Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations SDETERS on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by hitch22

  1. hitch22

    Bentonite as a Clay Liner Seal

    Thanks for the help and clarification everyone. We should cover the sodium bentonite with a layer of compacted soil.
  2. hitch22

    Bentonite as a Clay Liner Seal

    Yeah I think they could do that as an option. I've never seen that approach. It's interesting.
  3. hitch22

    Bentonite as a Clay Liner Seal

    Hello, We are working on a project which involves installing piles inside a tank compound. The compound has a clay liner as a floor and it has a berm all the way around. Since we'll install piles we'll break the liner and so I would like to seal the area around the piles. On a previous project...
  4. hitch22

    Round HSS Local Yielding

    Buggar, I thought about running a plate through the HSS, but I thought that would be more expensive than using a double plate.
  5. hitch22

    Round HSS Local Yielding

    Thanks for the reply Lomarandi. I attached a link to a sketch of the connection in the original message, but I think you understood regardless.
  6. hitch22

    Round HSS Local Yielding

    Hello fellow engineers, I have a structural problem involving a round HSS which I hope you may help me with. This is the situation. 1. There is an HSS406x9.5 column which will receive moment from a W310x97 as well as an axial load. The factored moment is 229 kN·m and the axial load is 33 kN in...
  7. hitch22

    Passive Pressure and Shallow Octagon Foundation

    The soil is failing under bearing at the toe due to a high eccentricity. For example, e/D=0.36.
  8. hitch22

    Passive Pressure and Shallow Octagon Foundation

    Thanks for the reply KootK. Would you consider any lateral soil resistance even if not passive? For example at-rest?
  9. hitch22

    Passive Pressure and Shallow Octagon Foundation

    Hi fellow engineers, I’m evaluating an existing shallow foundation, please see the attached diagram, and I would like to know if it’s logical to account for passive soil resistance in the “empty + wind” load case. Here is the background: [ul] Octagonal foundation (7’ feet, 7’-10” deep) has...
  10. hitch22

    Partially restrained moment connection pipe support

    Hi fellow members, I'm trying to design a pipe support but I'm not sure how to realistically model my idea. This is the situation: I'm trying to attach an U-shape support underneath an existing platform. Welding is not an option. Due to the width of the existing beam flange, I can only get...
  11. hitch22

    HSS cantilever beam connection

    Hello fellow engineers, I'm trying to design a bolted moment connection between a W-shape column and an HSS cantilever beam. The HSS beam would be connected to the flange of the W-shape. While looking at some books I noticed the HSS was always a column and never a beam. Does anybody know if...
  12. hitch22

    How to Check if Concrete Spalling Reinforcement is needed

    Hi rackookpe1978: CL of plate to edge of concrete? [highlight #FCE94F]12"[/highlight] size of plate? [highlight #FCE94F]1 1/2"x16"x18"[/highlight]exactly what the load bearing steel going down to the plate is shaped (the load won't be centered in the exact center of the plate if it is an angle...
  13. hitch22

    How to Check if Concrete Spalling Reinforcement is needed

    Hi StructDave, No I haven't seen any rebar corrosion. Has the concrete been damaged by freeze-thaw exposure? I think freeze-thaw will make the problem worse since water will fall in the cracks and they should grow. But I don't think freeze-thaw exposure caused this damage. Yes it's possible...
  14. hitch22

    How to Check if Concrete Spalling Reinforcement is needed

    Maybe I should have specified that the load on the steel plate is approximately 99,000 lbs unfactored. The plate is 16" by 18" and it's 1.5" thick. The concrete is assumed to be 3000 psi as this is the value shown on the drawings from 1970.
  15. hitch22

    How to Check if Concrete Spalling Reinforcement is needed

    Hello fellow engineers, I'm trying determine what caused the corners of a concrete support to crack. This is a 40 year old concrete structure supporting a vessel. It looks to me like bearing failure. However, my calculations say only 30% of the concrete bearing capacity is being used. I've...

Part and Inventory Search