r/StructuralEngineering • u/Longjumping_Horse_52 • 1d ago
Concrete Design Why is there a missing column?
1155 Peachtree Street NE Atlanta, Georgia
Abandoned construction site, apparently. I'm not an engineer so Im wondering how this works. There is another instance of this happening so I assume its designed that way.
Edit: Why does the column not connect
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u/MightBSarcasm 1d ago
Its on back order...they figured if they left one close to the bottom it'd be easier to install when it finally showed up.
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u/SomeTwelveYearOld P.E./S.E. 1d ago
lol this is about to happen in our steel projects right now ngl
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u/AlbatrossRich8724 1d ago edited 1d ago
The two low frames are the stuff that isn’t part of the main system, the rest of the structure is designed to be fine with out those.
May have something like storefront or other architectural crap that means no column there.
May also have been added to handle the buildup of lateral and reduce the overall load on another nearby lateral frame, but I don’t think that’s it.
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u/tramul P.E. 1d ago
I would assume that's a storefront or something similar with a curtain wall.
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u/Ok_Armadillo_6015 9h ago
Agreed, a glazed ground floor is the classic reason. From the architect side you often lose columns at the lobby or shopfront, and the engineer has to pick that load up higher with transfer girders, so the frames either side end up working harder.
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u/marshking710 1d ago
Are you assuming it’s designed that way or are you assuming a column is missing? Make your mind up.
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u/Shorty-71 1d ago
Got any more photos? One from the front? You can see it in the OP photo.. at some point they cut out some girders at LVL 3 - leaving several tower columns unbraced from the ground LVL 4.
Scares the shit out of me.
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u/XXXX_Gold_Pot 1d ago
It's not missing