Thanks guys for the better videos
the clarity of this one linked by Gwideman and MikeW7 is a comfort to me. Looks as if it's close to the source. Even shows the reflection of his coffee mug in the windshield...
https://www.youtube.com/watch?v=jzbfJF5iVpI
Even shows the "Mystery Projectile"...
sure seems plausible . At the instant of that frame you posted, the tendon hadn't yet unzippered from #11 . As the deck continued down with #11's bottom hung atop pylon, it ripped the tendon out straightening rebar as seen in NTSB pictures ?
Holding that thought to see if it...
Wow - that one sure makes the mysterious 'bulge' or 'puff' look more like a definite breakout.
That link Dilbert gave points to DailyMail , which appears to be a copy of a youtube by one 'officialjoelf'
Here's the youtube "officialjoelf" version which is clearer yet. I wonder were he got...
One last question from this beginner ?
just thinking aloud because i'm not qualified to assert anything about concrete.
Happy to see questioning the sequence of tensioning.
Tensioning the deck and canopy separately i would think changes their relative lengths by elastic compression . That...
I've been having a difficult time letting go of that image of #11's lower tensioning rod protruding out the top with jack still attached. I thought surely it'd snapped as suggested by the Youtube "Smoking Gun" guy but finally realized that is likely a red herring.
Ingenuity's image above...
Noob question from a non-Civil engineer... (non-Civil discipline as opposed to un-Civil demeanor)
IF a tendon snapped, say that one with jack attached that's protruding from the blister;
THEN would an impulse result as the member elastically expands upon sudden reduction in compressive force...
Looks like the dashcam vehicle was slowed to a crawl. The viewing angle didn't change enough in the 0.16 seconds to create that illusion. Even at 10mph, 0.16 sec is just 2 ft 4 inches.
old jim
