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  1. MacGruber22

    Tension Reinforcement for anchor bolt

    DoubleStud - Unless there is a seismic concern, I would have no issue reducing straight bar ld based on actual stress. -Mac
  2. MacGruber22

    BAR SIZE LIMITATION FOR WATER RETAINING STRUCTURE

    ACI 350-06 7.12.2.2 requires #4 minimum bar size for shrinkage and temp reinforcement. That is pretty much everything IMO - main bars may not be controlled by temp and shrinkage but they are acting to resist it. Chapter 19 on shells and plate members requires #4 for everything (19.2.7). ACI 350...
  3. MacGruber22

    Tension Reinforcement for anchor bolt

    https://drive.google.com/file/d/13TNfWE-CQx54UHx0LCKIGxs_yJKqSHWo/view?usp=drive_link I would not count on pedestal bars that are farther away from the anchor rods than 1/3 hef regardless of the theoretical ld from the intersection of the breakout cone. A lot of movement would need to occur to...
  4. MacGruber22

    "Automation" of Column Alignment Chart

    SF2607 - Yeah, a good guess keeps the algorithm in bounds. -Mac
  5. MacGruber22

    "Automation" of Column Alignment Chart

    I like the VBA option. Just need to be careful that adding commentary to the code will change the "Go To" line. -Mac
  6. MacGruber22

    "Automation" of Column Alignment Chart

    Thanks. I did find the chart equation. I had presumed it was more of a complicated step function. I was lazy and added a goal seek macro and button. Sometimes the solution is out of bounds, but resetting K to 1 gets it back to a reasonable re-solution. -Mac
  7. MacGruber22

    "Automation" of Column Alignment Chart

    Hey that is great! I will test it out. -Mac
  8. MacGruber22

    "Automation" of Column Alignment Chart

    Has anyone ever tried turning the alignment chart into an excel spreadsheet that allows direct calculation rather than graphically drawing a line between ΨA, ΨB, and K? RAM concrete does not automatically account for p-delta in concrete columns. This necessitates a hand calc check on whether...
  9. MacGruber22

    PT Slab Edge Protection During Controlled Demolition

    I agree we are protecting the 1% chance. But, it is about risk not just probability. Our contractor scope is limited to edge protection and cutting tendons. Another sub is handling shoring and demo. Not a fan of this but we are not running the show. We are at a preliminary stage till our client...
  10. MacGruber22

    PT Slab Edge Protection During Controlled Demolition

    That sounds very tiring lugging sand bags around. -Mac
  11. MacGruber22

    PT Slab Edge Protection During Controlled Demolition

    Does anyone else specify bent plates at live tendon anchors to control blow out during de-tensioning? I proposed it to a demo contractor and they liked the concept. 16" long x 1/8" thick 6063-T6 channel shape bolted top and bottom with total of four HUS-EZ screws. We were going to use ballistic...
  12. MacGruber22

    FALL ARREST LOAD (ASCE and OSHA)

    Bones - Yikes. I hate the stiffness of that "base plate". Not sure if it is helping to absorb energy or hurting by causing serious second order forces on the fasteners. -Mac
  13. MacGruber22

    FALL ARREST LOAD (ASCE and OSHA)

    We design these systems as part of major facade remediation and roofing replacement projects. The major hurdle is convincing owners to have a permanent system installed. You seem to have made it past that difficult part, though it is not clear to me what your role is - EOR, component designer...
  14. MacGruber22

    Apartment Building Collapse

    Here is my opinion, which will not be well-received by some individuals on this site. The obsessive haste to provide armchair engineering assessments is wholly unprofessional and inappropriate. Additionally, the act of promoting this type of pseudo-expert analysis through monetized YouTube...
  15. MacGruber22

    Geofoam backfill

    I have received unit pricing within the last month of $400 cu/yd for 250 cu.ft of EPS-12 (Baltimore). Also, the price is very volatile as I was told by the contractor. Good idea to present conceptual alternates for pricing before taking a design all the way with EPS. -Mac
  16. MacGruber22

    Finite element method book recommendations for concrete

    I have the G.A. Rombach book. It is decent. I also strongly agree with Bones. The user and theory manuals for various concrete-specific FEM software (SAFE, RAM Concept, etc) are a very good since they are focused on practical concrete design. Connecting the dots between the software tools...
  17. MacGruber22

    Revisiting Structural Engineering as a Profession vs Trade (Reboot from 2019)

    Welp, I *was* having a good day today. -Mac
  18. MacGruber22

    Optimizing workflow

    That is a step beyond us. I have beam families with reactions and other things for scheduling and general organizing, but not actual analysis syncing. The most I have done with Python is create a script to add "+/-" onto the suffix of existing dimension strings. Now, I noticed Revit 22 has...
  19. MacGruber22

    Optimizing workflow

    For similar firms as ours (~20 engineers), managing detail libraries/templates with Revit is far easier than in AutoCAD. Not only is it easier to manage and update, it encourages far more uniform drafting and design standards between various engineers, and it reduces errors. Drafting views have...
  20. MacGruber22

    Do You See Any Construction Problems With This Roof Framing?

    Jfklein, heed the warnings. You are being pushy. Further, if you are a registered engineer and take information from this site to make an opinion in the practice of structural engineering (that you are not competent in) related to this building, you are flirting with violating licensing ethics...

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