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  1. ETX

    SEISMIC REACTION FOR A GRAIN BIN

    No need to be a jerk human909. ntattose: Check out a book titled Structural Engineering Handbook by Gaylord and Gaylord. Chapter 23 has a section on bins and discusses the forces and stress evaluation for bins. Blodgett's Design of Welded Structures Section 6.5 also discusses bins. Hope that helps
  2. ETX

    Mill reports for redesign

    The AISC code is clear that the design strength is based upon the specified minimum yield stress of the steel type used. The safety implication of using CMTR values is the reduction in the AISC factor of safety or safety margin.
  3. ETX

    Unbraced Length for Column with Intermittent Loading

    Try this. A similar question was addressed in the 2010 fourth quarter engineering journal. See attached. https://files.engineering.com/getfile.aspx?folder=0b84ef58-f029-41c9-8a57-6828e863255c&file=Unstrutted_Pipe_Racks.pdf
  4. ETX

    Pipe Hanger Load Rating

    I would calculate the load it takes to elastically yield each horizontal tab on the collar via a cantilever beam bending analysis and call that the limiting factor in design. The capacity of the support is then 85% of twice the load required to elastically yield a single tab. 85% is to account...
  5. ETX

    Angle Iron Capacity - Hanging Crane

    AISC Design Examples v15.0https://files.engineering.com/getfile.aspx?folder=f391e25f-fab0-4730-afc2-920a3dceccf2&file=aisc-design-examples-v15.pdf
  6. ETX

    Angle Iron Capacity - Hanging Crane

    AISC Steel Construction Manual, 16th edition. Page 16.1-68
  7. ETX

    Single Story All HSS moment frame

    @StrEng007: If talking anchor bolts, if we can assume the two connection methods provide the same stiffness and rigidity, then the forces in the anchor bolts should be the same. The forces in the connection bolts likely differ as the orientations and axis of loading is different, but the overall...
  8. ETX

    Grating Analysis

    Unless you are rigidly connecting the two sections via welds, clamps, bolting, etc. then you cannot combine the section modulus for the built-up section. The built-up section has to be connected to transfer the shear flow and stresses to extreme fiber if you are going to credit the combined...
  9. ETX

    Girder Analysis Varying in Cross Section Made of Pin-Connected Elements

    Agent666, here is the situation. I work at a chemical plant and we have a lift coming up where we have reached out to a vendor for assistance. They are putting up what can be best described as a portable gantry crane. For shipping requirements, they are not using a single girder member, but are...
  10. ETX

    Girder Analysis Varying in Cross Section Made of Pin-Connected Elements

    Thank you all very much. I agree, deflection will need to be checked also and I will probably use the conjugate beam method like you mentioned Celt83. JAE, the "fingers" are welded to the top and bottom flange (resembles a built-up girder). All connecting plates with pin-eyes are of the same...
  11. ETX

    Girder Analysis Varying in Cross Section Made of Pin-Connected Elements

    Would like a quick sanity check on my analysis approach for a long span girder made up of shorter pin-connected elements. I won't go into the details, but instead of using a single, prismatic girder, a smaller sized girder and a larger sized girder are pin connected to each other using...
  12. ETX

    Deadmen Anchor Analysis - Tower Structures

    Does anyone know of a good reference for analyzing deadmen anchors used to support tower structures?

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