His primary argument is about thermal expansion. Are you claiming aerospace and automotive engineers make no study of thermal expansion? I could see your point if the proposal was about a dirt retaining wall or aqueduct where the other two disciplines wouldn't be well versed in the material's properties, but I am not seeing something CE specific in the thermal expansion of steel.

Yes, “stringer” is also a common word in structural engineering, especially in bridge design, but something that reinforces a tube wall is a stiffener, not a stringer. Update: I am reminded by Matthew Hunt on Twitter that “stringer” is commonly used in aircraft design. I should have remembered that.

Given this quote how do we know they aren't in violent agreement but talking past each other because they are using terms from different disciplines?