Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

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

Search results for query: *

  1. apetr26542

    Combining Steel Moment Frame & CMU Shear Walls

    If you can make a 3D model as suggested in Risa Or advance, you could change the properties of the wall rather easily, E'm that is. I think you will find when a moment frame shares load with a shear wall, don't expect much contibution from the moment frame. I would also expect such a lopside...
  2. apetr26542

    Bending Stress in Circular weld

    Welding of a circular pipe to a flat plate where the pipe is in pure bending. I've seen the weld stress calculated as M/Sw M=moment Sw=circular property of the weld Is this the Section properties of that of a circular ring, with the effective throat being the thickness of the ring?
  3. apetr26542

    Using European Steel in the US

    My thinking is our loads in accordance with their stresses and design manual for their steel. I've seen others post about finding an equivalent ASTM steel. I suppose you could do that and then run the design through the AISC manual. I could see the latter causing conflicts, but I might rely on...
  4. apetr26542

    Using European Steel in the US

    Contacted by an Italian firm to oversee their design. They want to use European steel in the US. We will have to ensure the structure meets our codes. Is this permitted? Any one come across this situation before?
  5. apetr26542

    Looking for Hard data on drag coefficents

    I am curious as to the relationship of drag coefficient and speed for a vehicle. I calculated an object moveing at 55mph having a Reynolds of 3.2*10^6. I think this puts it beyong the transition where drag coefficient drops significantly. However at 10mph it is before this transition. But I've...
  6. apetr26542

    Pre 1920 Building Codes

    Update: did find a refernece to a "New York City Building Code of 1917", trying to obtain this though. I also found a reference to a "Detailed assesment of Moment frame elements with Masonry Infill Panels"
  7. apetr26542

    Pre 1920 Building Codes

    I am interested in this as we are doing work on an existing 1914 building, The NYS building code for existing buildings merely states that the structure shall be capable of supporting loads at the time or era. Unless you make modifications that increase the stresses by more than 5%. Something...
  8. apetr26542

    Steel Frame With CMU Infill Wall Bracing Condition

    We've designed buildings that were Moment frame, but had exterior brick and CMU, this could be the architects choice, I believe the recommended displacemnt for masonry is H/600. The CMU enclosure, if properly connected, could be incorporated into a shearwall system, the steel frame may allow...
  9. apetr26542

    Good Frame Analysis Software?

    I've used Risa 3d from 1 story to a 10 story building, It does give you much design freedom.
  10. apetr26542

    Cracks in Foundation Wall

    I did an inspection of a residential home, had a good size crack in the wall, the home owner had filled it with silicone. The wall closed up and sqeezed it out over time. Just so you know. Every residential concrete foundation I've seen has always had cracks. Is there any reinforcing steel in...
  11. apetr26542

    Cracks in Foundation Wall

    Spacing of these cracks?How wide? How much is uneveness at floor? You mentioned the opposite wall has one also, does this crack go end to end? Could be settlement, some settlement is natural. The steps in the wall created a discontinuity and likely started out as shrinkage cracks. The crack was...
  12. apetr26542

    Curtain Wall Deflection

    Usually L/600 is reserved for masonry or veneer, curtain wall, L/360 should be adequate, however they might have criterion to follow.
  13. apetr26542

    Balcony brackets...connection design??

    tjacorn, yes, essentially this would requre the brackets be let into the wall, just what is trying to be avoided.
  14. apetr26542

    Damaged Column

    Obviously the flange was torqued, after it is straigntend they could also weld in some flange stiffeners, I also like the concrete encasment idea, they could weld some studs to the column to grab, not sure how the load path would work to the foundation.
  15. apetr26542

    Damaged Column

    When welding cover plates, consider the column has compression stresses in it, and the cover plate you are welding does not, AWS recomends stresses be less than 3 ksi. If you are over this, you must incorporate this into your repair or remove the stresses. I would go for heat straightening...
  16. apetr26542

    Shallow footing design

    jheidt2543, thats a great point, Next time I get a prefab building, I will make sure the foundations can take the DL thrust and see what kind of FS I have.
  17. apetr26542

    Framing @ Rooftop Unit Openings

    Usually just call for the framing around the unit if the openings for the unit are contained within this frame, other wise it is any opening >12".
  18. apetr26542

    Design of concrete walls

    Thats what I thought, but this always made me curious. Thank you
  19. apetr26542

    When the Contractor and Architect go over your head

    We all went to the site, met with contractor, erector and architect. Turns out, where the drawings call for a bond beam, there is none, so we are adding more sleeve anchors. The fabricator put on an end plate big enough to accomodate this. It corroborated what I was doing. I did not turn over...
  20. apetr26542

    Design of concrete walls

    Not that this is a specific design. I don't get into concrete design too much but some. When designing concrete walls under flexure, how would one design and detail shear reinforcing. ACI 318 ch.14 references you ch. 11 which discusses stirrups, bent bars. Other than thickening the wall?

Part and Inventory Search

Back
Top