The case of WTC 7 does not lend itself to any thesis that supposed demolitions rigging occurred during slack times when few people were around. Such construction would not only have to take into account the floors continuously manned, but would also have to somehow not be noticible on those floors. And that is the whole point of bringing up the absurdity of claiming that demolitions construction work was done in the weeks to months prior to 9/11. Very simply put, no one noticed any such work being done. And there were too many people present to not have noticed any such work.
Right. And I swear that most (if not all) CD CTists have a vision of the core areas being one giant, dark void with core columns scattered around. And that MiB could swing - Tarzan-like - back+forth attaching magnetic demolition packs here and there.
In fact the core columns were all lined with fireproofing and many covered to varying degrees in heavyweight dry-walling. They bordered offices, restrooms, corridors, stairways, storage areas etc etc.
Removing the drywalling would in itself be a monstrous job. It was heavy :
And it was extensive :
And then we have to consider the fact that CD requires pairs (or multiples) of opposite charges operating together to cut the steel, and that columns are typically pre-weakened with torches to reduce the column strength and ensure effective demolition:
Attaching some kind of CD package would then make the replacement of the drywalling impossible (see pic 1 above). That's even allowing for the distant possibility of getting unobserved access to the necessary columns for sufficient time to even try.
And - note well - the guys in the photo above are working in a totally stripped-down building. Even then it takes months to rig a CD.
In short, the whole concept is absurd. Not a very scientific word, I know, but demonstrably and palpably
absurd it remains. You can just about smell the absurdity.