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  • Users: kaffy
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  1. kaffy

    Regarding expanded metal sheets

    @Stick. Awesome. Thank you very much! Would you mind sharing the name of the manufacturer you worked with who provided the load and span tables? I’ve reached out to a couple of vendors but haven’t received any response so far.
  2. kaffy

    Regarding expanded metal sheets

    @duckhawk This is exactly what I’m planning to do. I was wondering — what kind of design guides or tables did you reference to determine the support spacing?
  3. kaffy

    Regarding expanded metal sheets

    Good afternoon, I hope you are well. For one of the catwalk / maintenance platform application, I am considering using expanded metal sheet (attached PDF). I’ve done some research but haven’t found much information on the design of expanded metal. I was wondering if there are any design guides...
  4. kaffy

    Regarding Beam sizing for Heavy duty trailer

    By “ultimate capacity,” do you mean I should model the spring as extremely rigid in order to capture the maximum possible reaction load?? Just to clarify, we are only specifying the axles—not designing them.
  5. kaffy

    Regarding Beam sizing for Heavy duty trailer

    Good Morning, I hope everyone is well. I am currently working on a trailer design project and specifying the beam and axle sizes. Based on my free body diagram, the configuration includes a long beam with a fixed support at one end and three roller supports positioned along its span (FBD as...
  6. kaffy

    Pipe Clamp Connection

    Good Evening, I hope you're doing well. For my project, I am looking to connect two hydraulic cylinders (3-inch OD) with a 16-inch OD flange, as shown in the attachment. The clamps are intended only for lateral bracing of cylinders, as the face plate at the top of the cylinder is connected to a...
  7. kaffy

    Continuous beam on multiple closely spaced rollers

    Thank you very much. One last question: I understand that every connection is unique and will have a different stiffness value, but are there any standard reference values or general guidelines to use for those situations?
  8. kaffy

    Continuous beam on multiple closely spaced rollers

    Good Morning Fellow Engineers, I have a beam with multiple closely spaced roller supports (shown only 4 in attached pdf but I have 12 in total) and a cantilever at one end. Design intent is to move the beam on rollers with hydraulic cylinder on one end. When I try to calculate the reaction...
  9. kaffy

    Stiffener & Doubler weld

    Thank you very much. Just the information I was looking for. Are those requirements in AISC?
  10. kaffy

    Stiffener & Doubler weld

    Actually, I shouldn’t say "a lot of welding." I have a 45-foot-long W40x324 beam with four doublers (two at each corner, 1 on each side of web) and 26 stiffeners (13 on each side of the web).
  11. kaffy

    Stiffener & Doubler weld

    Good Morning Fellow Engineers, I'm working on a project with multiple full-length transverse stiffeners & doublers welded along the beam. Original Plan was to weld continuously on all sides—across both flanges and the web. However, I'm concerned about potential warping due to the extensive...
  12. kaffy

    Regarding UMHW Pad sizing

    Good Morning, I hope you are well. I am working on sizing an isolation UMHW pad that will be placed below a beam subjected to a load of 250 kips (as shown in attached PDF). Based on the triangular load distribution principle, I expect the load to be distributed over a certain area. My original...
  13. kaffy

    Regarding Isolation pad

    Good Morning, I hope you are well. I am working on sizing an isolation UMHW pad that will be placed below a beam subjected to a load of 250 kips (as shown in attached PDF). Based on the triangular load distribution principle, I expect the load to be distributed over a certain area. My original...
  14. kaffy

    Regarding Overhead Beam Capacity Tag

    Good Morning Fellow Engineers, For the overhead beam, I’ve been asked to provide a rated load tag. I plan to base the rating on CMAA guidelines, as using a beam trolley or clamp attached to the bottom flange and concentrated load on the middle likely represents the worst-case loading scenario...
  15. kaffy

    Regarding Bracing for lateral torsional Buckling

    Good Morning Fellow Engineers, (File attached) For calculating the lateral-torsional buckling bracing, AISC Appendix 6 specifies minimum requirements for both flexural strength about the longitudinal axis and flexural stiffness. - Yura provides the formulation for calculating the stiffness...
  16. kaffy

    Regarding Lateral Torsional Buckling Bracing

    Thank you very much for the response kootk - I am using fundamentals of beam bracing as reference (page 10/16) - I am planning to have multiple diaphragm (2 on the ends & then approx. 9 ft apart). - By cross brace diaphragm, do u mean W beam as cross brace or any other k or x frame? - I can not...
  17. kaffy

    Regarding lateral torsional buckling bracing

    The span is 45 feet. I think you're referring to system buckling, where both elements buckle simultaneously and behave as a single unit. Is that correct?
  18. kaffy

    Regarding Lateral Torsional Buckling Bracing

    Good Morning Fellow Engineers, I am working on a structure with two W40x324 beams spaced 10 feet apart, each carrying a concentrated load of 150 kips at mid-span on the top flange (attached file showing AISC, YURA reference and loading condition) . My goal is to prevent lateral-torsional...
  19. kaffy

    Regarding lateral torsional buckling bracing

    Good Morning Fellow Engineers, I am working on a structure with two W40x324 beams spaced 10 feet apart, each carrying a concentrated load of 150 kips at mid-span on the top flange (attached showing AISC, YURA reference and loading condition) . My goal is to prevent lateral-torsional buckling...
  20. kaffy

    FEA on Bolted Joint to determine the reaction loads

    Total Load (vertical) = weight of machine + suspended load = F1 Seismic Load (horizontal) = Coefficient of seismic force * (Weight of machine + suspended load) (coefficient of seismic force is calculated based on site conditions and building codes) = F2 I understand that I should be using...

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