Welding Members of Different Thicknesses
Welding Members of Different Thicknesses
(OP)
When you are welding together members of significantly different thickness, at what point do you become concerned about stress cracking, lamellar tearing, or any other adverse effects?
For example, let's say I am welding a 1/4" thick member to a 2" thick member with fillet welds in a T-joint connection. Would you be concerned about any adverse effects due to the thickness difference? What if you are welding a 1/4" thick member to a 5" thick member? There must be some limit.
For example, let's say I am welding a 1/4" thick member to a 2" thick member with fillet welds in a T-joint connection. Would you be concerned about any adverse effects due to the thickness difference? What if you are welding a 1/4" thick member to a 5" thick member? There must be some limit.






RE: Welding Members of Different Thicknesses
RE: Welding Members of Different Thicknesses
There are design, detailing, fabrication, and erection considerations that must be applied to avoid problems in highly restrained welded structures. Neglecting any of these steps can cause problems.
I have attached a presentation given by Duane Miller.
http://www.FerrellEngineering.com
RE: Welding Members of Different Thicknesses
Since sometimes some welds fell outside those specifications, resource was made to complete penetration welds with edge preparation, that it was surmised or said, I don't remember, was allowed in all cases. In any case, except for the crack embedded entailment in fillet welds, from a thermal locked stresses viewpoint fillet and complete penetration welds are not too much different, and hence stress relief was sometimes specified, etc, always somewhat disgusting because the somewhat blurry code aspects on this.
When feasible, others divided the plate thickness in component plates to meet the table above.
RE: Welding Members of Different Thicknesses