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<blockquote data-quote="Tim McCulloch" data-source="post: 31919" data-attributes="member: 67">Re: required chain grade for overhead suspensionThe point of attachment should be 3/8&quot; wire rope sling for loads up to 2,000#; 1/2&quot; wire rope for 2 ton points, probably a &quot;basket&quot; or &quot;split basket&quot; if the beam is particularly large.&nbsp; You should NEVER use a polyester round sling as the *primary* attachment to the building structure.Wire rope and slings properly made therefrom are used every day to rig many tons of production equipment from arenas.&nbsp; Your fear is unfounded, and contradicted by &quot;best practices&quot; in rigging.&nbsp; The length of wire rope slings you need for a &#039;stinger&#039; can be easily calculated if you know the hoist chain length, the height of the structural attachment (beam) and the desired trim height.&nbsp; Simple math.Also note that Grade 80 chain of a size large enough to use a 5/8&quot; shackle will be VERY expensive and unnecessary.&nbsp; This whole thing is a kludge, and I don&#039;t understand why you come here asking for guidance that you then summarily ignore.</blockquote>

[QUOTE="Tim McCulloch, post: 31919, member: 67"] Re: required chain grade for overhead suspension The point of attachment should be 3/8" wire rope sling for loads up to 2,000#; 1/2" wire rope for 2 ton points, probably a "basket" or "split basket" if the beam is particularly large. You should NEVER use a polyester round sling as the *primary* attachment to the building structure. Wire rope and slings properly made therefrom are used every day to rig many tons of production equipment from arenas. Your fear is unfounded, and contradicted by "best practices" in rigging. The length of wire rope slings you need for a 'stinger' can be easily calculated if you know the hoist chain length, the height of the structural attachment (beam) and the desired trim height. Simple math. Also note that Grade 80 chain of a size large enough to use a 5/8" shackle will be VERY expensive and unnecessary. This whole thing is a kludge, and I don't understand why you come here asking for guidance that you then summarily ignore. [/QUOTE]

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