Lifting Beam calculations
Lifting Beam calculations
(OP)
Hey everyone,
I'm trying to design a lifting beam that is going to lift 2 objects side by side. The smaller object is about 8 feet long & weighs 2200 lbs, and the larger object is about 22 feet long & weighs 36000 lbs. We are using a single lifting point over the center of gravity, and are trying to use something that looks similar to a modified "J" shape
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That's my attempt at a diagram, I know it's hard to follow. The long object has 2 I-beams running down the length, the small object has 1 beam running the length, and then there are 2 beams connecting the two together. The beams have big J-hooks on each side of them, which they'll slip cable slings over to pick up the objects.
I know my attempt at the explanation kind of sucks, but can someone help me with the calculations & analysis so I can see if what I've done will be strong enough? I tried running some FEA but it killed my computer, and I'm only 5 months out of school so I'm used to neat textbook solutions, not these crazy real world problems. Thanks.
I'm trying to design a lifting beam that is going to lift 2 objects side by side. The smaller object is about 8 feet long & weighs 2200 lbs, and the larger object is about 22 feet long & weighs 36000 lbs. We are using a single lifting point over the center of gravity, and are trying to use something that looks similar to a modified "J" shape
!
!-!
!-!
That's my attempt at a diagram, I know it's hard to follow. The long object has 2 I-beams running down the length, the small object has 1 beam running the length, and then there are 2 beams connecting the two together. The beams have big J-hooks on each side of them, which they'll slip cable slings over to pick up the objects.
I know my attempt at the explanation kind of sucks, but can someone help me with the calculations & analysis so I can see if what I've done will be strong enough? I tried running some FEA but it killed my computer, and I'm only 5 months out of school so I'm used to neat textbook solutions, not these crazy real world problems. Thanks.





RE: Lifting Beam calculations
That is probably why you got no response.
RE: Lifting Beam calculations
the only reason i can see to have I-beams running the length of the slung things (lets call them thing1 and thing2) is because they are supported by the I-beams along their length (rather than attached at their ends).
maybe thing1 and thing2 aren't able to support their own weight, so you've lashed them to the I-beams.
i suspect zekeman's point is that you probably won't want to design a fixed point of support ('cause this doesn't allow for any variation). supporting the sling point on a bunch of cables, so it can easily adopt the CG location, probably makes more sense.
this isn't my field, but maybe you could use a set of turnbuckles, cables with length abjustment in them. maybe this is too "fussy" for your application.
RE: Lifting Beam calculations
MIL-STD-209J
ASME B30
http://ww
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