lifting hole on beam web
lifting hole on beam web
(OP)
I have the "traditional" lifting lug design guide.
but in this case the lifting sling will go through the thickened web of beam all the way thru the other beam of this skid.
any design guide for this this type
but in this case the lifting sling will go through the thickened web of beam all the way thru the other beam of this skid.
any design guide for this this type






RE: lifting hole on beam web
I've tried to attach via shackles so I didn't have to worry about how sharp that edge is. I wonder if the sling manufacturers can specify a minimum radius to avoid sling damage?
RE: lifting hole on beam web
I would use a full length 6 or 8" dia. pipe btwn. the two WF skids, through their webs and canti. out beyond the tips of the top flgs. by about 6 or 8" on each end. They should have a cover pl. (cap pl.) on the pipe ends a few inches bigger in dia. than the pipe to prevent a sling from sliding off the ends. There might also be some stiff. pls. btwn. the pipe and the WF web and flgs. to help support the pipe canti.
RE: lifting hole on beam web
RE: lifting hole on beam web
The goby i used didnt have a pipe and looks similar in weight to my skid.
Im the one doing the skid.
I want to know the potential issues of this.
Having lifting lug on top flange or side of beam can be a trip hazard if not cut.
This one looks clean if will work
RE: lifting hole on beam web
Agreed that you likely want a cross member between WFs near the rigging point, although this is less crucial if the rigging height is at the centroid of the beams (just weak axis effects, not torsion).
Dhengr's idea is a good one so long as your situation won't be sensitive to slight load imbalances due to sling lengths (field made slings especially aren't very precise). Uses twice as many short slings, but you don't have to worry about threading a sling through a hole (tougher than you'd imagine with slings of any significant capacity). Or do you mean the sling to be permanently part of the skid?
In some ways, lifting through the webs is easier than a traditional lifting lug as long as your web thickness isn't an issue (small loads, web doublers or HP sections) and load instability isn't a concern.
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The name is a long story -- just call me Lo.
RE: lifting hole on beam web
RE: lifting hole on beam web
RE: lifting hole on beam web
I should just weld lfiting lug on the beam top flangr instead thst would be simpler and field cut it instead.
RE: lifting hole on beam web
RE: lifting hole on beam web
What about proprietary items like swivel hoist rings, eye bolts, etc? Again, these are easily removed to avoid the tripping hazard after installation.
RE: lifting hole on beam web
What ever you do, don’t give us any of the real engineering design info., that would let us hone-in on some of the important parts of the problem. Some dimensions, loads, member sizes, etc. really help us to visualize the real problem. Otherwise, you have one guy guessing and expounding on a 1 kip load and the next guy is talking about 1000 kips and 36 WF side sills/skids, and they are all just guessing and talking past each other. In any case, the hole in your WF web will probably not be a round hole with a doubler pl., those don’t take to slings very well. It will more likely be a 2 or 3" high, by 8 or 10" long slotted hole which will take and load the sling better. Then, take a 7 - 9" long piece of 4 or 5" dia. std. pipe and cut it longitudinally into quarter sections to be used as edge softeners on your slotted holes. You do have to be able to get in under the top flg. to weld these edge softeners to the WF webs. I don’t go out of my way to design tripping or unsafe features into my structures, but are we designing walkways or equip, skids here? I’ve never seen a skid that you couldn’t trip on or fall off of, and hurt yourself, if you are not careful, but they do have to be lifted.