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  1. mikek396

    Best practice for connecting existing trusses and rafters to a proposed I-beam header.

    These plans are comically bad... so bad that this PE should probably be reported for practicing outside his area of expertise
  2. mikek396

    Long A325 Bolt Alternatives

    What about SAE Grade 5 bolts? I believe strength is similar and they can be purchased from McMaster https://www.mcmaster.com/products/bolts/fastener-strength-grade-class~sae-grade-5/hex-head-screws-1~/medium-strength-grade-5-steel-hex-head-screws/
  3. mikek396

    Column Bracing - Stiffness Check

    Bump
  4. mikek396

    Column Bracing - Stiffness Check

    I have a beam acting as point bracing for 3 columns with relatively light loading. Using Appendix 6 - A-6-3, I have calculated the required brace force for each column (.01*P), and using A-6-4b, I have calculated the stiffness required for each individual brace. My question has 2 parts: 1 - How...
  5. mikek396

    CANTILEVER STEEL BEAM TO CONCRETE WALL

    Looking at your plan view, it seems like a better load path would be to cantilever the blue beam at the left side to support the red tubes in the other direction at the top of the drawing
  6. mikek396

    How They Do This?

    just curious - what reference is this from?
  7. mikek396

    Sidewalk Shed Design

    Seems to me your best bet is square tube - something like 5x5 I've also seen some decorative sheds with round HSS Ive also seen 18x18 lattice columns used, although I cant find these anywhere online I've never designed these before, but would love to get involved with this type of work Seems...
  8. mikek396

    Anchorage Design for Basement Elevator

    @lexpatrie The basic concept is that instead of the machine being at the top of the shaft, there are a set of sheaves (pulleys) that the cables wrap around and then go to the bottom of the shaft to wrap around the machine. There's a pretty good diagram at this link...
  9. mikek396

    Anchorage Design for Basement Elevator

    I am looking for some help with design of anchorage for a basement elevator machine replacement. The current machine has (4) 3/4 anchor bolts, and not in the correct locations for the new machine. New design loading will be approximately 26k sustained tension load on the anchor bolt group...
  10. mikek396

    Can elevator shear wall thicknesses change?

    The change in shaft dimensions is OK, However... 1 - the top of any setback greater than 2" needs to be beveled at 75 degrees 2 - the elevator contractor should be informed as they will need to adjust their bracket dimensions - the contractor should have a maximum bracket length. IME the ~8"...
  11. mikek396

    How far to apply non-structural loads vs structural loads (ASCE 7-16)

    Take this with a grain of salt as I have very little knowledge of pipe stresses, and I havent looked at ASCE 7 before writing... I think it would be prudent to design for the higher loads. If the column doesnt need to be reinforced for the higher loads, great. If it needs to be reinforced for...
  12. mikek396

    Beam Stiffeners

    @WARose - if the issue is from cantilever bending of the web plate as opposed to torsion - adding stiffeners solves this, correct? It seems the web plates need to be added if I am to propose the x brace, so I may just have them add the stiffeners first and if there's still any movement, then add...
  13. mikek396

    Multi-State Licensure and Business Registration

    I was able to submit a NY criminal background check and it worked just fine, but it may be that PA was the second state I was applying for, so I only needed the check from the state I already had a license. It may be that you need one from each state you have a license, in which case the FBI one...
  14. mikek396

    Beam Stiffeners

    @centondollar - Im not sure I agree with your assessment that stiffeners + bearing plate wont solve this issue. Its not quite a torsion problem, but cantilever bending of the web plate There are 2 beams, 41.5" center to center. X-brace seems like overkill, and it seems like I would need to...
  15. mikek396

    Multi-State Licensure and Business Registration

    has anyone successfully figured out what registrations are needed for PA? I have a PLLC (NY) and plan to do business in PA. Is it as simple as filing the fictitious name registration form? Am i missing something else?
  16. mikek396

    Beam Stiffeners

    @xr250 - this is an interesting idea. I realize now that I left out any dimensions - this is a W18 with top flange ~12" above the slab. If this was larger, I think knee braces would work better but I'm not sure the added complexity is economical
  17. mikek396

    Beam Stiffeners

    @jayrod12 - I approximated deflecting force with delta = PL^3/3EI, as I am assuming the deflection is coming more from rotation of the web& top flange about the "fixed" end embedded in the slab. I came up with ~2250LB, but I really cant figure out where this is truly being generated as the...
  18. mikek396

    Beam Stiffeners

    I have a job where a piece of rotating equipment is sitting on top of steel beams. Rotation is in plane with the length of the beam, so theoretically there is no (or very little) lateral force on the top flange. The beams were supposed to be set such that the slab was poured flush with the top...
  19. mikek396

    Repeat Designs

    In addition to the SWL, the tag would have the shape designation and beam length for that particular beam to be sold. Putting the incorrect tag on a beam would, IMO, be 100% their liability. I understand I would inevitably get dragged into any lawsuit - but this seems like a situation with an...
  20. mikek396

    Repeat Designs

    How do you guys adjust your pricing for designs that will be used multiple times? For example: I have been asked by a machine shop to provide SWL ratings for aluminum beams they sell to contractors for rigging equipment (~5000 lbs max load). I have been doing rigging plans and choosing beam...

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