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No, I think you understand. The IBC values are presumptive based on soil type and may not adequately depict the in-situ soil. Now that I have information on my soil, I want to use that to determine the actual lateral bearing capacity, rather than use the tabulated presumptive values. See links...

So I have KP given. I have phi, effective unit weight, etc. I just don't quite understand how to turn it into a lateral capacity.

For some backstory - I need to determine required embedment for a bunch of embedded concrete and steel poles subject to lateral load. Ordinarily, I don't have borings for the sites and so I use the presumptive values for lateral bearing pressure given in Table 1806.2 in the FL Building Code (and...

I'm using RISA3D. I've never modeled anything like how you did, though.

Here's a front view.https://files.engineering.com/getfile.aspx?folder=9ab7ee66-fb5c-46f8-bfb7-dcf90a7948f9&file=Front_Sketch.PNG

Hows this?https://files.engineering.com/getfile.aspx?folder=7af9a3d7-c8a3-4fe3-bd27-161771176bb5&file=Side_Sketch_with_Loads.PNG

It's installed on site. See the attached photo for an example of what the structure looks like. It's installed on a monopole cell tower. Adding bolts could work, but I'd still need calcs to prove that the existing stiffeners aren't adding enough capacity to resist the bending in the...

Thanks for the input. The connection is already constructed. I'm running an analysis to see if it needs to be modified or anything. I'll need to back it up with calculations.

I can't for the life of me figure out how to correctly model and analyze this connection. I have a 4x4x3/8 square HSS tube with an 8x8xx1/2" plate fillet welded to the end. This plate is then bolted at the corners to the main structure. I've attached a sketch. Unstiffened, the plate is...