I've haven't been to the island either.Been as far as corpus christi. Hope it's nicer than houston ,to much pollution/smog from the shipping ports ,I guess .Doesn't matter , not getting in the water (the ocean is not a good place to be when you're made of meat) but walking the shoreline is always interesting.<quoted text>
Nice! Still haven't made it to the padre Islands, maybe this year!
And what I meant had nothing to do with the term"free fall" but the implication that free fall=controlled demolition.
Simply put, if fire can cause structural failure (and there's no doubt it can), then it can cause free fall and global collapse of a structure given the right conditions.
The fact that fires burned for hours and the design incorporated the need to build over an existing structure were inclusive if those conditions.
I personally don't give a shit about "free fall" . It is a distraction from the root cause(d.o.d. and money ) but I don't get how all four walls could "collapse" simultaneously . Not just once but three times that day.
Ok ,I agree, fires can cause structural failure .Yet,the conditions for producing enough heat for the core columns or even the rivets / bolts 20 or 30 levels below the initial impact to essentially provide zero resistance and all fail in unison in the correct order to negate tipping the tower to one side or the other are highly improbable.
if you put an opened aluminum can in a preheated 1100 degree oven providing a uniform heat source for weakening but not quite hot enough to melt the can, which is more than the towers had ,would the can collapse straight down or possibly tilt the top to one side or the other upon collapse initiation ? I'm only guessing but the side with the tab on it should start the sequence because of the weight .
The planes caused the towers to sway probably 10 to 15 feet
upon impact add the weight of remains of plane to impact side and I'm sure the structure would favor impact side.
Wouldn't this cause the buildings to fall like a tree instead of collapse in on itself?