How do I design a weld for stiffening a beam?
How do I design a weld for stiffening a beam?
(OP)
I have a beam (tube) where I'm welding a smaller tube to the bottom to stiffen it up. Does anyone have any good resources explaining the method of designing the weld?
Thanks!
Thanks!






RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
I don't mean to criticize, but I could not resist. You have a fellow engineer who is probably trying to design something that he has not designed before. It is our role, as a group of engineers with a variety of experience and skill set, to help him/her understand the mechanics of the problem.
We do not know what kind of loads we are dealing with or any detail regarding the problem. Just saying weld a few feet and it will be fine is a bad response. We all try to set really high standards in the forum. I am sure you understand.
RE: How do I design a weld for stiffening a beam?
Zstruct- your question is too vague, we need a sketch of your configuration, show us the supports and the loads.
RE: How do I design a weld for stiffening a beam?
I'm capable of designing the skip-weld once I determine my loads. I've done this before, but it was a long time ago, and I can't remember the shear flow procedure. Is it as simple as determining the shear/ft along the "joint" (where the two tubes meet), and designing the weld for that force? If so, I need to refresh my memory on how to calculate that force.
As for a sketch, just picture a 12X4 tube, 20' long, with a 20' long 4X4 welded to the bottom of it along its length.
Thanks in advance for the help!
RE: How do I design a weld for stiffening a beam?
you may use this excel as a reference
just like everybody said it's about horizontal shear.
RE: How do I design a weld for stiffening a beam?
You should really look into obtaining a mech of materails text. It will be a valueable asset through out your career. Particulary it will be of value for this issue.
As for now, find someone with a mech of materials text and look into shear flow.
RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
RE: How do I design a weld for stiffening a beam?
Slickdeals - thank you for your calc! that was above and beyond the call of duty. That does make it as simple as I was hoping it might be, and you answered my question completely.....that is until I read the next post about anchorage shear
engotengot - Is this a different "animal" altogether, or are the "anchorage forces" merely the larger shear forces near the ends? i.e. are you saying I might have 2 feet of continuous weld at the ends at the highest shear, and then skip weld between the two 2' welds at the ends?
Thanks everybody for your help. I REALLY appreciate it!
RE: How do I design a weld for stiffening a beam?
If the stiffener stops short then these forces need to be transferred somehow.
RE: How do I design a weld for stiffening a beam?
aside from the calculation of the interior stitch weld.
you dont usually add bottom reinforcement from support to support but only on location maximum moment where existing fail.