Psikey is an engineer? Engineers would not waste time crying about the mass, they would study the WTC and figure out numbers in a day, something he has failed to do given over 5 years, or more. A quick estimation has been done, why can't he use this one? http://www.internationalskeptics.com/forums/showthread.php?t=87583 There is enough knowledge out there to estimate the mass of each WTC section, even the different strength of steel used on the shell. Anyone can estimate the mass, and then set bounds of their "model". Do the max, and min, etc. But a floor only holds 29,000,000 pounds, which is why the WTC collapsed like it did after terrorists flew planes into the WTC and murdered people. The WTC towers on 911 are two full up models of a gravity collapse and behaved as they were built. You can't beat full up reality, and there is no purpose to model the chaotic collapse of the WTC past initiation because one floor holds 29,000,000 pounds. That makes your statement wrong. Scientists would love to test full up models but the cost is usually a problem. On 911 the WTC were on fire, and then a gravity collapse. No one can beat this model we saw collapse on 911. You are wrong. You can't produce a purpose for the study to repeat 911 again. Which part of 29,000,000 pounds fails to meet a model for what a floor holds? My model wins, and can be seen on video, a gravity collapse. And that was the last time you said I was wrong, so you will not be wrong any more. Are you saying you don't believe a floor fails when you put over 29,000,000 pounds on it? Do you think NIST got that right. The chief structural engineer has no need for a model of the collapse, and understands the gravity collapse. Are you saying a gravity collapse is not possible after being proved by two full up WTC towers? Engineers don't need no stinkin model when they can witness the real thing. You can estimate the mass of the WTC, I can't help it if Psikey can't do simple engineering, simple estimation. There is work already done estimating the mass of the WTC, many times by ex-911 truth believers, who after research stop pushing fantasy from 911. What is the problem with estimating the mass of the WTC, what block is stopping him? You deny two full up models of the WTC are not how a gravity collapse looks, when it is the truth. Not sure what you are searching for, but why would engineers waste time modeling the WTC collapse when we know the weight one floor can hold? What is your block understanding the collapse continues to the ground, what is the purpose of wasting time on a model? You want a physical model, or math/computer models? Why can't you state a purpose and goal? The gravity collapse is proved by the WTC collapsing due to fires not fought, and video (and people who saw it in person). What is the block. Why do we need to study the collapse part? Why would the collapse not be like we saw, is there something wrong with reality? When will the many experts Gage has signed up for the lies he spreads do a model? Since when are models better than the real thing? I had model airplanes, but nothing beats pulling 7gs in the real thing, or does it ... I read the manual, this jet was rated at 7.33g (at one time, long ago), I flight tested (okay, chasing clouds) the full up model, and verified the 7.33g, I did not demand a model to test out what I saw in reality (plus if he wings failed, I had an ejection seat, and a parachute). If we read the manual on the WTC (aka do research), we find the WTC floors can hold about 29,000,000 pounds. The top sections weighed more than what a floor can hold, when they failed during the fires, the WTC collapsed and we have two real WTC towers showing how a gravity collapse of the WTC looks - what no model can do. A model will not change what a real WTC could hold.