Hulsey says both the girder and the column move together. So they don't have any relative motion. He says they both move about 2" away from (approximately) the center of the building.I think this is great. But might I ask you attemept to put your arguments to Gerrycan in a similar way? It seems you are clear there is nothing so hard to grasp about relative motion, so why are you making out that this is such a big thing and has bearing upon Hulsey's claims?
Can you explain it to the layman?
NIST says the girder moves 6.25" relative to the column, and so it fails. They don't say how much either the girder or the column moves away from the center of the building.
Hulsey compares the 6.25" to the 2", but that's the wrong comparison. Since he's saying the girder does not move relative to the column, then the comparison should be 6.25" to 0"
This is significant, because he also seems to have 0" EVERYWHERE, and nobody really thinks that there's zero relative movement between connected parts anywhere in the building.
So his comparison is wrong, and his general finding of 0" is highly suspect.