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  • Users: kaffy
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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. kaffy

    FEA on Bolted Joint to determine the reaction loads

    Good Morning Fellow Engineers, I am trying to determine the generated reaction loads at bolted joints when a horizontal force acts on center of gravity of machine (Seismic Loads). My original Intent was to use the following approach -Create a coordinate system at COG of machine -Create a...
  13. kaffy

    Simulate bolted connection fixture

    Good morning fellow engineers, I hope you are doing well 1st: I am trying to simulate a fixture as shown in attached file. Eventually I would like to find reaction loads / moment at fixture and thus selecting isolator based on that. Any ideas on how I should proceed? 2nd: Is it possible to use...
  14. kaffy

    Professional Engineer Stamp

    Good Evening fellow engineers, I have recently received my engineering stamp and am curious about liability issues while stamping the layout drawings. I work with an elevator contractor. In the first phase, we usually issue the layout drawings showing the technical data table, plan view &...
  15. kaffy

    Jib crane swivel joint

    Good evening fellow engineers, I am looking for information regarding the swivel joint marked up in attached PDF. Is it just a hollow pipe with bolt going through it? or is it usually a pin inside a bearing and further enclosed inside pipe? Any information or breakdown of that joint will be...
  16. kaffy

    slot length

    Good Evening fellow engineers, I am looking for some information about the slot length. I understand that CISC/AISC has tables which set a limit on length of slots. However, I see a lot of parts by different suppliers (sheet metals, steel plates, angle etc.) with really long slots. Having a...
  17. kaffy

    Mono Rail attachment to ceiling with expansion anchors

    Good evening fellow engineers, I am working on a project where I need to provide a 6' long beam with a capacity of 1 tonne (short load duration). As a beam trolley will be used on the beam, I will be following CMAA. The beam will be attached to ceiling(8in concrete) with post installed anchors...
  18. kaffy

    Thick Steel Plate (10" x 13" x 3/4") Under load (about 12000 lb in total)

    Hello guys, I am designing a steel plate (which will be welded on all four sides) and load will be acting at 8 location (uniform load acting over a small circular area, represented by the blue circles). I was planning to use Roark's formula 8b (also shown in attached file) but it only works...
  19. kaffy

    Stacking the steel plates

    Good morning guys, what are the best practice while adding shims? In my case, I have a beam structure which will be sitting on HSS. I have to raise the structure by 2in. I could add additional plates (holes in center of plates and then plug welds) but I would like to know how does experienced...
  20. kaffy

    Weld under eccentric out of plane loading

    Good Morning fellow engineers, I am working on a project where I have a fillet weld under eccentric loading as shown in attached file. Initially I was following https://www.roymech.co.uk/Useful_Tables/Form/Weld_... and doing my calculations based on that (calculate direct and secondary shear...

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