lifting Pins, Swivel Hoist Rings, Hoist Rings and Safety Hoist Rings.
IMPORTANT! The load on each hoist ring is not simply total weight divided by the number of hoist rings. The resultant force can be significantly greater at shallow lift angles and with unevenly distributed loads. Despite any safety factor, never exceed the rated load capacity. Always calculate the effective Working Load prior to use using this calculator or formulas.
The following applies to Lifting Pins, Swivel Hoist Rings, Hoist Rings and Safety Hoist Rings.
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Minimum thread engagement in a threaded hole is 1.5 times the diameter of the bolt when tensile strength of parent material should be above 80,000 psi to achieve full load rating. For weaker material, consider through-hole mounting with a nut and washer on the other side or contact the factory for further guidance.
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When mounting in a through hole a washer and nut must be used. Contact the factory for specific guidance. The nut must always be fully engaged.
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Do not use spacers between the hoist ring and the mounting surface.
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Mounting surface must be flat and smooth for full contact under hoist ring. Tapped mounting holes must be perpendicular to the mounting surface
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Tighten mounting screw(s) to the torque recommended. Periodically check torque because screws could loosen in extended service. For hoist rings not furnished with screws, mount using only high-quality socket-head cap screws.
Hoist Ring Inspection & Use Requirements
The following applies to Lifting Pins, Swivel Hoist Rings, Hoist Rings, and Safety Hoist Rings.
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Always inspect prior to use.
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All components must be in good working condition prior to each use.
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Tighten mounting screw(s) to the torque recommended. Periodically check torque because screws could loosen in extended service
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Always check that ring rotates and pivots freely in all directions.
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Never exceed the Load Rating or Working Load Limit.
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The load on each hoist ring is not simply total weight divided by the number of hoist rings. The resultant force can be significantly greater at shallow lift angles and with unevenly distributed loads. Despite any safety factor, never exceed the rated load capacity. Always calculate the effective Working Load prior to use using this calculator or formulas.
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Do not apply shock loads. Always lift gradually. Perform visual inspection and magnaflux testing if shock loading ever occurs.
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Never lift with a hook or other device that could deform the lifting ring. Do not use cable assemblies for lifting.
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Do not allow hoist rings to bind. Use a spreader bar, if necessary, to avoid binding.
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For specific removal criteria follow ASTM B30.26-2015 Section 26-2.8.5
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Additional periodic Inspection Criteria & Frequency as per ASTM B30.26-2015, Section 26-2.8.4