Can someone help me find a site that talks more about demolition strips used to cut beams?

I can't find anything but conspiracy sites and debunking sites.

I once saw somewhere that some kind of strip can be used to help sever and or weaken beams. If this is true can you provide me with an actual demolition site to refer to.

In response to your question for more information regarding controlled demolition, I have attached the link below which will put you at the website of Controlled Demolitions, Inc.
Where on their "About Us" tab you will find the following.

"A two thousand ton skyscraper collapses like a house of cards, crumbling in on itself - a waterfall of well-fractured steel and concrete debris. It lasts only seconds, and buildings within a few meters stand untouched. The very essence of Controlled Demolition, Inc. is in our name: CONTROL"

And links to the associations that they belong to
(most of which require membership to gather any information):

If you would prefer something on the educational side you can try this site:

This shows examples from the History Channel.

For some unknown reason, during my course of researching your question, I ended up at the World Trade Center pictures and videos.
At the very bottom of this page is a picture:
"The core column shown above the firefighter was discovered after the collapse. The angled cut occurs in exactly the manner that shaped charges slice through steel beams to control the way they fall. Notice the hardened once liquid metal. Was thermite used with the shaped charge?"

Following the "Shaped Charge" link from the page above puts you at:

*** I think the video is what you may be looking for:
It's short and simple explanation and visual demonstration showing the people at Controlled Demolition Inc.
They are called "Linear Shaped Charges". LSC are mainly maunufactured in the US by goex or accurate arms. It is a Copper or Lead tube that is filled with various powder explosives, and then rolled through a series of dies to make the inverted V=shape required for cutting steel.

Following sources I list are all good..

REPLY to what really happened shows typical "chevron" shaped cleavage planes of massive plastic failure. Shaped charges would produce lines almost normal to the surface where they are attached, depending on which end they are detonated.

The answers post by the user, for information only, does not guarantee the right.

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