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  1. DAVE9999

    Using ground floor slab for horizontal forces

    Thanks, I'll stick to what I normally do and use grade beams if necessary to share the load to other footings
  2. DAVE9999

    Using ground floor slab for horizontal forces

    Can you use a ground floor slab to take horizontal forces from columns? Instead of relying on spread footers to resist sliding. Typically I have not because the slab is placed with expansion joints around the columns but I was curious what others do
  3. DAVE9999

    Excel VBA Code Request

    this line needed a slight change so it would work: lRow = xl.Match(CLng(CDate(Cells(1, 1).Value)), Sheet2.Columns(1), 0) I attached an updated file that should work for you https://files.engineering.com/getfile.aspx?folder=8c99ddb2-7c5f-4416-87f4-239501f45236&file=Copy_of_Timesheet-test.xlsm
  4. DAVE9999

    Slip-Critical Connections in Seismic Regions

    "you've basically got a slip-critical connection with all its associated cost impacts", this is not accurate. I'm not trying to be a pain but a bearing connection has about 40% more capacity than a slip critical one in shear. You will use a lot more bolts with slip critical, hence the added cost.
  5. DAVE9999

    Slip-Critical Connections in Seismic Regions

    AISC 341 does not require slip critical connections, the bolts can be designed as bearing type connections but the faying surfaces must meet the requirements for a class A slip critical connection and the bolts must be pretensioned (see 341-05 C7.2 and 341-10 D2.4).
  6. DAVE9999

    Story drifts from STAAD with dynamic analysis

    Thanks, you mention elastic drifts but this is for a dynamic (or modal) analysis
  7. DAVE9999

    Story drifts from STAAD with dynamic analysis

    How do you obtain story drifts from STAAD with a dynamic analysis? Should you use the node displacements? Or the PRINT STORY DRIFT command? And do you need to factor up displacements Cd/I (see ASCE 7-05 12.9.2) Thanks
  8. DAVE9999

    Is the Ultimate strength of ASTM F1554 Grade 55 anchor rods 75ksi?

    I'm looking for the futa value in ACI 318-08 App. D.5.1.2, 75ksi?? Thanks
  9. DAVE9999

    SE Exam II - Concrete Reference

    Don't bother, you won't need it.
  10. DAVE9999

    Torsion - AISC Design Guide 9 Formulas for Graphs?

    I get the 'page cannot be found' window when i try uploading but i got it working now (thanks HeeeyDave), i was mixing up location of the torque and the location of the stresses thank you (again) for your help, hopefully i will have this working now
  11. DAVE9999

    Torsion - AISC Design Guide 9 Formulas for Graphs?

    i couldn't get the file upload to work, i have a pdf of my mathcad file and when i hit upload it wouldn't work i was getting the same formula you had for ?'and I agree, ?' shouldn't be zero from the graphs your formula for ?' looks like it would be zero when z=0, what do you get for ?' when z=0?
  12. DAVE9999

    Torsion - AISC Design Guide 9 Formulas for Graphs?

    That is strange why your posts are deleted. I agree, if someone is deleting it, they should explain why, that is poor communication! Thanks for posting the solution. I agree with the solution but when z=0, I get ?'=0 (on paper and in mathcad) and that doesn't match up with what you show on page...
  13. DAVE9999

    Torsion - AISC Design Guide 9 Formulas for Graphs?

    Still working on this, does anyone have the formulas for the derivatives of ? to get ?', ?'' and ?''' for Case 3 (pin-pin, concentrated torque) ?
  14. DAVE9999

    Torsion - AISC Design Guide 9 Formulas for Graphs?

    Thank you for the help! I will give it a shot and if it doesn't work I'll resort to looking up the values from the charts
  15. DAVE9999

    Torsion - AISC Design Guide 9 Formulas for Graphs?

    I am working on a Mathcad file for calculating torsional stresses. Looking at AISC Design Guide 9, is there a way to calculate the values in the graphs in Appendix B instead of looking at the graph to come up with the values? Thank you
  16. DAVE9999

    Books allowed for SE Exam

    That helps, thanks!
  17. DAVE9999

    Books allowed for SE Exam

    Thanks, is there a guideline that spells this out?
  18. DAVE9999

    Books allowed for SE Exam

    Does anyone who has taken the SE I and II exams know if you can bring the Sructural Engineering Reference Manual to the exams? (ISBN: 978-159126-119-3) It is an open book exam but I understand there are some limitations as well. Any help with this is appreciated.
  19. DAVE9999

    Effective length for out of plane pipe bent column

    Pipe bent consists of two columns with three beams (moment connections) between columns. Out of plane it is free (no bracing or tie backs). What is the K factor out of plane? Should I use K=2 like a cantilever or can it be reduced? Thanks for the help
  20. DAVE9999

    IBC 2003 1605.4 Special Seismic Combinations

    The vertical bracing shifts inward below the 2nd level creating the discontinuity, therefore the columns below the discontinuity are subject to the special seismic combinations (if I am interpreting the code correctly). IBC 2003 1620.2.9 states: "Columns or other elements subject to vertical...

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