Just wondering, could some gussets be added in where the tubes don't meet at the nodes and resolve/improve the issue without taking the frame apart and rebuilding it? What do you engineering types think?
I think it has to be figured on a case by case. My experience is only static loading (ie structural) not dynamic loading. So I kinda tend towards taking the maximum dynamic load and looking at it as the base static load.
But the key is that the forces at the node need to be balanced. If a load is introduced near a node, say 4" from the node, that load introduces a moment force at the node, as well as a bending force on the supporting member. (this would probably more significant on round tube than square) In the case of a welded connection at the node, the welds are put into more tension (and compression) than would be normal. Weld penetration would become more crucial here. Sooooooo if you can overcome those challenges..... I think I'd still cut it apart and redesign.