Recent content by Js5180

Optical98 - Is the gate open in that picture?

Hi All, Not sure if we’ve beat this horse to death yet [deadhorse] but just in case we haven’t, the pic posted up above shows some pretty significant damage at the area of the OSHA hooks, circled: I’m not suggesting there was anything hanging from these, and the slab around them is all...

All About Money, The comment about the dust makes a lot of sense - the area of the “missing parapet” could be interpreted as a dust cloud.

SF Charlie, I can’t argue with that - it has clearly moved between 28 and 33. Looking at the video, it also appears to be present in frame 1, but not on your version of frame one: Source is: https://m.youtube.com/watch?v=KR29pLccutY Any agreement/disagreement?

Well, the choice of that frame was unintentional. But - since you point out the broken band - is it showing any downward movement? Clearly it has some sort of break or damage at a particular spot. Now you have a point of reference - does it descend at all in the time it is visible?

Lionel - those are the upper floors, collapsing mostly inward. White stucco bands are the two vertical white lines:

I haven’t heard the news report on ANY theories. I feel like that’s why most of us are still here. EDIT: For the record, many of us here are laypersons as far as structural engineering goes. We respect your professions. But when you flip to calling everything “wild-eyed” and talking about...

I’m sorry. This is absurd. They were working on the roof that day, and you’re saying a drone strike, meteor strike, or base jumper is more or less equally likely to have happened, compared to something falling from the roof?

It isn’t “wild-eyed” to see that in the video, the upper PH roof slab left/west of the M is missing, and the right/east section is not. You can pull out your thesaurus and throw a few more adjectives around, but I see blue sky, beginning just left of the M column line. That’s a clean break...

Spartan, You say, “Sketch out where this >15’ piece of parapet wall cleaves itself from the building. What’s that weight? What mechanism of failure are you proposing?” Watch the controlled demo video. The parapet over unit 1205-ish clearly “cleaves itself from the building.”...

Spartan, Drone strike? Come on. But again - if the pool slab was so weak to spontaneously collapse, then anything landing on it, driving on it, or looking at it could bring it down. My sequence? I don’t know, actually, but I’m thinking there was cracking (or a construction joint) on the...

Spsalso, I can’t find a good image of the conduit. I’d agree if the wires pulled completely out there’d be no arcing from the conduit. I’d like to see a clear image of the conduit breaks. The best ones I have seen have it bending down, rather than shearing off. Reverse bias, That quote is...

If the upper floors were collapsing, then I’d expect them to be shedding debris. The cantilevered balconies and roof only need to be slightly out of level before debris (including cinder blocks) starts falling off. I’m not saying an AC unit rolled off or anything like that. But if we’re saying...

Nukeman, As blurry as the video is, I have no trouble seeing that the two flashes are two floors apart from each other, and are of a color and brightness inconsistent with any other light source except an electrical arc. Regardless of what floor they were on, or whether they came from a unit...

I have looked through SF Charlie’s frames and I see an issue in the basement-first theory. Not enough to rule it out entirely, but something that doesn’t seem to have been addressed much. In Frames 24-34, the white band on the exterior of the K10/K9.1 column appears not only intact but nearly...