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  1. alphanumericname

    Experience with Subterranean Transmission Lines (161kV+)

    Hi everyone, Does anyone have experience with underground high-voltage transmission lines? If so, and you are comfortable with answering some questions, I am looking for more info on any or all of the following: 1. What circumstances necessitated the use of underground lines? 2. What is the...
  2. alphanumericname

    Pier-Slab Questions

    Great, thank you!
  3. alphanumericname

    Pier-Slab Questions

    Thanks. I checked bearing stress and overturning (I forgot to include this in the original post), but I was not thinking about sliding. I'm assuming this is an instance where I need to utilize passive earth pressures. For overturning, I broke the area of the pullout cone that will be resisting...
  4. alphanumericname

    At what depth do sinkholes begin to pose a risk?

    Do you have sinkholes below grade, or a cave? Most limestone caves I have seen firsthand have a solid layer of rock along the roof of the cavern. A sinkhole below grade (having been filled) is a huge problem waiting to happen; it will most likely open back up when the fill dirt has washes into...
  5. alphanumericname

    Pier-Slab Questions

    Hello, I am designing a pier-slab moment foundation to support an 85' pole that is loaded in two directions. The pier is 6'x6'x11', the slab is 20' x 20' x 3', and the slab will sit 10.5' below grade on excellent quality limestone. The excavated soil will be backfilled with gravel. It will have...
  6. alphanumericname

    Houseplan/Home Design

    Thank you so much! That's the kind of content I am looking for. I ordered a copy of the book. I appreciate the insight.
  7. alphanumericname

    Houseplan/Home Design

    I am interested in it because I enjoy design and would like to try my hand at it myself. There is enough free content on the internet that someone could use YouTube and learn exactly the same things that I learned in college while getting my degree, possibly with better quality. In fact, MIT has...
  8. alphanumericname

    Houseplan/Home Design

    Hello, I am a Civil/Structural engineer and would like to learn how to design house plans. Are there any good, modern courses (paid or free) that would help with this? I am mostly interested in using Revit. I primarily want to design a home for myself but would love to learn how to edit and...
  9. alphanumericname

    Euler Method

    Thanks! That was the confirmation I needed. I will stick to AISC code.
  10. alphanumericname

    Euler Method

    Hello, Does Euler's Formula for buckling generally give a good, quick estimate of the critical buckling load, or should it be disregarded in exchange for modern buckling formulas provided by AISC or ACI? I am studying for my PE and am trying to decide whether or not it can be used as a time...
  11. alphanumericname

    Steel Design Effective Length Question

    BARetired, Thanks for the timely response. To be more specific, I am wondering why (KL)x/(rx/ry) is used at all instead of (KL)x/(rx). I'm just not sure what the point of the ratio is. You may have explained it in your reply, but for some reason this concept is completely flying over my head.
  12. alphanumericname

    Steel Design Effective Length Question

    I've attached the photo to this reply. Sorryhttps://files.engineering.com/getfile.aspx?folder=e292c093-ab53-4dc7-b157-7acd24068e93&file=4-1.PNG
  13. alphanumericname

    Steel Design Effective Length Question

    Hello, I am preparing to take my PE exam in Civil-Structural in two weeks. I have been trying to become proficient using the AISC 360 design tables to save time. One question I cannot find a thorough explanation for is the use of equation (4-1), see attached. More specifically, if I have a...

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