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Recent content by GC_Hopi

  1. GC_Hopi

    What is considered Supplementary Reinforcement for anchorage design in reinforced concrete pedestal

    You need to get a development length of the stirrup which is difficult in a pedestal. I always recommend Design of anchor reinforcement in concrete pedestals by Widianto, Patel and Owen as a reference. You can find it online. Below is an except. Or ASCE's Anchorage Design for Petrochemical...
  2. GC_Hopi

    PEMB Zee and Cee Purlins

    Here is an example of one bay with heavy bracing
  3. GC_Hopi

    PEMB Zee and Cee Purlins

    Correct with the anti-roll clips the purlin still has to have enough strength to span between them so that limits that amount of loading it can take. Also correct with the bracing you are making a truss to resist that weak axis load so you can take a lot more loading and you are summing to load...
  4. GC_Hopi

    PEMB Zee and Cee Purlins

    I have seen PEMB use additional clips or plates at the frames to brace the purlins. They will call these anti-roll clips. Then at the eave, they will put in a lot of braces at ~4'-0" spacing then continue it back 3 or 4 purlins to distribute the loading. You have to use specialized software to...
  5. GC_Hopi

    Structural Engineering books for donation

    I will let others have their pick but after a week or so. I will be interest in them for our company library so they will have a good home.
  6. GC_Hopi

    Help Pipe Support Engineer with Moment Connections

    You could put in some bracing to take the axial load out. That would save you from moment connection design. Side note: I usually see the HSS beam located at the bottom flange of the W30 and typically an angle is used. You probably have your reasons for the design. Just wanted to throw that out...
  7. GC_Hopi

    Scanning Pile Rebar From the Top

    A lot of what you see will depend on the skill of the GPR operator. I have only see and been told by GPR companies that the maximum reliable depth is 10 inches. Scanning down to see the ends of vertical rebar will be quite challenging. Also GPR will not get you information on rebar diameter...
  8. GC_Hopi

    Masonry Cleanouts

    Probably some items to consider when deciding what cell to cut open are which would happen after the scans.... dimensions of the wall and height of the wall to make a judgement on what frequency in plan and elevation would given you a representative sample. Also, stress in the CMU so you can...
  9. GC_Hopi

    Masonry Cleanouts

    I think thermal scanning or gpr is a given then throw cutting open cells on top of that as engineering judgement and for piece of mind.
  10. GC_Hopi

    Masonry Cleanouts

    Have them cut on the face on a number of the cells at the bottom of the wall to prove there is minimal droppings. If they find some then cut all cells with rebar. Is this partially grouted? Or go straight to check all the cells that have bar. What is your comfort level... at this point they bear...
  11. GC_Hopi

    SE Exam New format April 2024

    Am I reading the NCEES website correct... 1,400 dollars in testing fees for an SE assuming you pass all test on the first round. 2,100 dollars if you end up retaking two sections. PE is 400 dollars. *Just to be facetious. Do SE earn 3 times more than a PE or is that ratio just hold for fees...
  12. GC_Hopi

    Fastening Steel Deck Alternatives

    How are people handling substitution request for deck fastening to open web joists? Is the contractor/third party engineer requesting the substitution responsible for checking strength, stiffness, base material thickness and does this need to be sealed or should the EOR include this re-design...
  13. GC_Hopi

    3rd Party Engineering Services without a PE Stamp?

    I would also add that the owner can be more strict than the code and require a seal even if the code does not require one. The code is a minimum.
  14. GC_Hopi

    IEBC Substantial Structural Alteration

    For tall structures, IEBC has provisions on the height that get triggered. I think the height provisions are for non-structural stuff like egress. That's outside of this discussion.
  15. GC_Hopi

    STAAD vs others

    I consider STAAD more of a general FEM software but has old design codes ie aluminum design code from the 1998 or not integrated very well into the design modules ie no masonry design or you need an external design process. The only design module that is decent is the STAAD to RAM connection...
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