Well it obviously is that easy because a guy in his back garden manufactured it and did it with a bit of experimentation and a short learning curve.
No doubt you could also do it.
I have already explained above how easy it is to access all the beams etc from the crawlspaces on each floor accessed via ceiling tiles so that covers concealment does it not.
Do you recall the bit at the end where he blows the bolts off using very small amounts of thermite.
I expect you are well acquainted with shaped charges and 'beehive charges'.
There are thousands of different types of charge as you must well know.
Explosives/cutters are merely the catalyst, gravity is the key force at work once the key supports are taken out.
I think you would not treat even a 1/4 lb of explosive with disrespect because you know the devastation it can cause.
http://socioecohistory.wordpress.co...e-world-trade-center-shape-charges-were-used/
External Quote:
Here's what demolition experts use in steel framed buildings, the linear shaped charge … It generates around 3,000,000 psi pressure … at a speed in excess of 27,000 feet per second … There are over 1000 different types of explosive … With the use of delays we can control … where the debris lands … vibration … noise level. WMV video download (680kB)
The job of a shaped charge is to cut steel H-beams. "The way we do this is by cutting the beam at an angle which through a series of beams cut at the same angle will tend to make the building shift over and 'walk'" WMV video download (670kB)
Also, bonus question: If its that easy, why do demolition crews waste their time with silly explosives, when a few office fires would do?