Another possible intrepretation is that these are budles of old fashioned telephone (and possibly telegraph) cables. There were risers for such in the corners of at least WTC 1, known from the 1975(?) fire.
Fair. But leading to where? From where? We can all agree that these would naturally be run up through core shafts to centralized junction locations. What hollow shafts near the corners could possibly be used?
I'm pretty familiar with how bundles are run and junctioned, pretty much always following a rather sensible and useful, centralized route.
Hambone asks:
Is it necessarily failing trusses or could it be failure at the truss connections (i.e. bolts) ?
That is what I would think, too. NIST catagorizes them but doesn't specify their locations. The video they use to do this is apparently "top secret". Little people like ourselves are not able to see it.
The one example Max posted earlier shows multiple "puffs" from the same corner the molten something was pouring out of.
A molten something interpreted as ....lead from storage batteries?
Multiple white tubes interpreted as...flooring?
Multiple puffs? And then, later, WTC 7 kind of "falls down".
And people like myself are considered "fringe" or "looney" for questioning such BS?
(And war plans already prepared before the event.)
These smoke puffs could be studied effectively if I had access to the video that NIST does.
Access denied.