reply to post by Yankee451
Huh??? First, "steel reinforced" sounds like an intentional misrepresentation....when the reality was the "steel reinforcements" you refer to
were just a few rods of re-bar!
....provide an explanation for the hole in the poured in place, steel reinforced concrete wall ....
Gee....I have you ever seen a house being built?? One with a basement??
They build forms out of wood, and then POUR concrete in....hence, your "poured in place" concrete walls.
KEY to understanding is...HOW THICK is (was) that concrete (vertical) slab??
THREE inches?
FOUR?
FIVE?? (I wonder.....and, what about the re-bar???)
RE-BAR....about one-half inch thick? Or, was it of more substantial diameter? (If so, why?)
NOW.....do you know about
torque? The forces applied that are torsional? Try using a bench-mounted vise, and clamp a length of re-bar
into its jaws. IF you have enough length hanging out, you can use your own weight, and strength (gravity, for the weight of course) to bend that
re-bar....as it is stationed at one end. It is torque, and
leverage!!
NOW....one could, if one wished, use physics to calculate the joules exerted, for any set of examples....JUST form a Human, a vise, and a re-bar
sample, and such. THEN....try, please, to examine the numbers of joules of energy exerted by a massive object IN MOTION....such as the airliner, and
eventually its associated debris, as part of the impact sequence.
This is really, really easy to grasp.......basic of physics, motion momentum.....I would think the vast majoirty of thinking, rational adults can
grasp these understand these basic concepts.......
