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  1. Parker87

    Structural integrity of a welded steel stand for two condenser units

    Is this supposed to be some kind of a funny joke? In case you misunderstood what I was saying, I was referring to the ones I want to put between the stand and the concrete which, just like the smaller ones for the condenser units, are specifically designed to kill vibrations. The stand needs...
  2. Parker87

    Structural integrity of a welded steel stand for two condenser units

    95 pounds each, 190 total.
  3. Parker87

    Structural integrity of a welded steel stand for two condenser units

    If I use the rubber mounting feet and raise the frame a couple of centimeters off the ground, I might be able to go with a simpler design, something like this: In this scenario, the rubber feet will have to be positioned further away from the corners (either close to or exactly where the...
  4. Parker87

    Structural integrity of a welded steel stand for two condenser units

    Good catch, but the normal/preferred clearance is actually 600mm, which is the minimum I would aim for. Page 10 of another, more generic LG manual (http://web.mit.edu/parmstr/Public/hvac/LGelectronics/Installation%2520Manual_LA125HV_MFL39817303.pdf): My '1 meter' claim was erroneous — I was...
  5. Parker87

    Structural integrity of a welded steel stand for two condenser units

    I had a recently retired architect friend of my parents look at my sketches and he said that if I use the 2"x 2" HSS, I won't need any supporting braces/struts and could probably do without the front corner posts in the bottom as well, because the load is very light. For the vibrations, he...
  6. Parker87

    Structural integrity of a welded steel stand for two condenser units

    With all these options and details to consider, I feel like I keep getting further and further away from making any final decisions. :) If I do the boxed bottom and diagonal braces for the top shelf, do I still need to miter the joints? I would refrain from messing with the concrete for...
  7. Parker87

    Structural integrity of a welded steel stand for two condenser units

    Are you suggesting I don't use the anti-vibration mounts and secure the stand directly to the concrete or something else? I was thinking of doing something like this:
  8. Parker87

    Structural integrity of a welded steel stand for two condenser units

    By the way, the only floor/ground anti-vibration mounts I can easily obtain are of the following kind: https://4.imimg.com/data4/JY/UG/MY-2836580/kpn-type-pedestal-anti-vibration-mount-500x500.jpg. Makes me wonder how long they would last outdoors before the rubber starts degrading and falling...
  9. Parker87

    Structural integrity of a welded steel stand for two condenser units

    Thanks, BA. The reason I don't want to have those verticals on the front is because: (1) It will look ugly and restrict airflow to the bottom unit (minor concern) and (2) It will make it difficult to install (and service?) the bottom unit, which will have to be "slid in" from the side. And to...
  10. Parker87

    Structural integrity of a welded steel stand for two condenser units

    So it's be better to use HSS with thicker walls (e.g. 2" x 2" x 11ga)? The reason I want to use 2" x 2" for the horizontal arms is because the condensers' mounting legs are 2" wide and I can get rubber buffers with the same diameter so everything fits neatly on the 2" square tube. One more...
  11. Parker87

    Structural integrity of a welded steel stand for two condenser units

    Following some of the suggestions provided in this and the other thread, I have updated my design to the following: Not sure if this would be the right type (or size) of gussets to use, so if anyone has a different/better idea, please let me know.
  12. Parker87

    Structural integrity of a welded steel stand for two condenser units

    Dik, the vibration isolators have independent top and bottom threading so you can't really screw through them: https://www.dinex.net/rubber-buffer-silencer_p-80951 Considering the specifics of the weight load distribution, would you still say there's no need to put any diagonal braces or...
  13. Parker87

    Structural integrity of a welded steel stand for two condenser units

    Concrete foundation surrounding a brick veneer house. Because I don't have sufficient space to put them side by side in the location I want to utilize. Clearance requirements suggest a lot of open space around them — they will have to be placed at least 1 meter apart and be clear of any...
  14. Parker87

    Structural integrity of a welded steel stand for two condenser units

    Sorry for the double post, that was a mistake. I wanted to delete the other one but it's just now that I am noticing the "delete" button at the bottom of the OP. I want to respond to the replies I got there, too, so I will replace the content of the OP with a link to this thread instead of...
  15. Parker87

    Structural integrity of a welded steel stand for two condenser units

    I've recently bought two mini split heat pumps and want to build a stand to hold the outdoor units. I would like to obtain an E-shaped cantilever structure but am unable to determine whether the beams will hold the units safely in place without adding some form of additional support (e.g...
  16. Parker87

    My thread disappeared

    Thanks for all the helpful tips, Dik, I really appreciate it. Hmm. And what if I want to use four of these (or similar) as mounting plates (between the stand and the concrete)? Wouldn't it be better for the rubber mounts to be centered, i.e. placed directly below the base tubes as opposed to...
  17. Parker87

    My thread disappeared

    Not that I feel I should defend my credentials after being disrespected and put down for no reason, but I am a technology professional with a graduate degree in CS and experience in various computer and audio engineering disciplines. And no, I'm not mounting a TV... Let's try this again...
  18. Parker87

    My thread disappeared

    What copyrighted material? I did the drawing myself and the PDF pages were extracted from LG's installation manual which is publicly available, both offline and online. And even if that link was the problem, it could easily have been removed from the OP instead of deleting the entire thread...
  19. Parker87

    My thread disappeared

    I did include a technical drawing and an external link to a relevant section of an official LG spec sheet (in PDF format, hosted on Dropbox). Could this have been the culprit? And, if there was an issue with my post, why wasn't I warned or at least told what I did wrong so I know not to do it...
  20. Parker87

    My thread disappeared

    I AM an engineer, just not a structural one. I was neither promoting, selling, recruiting, nor asking for help related to any coursework. I guess it can be considered a DIY project, but where is this mentioned in the posting guidelines? I was being professional and asking specific technical...

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