Fillet weld capacity on thin base material
Fillet weld capacity on thin base material
(OP)
I am designing a welded steel truss made of round tubes (chords are RMT 2.875x0.120 and the webs are RMT 2.0x0.083). I would normally start with a weld equal to the thinnest base material, but I need the capacity of a 3/16" fillet weld (all around the ends of the webs) to resist the end moments. I am used to designing with thicker material and therefore have the following questions:
Can I design for (and specify) a 3/16" weld in this scenario?
I know the web section (RMT 2.0x0.083) by itself can resist the end moment, but would such a large weld somehow affect its capacity?
Fatigue is not a concern. I attached a rendering if that helps clarify the situation.
I would greatly appreciate any constructive feedback.
Can I design for (and specify) a 3/16" weld in this scenario?
I know the web section (RMT 2.0x0.083) by itself can resist the end moment, but would such a large weld somehow affect its capacity?
Fatigue is not a concern. I attached a rendering if that helps clarify the situation.
I would greatly appreciate any constructive feedback.





RE: Fillet weld capacity on thin base material
I don't understand why you need 3/16" fillet for 1/12" thick material. I would try full strength butt welds using backup rings.
Timing has a lot to do with the outcome of a rain dance.
RE: Fillet weld capacity on thin base material
similar to double/triple butted tubing used in bicycle frames.
single wall as shown, yes, possible, but in at least 2 passes, maybe 3
RE: Fillet weld capacity on thin base material
Designed for looks and then asked to carry a load.
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Plymouth Tube