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  1. steellion

    Soil at rest pressure coefficient (Ko)

    There's nothing magic about 70 PCF for at-rest pressure; it is simply a conservative assumption (I typically use 60 PCF in the absence of more detailed geotechnical information). 53 PCF is the correct EFP for an internal friction of 34 degrees.
  2. steellion

    Designing Steel Beams For Column Collapse

    Yes, this sounds like a progressive collapse scenario. The beams will have to be designed for the new overall span length without the column there, but you can use full plastic moment capacity of the beam, typically disregard deflection limits (unless they get so large that it is a threat to...
  3. steellion

    Looking for a simple beam / frame analysis program (free)

    Go to SteelTools.org and find BEAMANAL by Alex Tomanovich. It is an Excel spreadsheet, but it has built in graphs for moment, shear, and deflection. The only downside is it's ASD only.
  4. steellion

    Spray-on Fireproofing - Construction Sequencing

    I have a 2-story building in the U.S. with composite-steel framing and cambered steel beams on the 2nd floor. Spray-on fireproofing is required for beams and columns but not the deck. The contractor asked if they could do the fireproofing before placement of the 2nd floor concrete. I advised...
  5. steellion

    Fire Wall Double Foundation?

    I agree that independent foundations are unnecessary - and also KootK has a good point to check the foundation still works if one of the walls is lost.
  6. steellion

    Should I Be Taking the PE exam or the SE exam????

    Get the PE first, then worry about the SE if it something that you desire or think this will progress your career. The PE is the moneymaker if you're in a state that doesn't have a separate SE licensure.
  7. steellion

    ACI 318 Anchor Design for Concrete over Steel Deck

    Hilti also has tables and guidelines for minimum edge distance, spacing, etc., for post-installed anchors into concrete on metal deck. Only certain types are suitable for this condition.
  8. steellion

    CERM, Keep or Sell

    Keep! I still refer to my SERM in practice frequently.
  9. steellion

    Value of Young Engineer

    I think the key is "large company". Generally, the larger the company is, the more raises and advancement are standardized based on experience rather than a meritocracy. How can your boss appreciate your extra effort when you say you have never worked with him directly? The smaller the...
  10. steellion

    ASCE 7-05 OR 7-10?

    IBC 2009 incorporates ASCE 7-05 by reference. If you're using IBC 2009, use ASCE 7-05. Don't mix and match; that will get you in trouble. IBC 2012 and 2015 incorporate ASCE 7-10 by reference
  11. steellion

    Is the lateral force caused by a Live Load on a foundation wall treated the same a floor live load?

    The 0.75 factor applies independent of direction, so it should be used for gravity and lateral. When I was studying for the P.E. exam, the study guides were riddled with mistakes, so don't let that throw you off.
  12. steellion

    Snow load on multi-level process structure

    If snow can get there (i.e. it's not an interior space), then you should assume it can get there and design for it. The snow often blows sideways here in a storm. Your snow drifts at changes in elevation may also be quite large.
  13. steellion

    Structural, Civil, Architectural

    "Do engineers still need to say "Do not scale off these drawings"?" Yes.
  14. steellion

    Should I just give up?

    Can we stop trying to diagnose the OP with depression or other mental disorders, please? It is inappropriate. I doubt any of you have a background in psychology. He just sounds like a disgruntled employee to me. As far as my advice to the OP, it would be to find whatever will make you happy...
  15. steellion

    Sign Wind Importance Factor

    If not in a heavily-trafficked area and/or 20 feet tall, I think you could justify Risk Category I for your sign. I'd rather go with what is there than play around with reinforcing footings if not needed. Does it "represent a low risk to human life in the event of failure"?
  16. steellion

    Wood frame building over concrete tilt up

    Why not make the tilt-up walls 2 stories and put a wood facade on the upper story?
  17. steellion

    HSS subjected to lateral and gravity load

    See Chapter H in the AISC Specifications for provisions for combined forces occurring simultaneously. (I'm looking at 13th Edition - the black book)
  18. steellion

    Pole Foundation

    For cylindrical pole foundations, we typically use 0.5% vertical steel and minimum column ties per ACI.
  19. steellion

    Full Snow + Live Load

    The OP is not talking about roof live load and snow load simultaneously, he is talking about floor live load and snow load simultaneously which absolutely could happen (the Christmas party was a good analogy). ASCE 7-10 load combination #3 has 1.2*D + 1.6*S + 1.0*L. I don't see a load...
  20. steellion

    Wind Pressure Minimum requirements

    Don't mix and match codes. The IBC 2012/ASCE 7-10 that has 16 PSF minimum also uses (0.6 x Wind) in all ASD load combinations. Therefore, by strict code compliance, the minimum ASD wind load has actually decreased slightly (16 PSF x 0.6 = 9.6 PSF). Give them the code references to minimum...

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