Controlled demolition dust suppression cannons - GIF

Controlled demolition dust suppression cannons.

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Previously:

https://www.homemadetools.net/forum/...5851#post82647
https://www.homemadetools.net/forum/...850#post156309
https://www.homemadetools.net/forum/...541#post201098
https://www.homemadetools.net/forum/...329#post192429
https://www.homemadetools.net/forum/...228#post180740

Not nearly the pizzazz of the Bellagio Fountains in Los Vegas.
https://youtu.be/mrs9RM0kI0A

And they didn't seem to work very well either! Except to produce lots of mud perhaps.

Imagine how much dust there would have been without them! :)

Quote:

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Originally Posted by Hoosiersmoker

Imagine how much dust there would have been without them! :)

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By my "sound bite" logic:

1) There is no dust;
2) The water cannons go off;
3) There is now a lot of dust;
4) The water cannons caused the dust;
5) There would not have been any dust if the water cannons didn't go off.
6) Q.E.D

Don't seemed to have worked very well...

Quote:

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Originally Posted by mlochala

Don't seemed to have worked very well...

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My SWAG is that the water is meant to trap the fine dust that would remain airborne and be blown all over by any air movement. The larger dust chunks can obviously penetrate the water curtain but gravity will quickly deposit them near the demolition site.

The post demolition cloud color starts off brownish but becomes whiter as the cloud expands. A lot of that cloud is probably water vapor and not dust from the explosion.

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Whooops! That's probably not what they were hoping for.

Nothing is guaranteed.

What did the expect? They only put explosives on the first three floors. Did they expect it to collapse straight down?

Ralph

Quote:

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Originally Posted by Ralphxyz

What did the expect? They only put explosives on the first three floors. Did they expect it to collapse straight down?

Ralph

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A lot depends on how much they pre weakened the columns in the floors above, for how many floors and how they went about weakening them. Jack hammering the concrete cladding goes a long way. Strategically placing small notches in the flanges of the columns goes even further but can be dangerous if the blast has to be delayed for several days. Much safer to wrap primer cord around the columns to be set off at the time of the blast.
But any demolitionist will tell you there is a 50/50 chance something will not go according to plan on any given day.

This is why you hire the pros, not your brother-in-law who runs a side business selling fireworks. /s

Hope that there was nobody in that site shed.

Quote:

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Originally Posted by Floradawg

Nothing is guaranteed.

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Except that falling down thing.

Two building demolitions at the same site provide a strong demonstration of the absurdity of the NIST conclusion of pancaking of the three WTC towers by the descending building upper floors.

The first, skinny tower appears to be about 23 stories tall. At the initial (and only) blast,the intact top 20 or so stories falls vertically down on to bottom 3 or 4 stories, then stops descending, slowly tips to the side and crashes sideways to the ground. Steel frame? No “pancaking observed. Possible that demo crew expected pancaking since no charges are seen above the bottom stories. Apparently the tipover was not anticipated since the observers in front of the camera jumped up and ran. If demo crew anticipated tipover one would expect them to announce the fact and have observers at a safe distance, not surprised into running. Perhaps failure of wiring to timed demo charges higher up in building? Round-ended building visible adjacent to the tipped-over tower.

Rubble from the first tipover has been cleared up when 25-story round ended building with about 3-story high ground floor level is demolished. Same failure of planning. Ground level support is blasted away and building descends vertically, crushing round floor and 2 or 3 of the residential floors, THEN STOPS and slowly tips to the side. Weight of almost the entire building is insufficient to “pancake” more that 2 or 3 floors after energy of descending building is absorbed by crushing the bottom few stories. Crew apparently consists of very slow learners to have two identical failures in succession at the same location. This tipover was clearly not anticipated (planned) judging from the many people scattering from the site. Additionally, two shacks or possibly a venicle and a shack of some sort were crushed by the building and possibly a shipping container was barely missed. Surely not planned.

Does that provide any insight into the WTC official story/

Woops a daisey.

Some people fail to complete the course in implosion studies before they get too excited to try it.