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  1. shesanEIT

    Design of Shear Key Using ACI-318 Anchorage

    Do you mean an embedded plate at the bottom of the anchor group? I understand that would help pullout, but how does that help the concrete breakout in tension condition (governing)?
  2. shesanEIT

    Design of Shear Key Using ACI-318 Anchorage

    Hi all, My problem and question stated below: I have applied loads of 500kip uplift and 100 kip horizontal onto a 3' x 3' x 3.5' tall pedestal hooked into a 5.5 foot mat foundation. I have 12 - 1.5" diameter bolts arranged in a 4x4 bolt pattern with 8 inch spacing between bolts. The...
  3. shesanEIT

    High Elevation Walkway Connections

    Aha, thank you @hokie66.
  4. shesanEIT

    High Elevation Walkway Connections

    Thanks very much for the details @SlideRuleEra. Seems like a simple solution!
  5. shesanEIT

    High Elevation Walkway Connections

    Thanks @hokie66 Are you suggesting the other end be free to allow for twist and lifting? Guided slide bearings only allow for movement in one direction, correct?
  6. shesanEIT

    High Elevation Walkway Connections

    I am working on a high elevation platform/walkway connecting two vessels. I am looking for examples, input, or advise on the best connections for the job. For different elevation platforms I've seen stairs hinged at the top, then free at the bottom to allow for twist, sway, etc. however, the...
  7. shesanEIT

    Anchors: Threaded Rod vs. Headed Bolt

    ACI318-14: headed stud - a steel anchor conforming to the requirements of AWS D1.1 and affixed to a plate or similar steel attachment by the stud arc welding process before casting, also referred to as a welded headed stud.
  8. shesanEIT

    Anchors: Threaded Rod vs. Headed Bolt

    Once20036 thanks for the link. So I guess really the answer is it's not prohibited by the code, but not recommended by some. CARunderscore, I agree.
  9. shesanEIT

    Anchors: Threaded Rod vs. Headed Bolt

    Thanks @TehMightyEngineer, I appreciate your answer. This is what sparked my research: http://www.portlandbolt.com/technical/faqs/headed-anchor-bolts-vs-rod-nut/
  10. shesanEIT

    Anchors: Threaded Rod vs. Headed Bolt

    Definitions from ACI 318-14: Anchor – Steel element either cast into concrete or post-installed into hardened concrete used to transmit loads Cast in Anchor - is only a headed bolt, headed stud, or hooked bolt. Post-Installed Anchor – expansion anchors, undercut anchors, adhesive anchors...
  11. shesanEIT

    Structural Effects of a Lightning Strike

    Interesting approach, I will take a look at those codes. Thanks for the reference!
  12. shesanEIT

    Structural Effects of a Lightning Strike

    Thanks for the help folks [thumbsup2]
  13. shesanEIT

    Structural Effects of a Lightning Strike

    Does load factoring take this as an extreme event like seismic?
  14. shesanEIT

    Structural Effects of a Lightning Strike

    Thanks @TehMightyEngineer. "When lightning strikes a lightning rod, a large lightning current flows into the ground through the lightning rod conduction wires and the steel framework of the building."...wonder what would happen to the steel structure if there was no lightning rod?
  15. shesanEIT

    Structural Effects of a Lightning Strike

    Thank you @Lomarandil,that sounds pretty close. I found an equation for the short circuit force in substation bus structures and will apply it to approximate.
  16. shesanEIT

    Structural Effects of a Lightning Strike

    Thanks @TehMightyEngineer
  17. shesanEIT

    Structural Effects of a Lightning Strike

    Does a lightning strike apply any additional forces to a structure? I have done some research on this and have come across: "Any conductor carrying lightning current will be subject to an electromagnetic force F=Bli in Newtons." B = the component of the magnetic field at right angles to the...

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