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Originally posted by plasmacutter
it was a fortafied build with some beams stronger than wtcs,
Originally posted by plasmacutter
As for the towers normal every day construction could allow blasting chord to be run under floors it was trusses, very easy to run wire all under each floor without raising to many ? , but blasting chord to the lamen would look like cat 5 wire for data
Originally posted by plasmacutter
as far as i know but like i said im now demo guy but from i have reserched about it since ,what i know to be true from working with plate is that that cutt wasnt made at that time with a torch, and as blasting chord from what i know (if experts out there could chime in would be great)as i am no demo expert im just sayin blasting chord has a range from 1000 psi to around 5 million psi ,now as for what was used i have no clue but. I have seen what 1.2 million psi can do to concrete and what 2.0 million can do to 2 inch plate, as for 4 inch no, i only know what a cutting torch ,welder (tig,mig,stick) and a gouger can do. But if 1.2 million psi can cutt threw 2.0 inch steel like butter i asume since i have not done the math 2.4 million psi could cutt threw 4 inch but u may need 4.8 im not an scientist but. I will give u this if it was done at that moment and they did move all the gear that fast and not the rubble , i can teach them a few clean up skills to make thos cutts easyer talking about being tired on a ladder cutting that 4 inch plate by hand would take a good 20 min to cutt it all the way around and im being nice about 20 min And man that line would have been hanging around ineck to help suport the weight of the lines they would have been a 100 foot long and weigh about 30 pounds , but if u think so .Those guys are bad ass(cough maybe thats why it looks so rough and not very profesional done) because it was done from a ladder . like i said im just saying looks fishy to me . i was gona mention that the buildings where progressive steel building. The very bottom started out at 6 inch think and got thiner as it got taller 1/4 inch at the top .So the building was lighter as each floor went up the top floor was alot lighter then the floor below, and thus less energy when crashing into a stronger floor below it.So as it got stronger on the way down where did the extra energy come from to excelerate the floors as they would have progresively got slower and the progresivly stronger floors would have absorbd then energy from floor above im just saying the buildins was desighnd to hold its self up
[edit on 18-3-2008 by plasmacutter]
Originally posted by Spaxz
The debate between you two is good though, but unless you were the one who was acually there you'll never know for sure what happened.
Originally posted by plasmacutter
Man i am truely sorry to all i will edit my post very very sorry . sorry for making u guys try to read that like i said i suck at spelling and punctuation. But brb ill edit it
Originally posted by jfj123
Assuming what you're saying is true, why not ask them.
Because, prior to collapse, WTC 7 did not suffer any high-strain rate events, NIST made no effort to estimate high-strain-rate or impact properties of the steel.
No metallography could be carried out because no steel was recovered from WTC 7.