how do they bring down skyscrapers

[Yoga Face]

eventually they all must come down


this vid leaves me speechless

they take the first floor down first and the top floor last

it is called daruma-otoshi

never would have thought of it

[video]http://www.bing.com/videos/search?q=daruma-otoshi+demolition&view=detail&&mid=FD2E5920EFEE581B9DEBFD2E5920EFEE581B9DEB[/video]

 

[destillat]

Find a country that they want to invade and create an elaborate soap opera involving a few planes fully laden with fuel and some indestructible passports.

 

[Yoga Face]

find a country that they want to invade and create an elaborate soap opera involving a few planes fully laden with fuel and some indestructible passports.

the trade towers makes me wonder if implosion is feasible

PHYSICS MAKES THE TOWERS COME STRAIGHT DOWN, it is impossible to make them fall sideways, so the only problem left is the towers foot print damages everything near the collapse


so ....


1 if possible, dig a huge basement

2 implosion makes the tower come straight down into the giant hole

 

[fuji]

The WTC wasn't built the way most buildings are built. It had a totally different design principle when the floors hung from a frame rather than the more common method is supported by pillars.

Since the WTC floors were basically hanging, when they fell they went straight down. A building that uses pillars on the other hand is at risk of toppling.

 

[Yoga Face]

The WTC wasn't built the way most buildings are built. It had a totally different design principle when the floors hung from a frame rather than the more common method is supported by pillars.

Since the WTC floors were basically hanging, when they fell they went straight down. A building that uses pillars on the other hand is at risk of toppling.

I believe it is called truss

firemen never trust a truss

different designs will require different demolishing methods




In engineering, a truss is a structure that "consists of two-force members only, where the members are organized so that the assemblage as a whole behaves as a single object". A "two-force member" is a structural component where force is applied to only two points. Although this rigorous definition allows the members to have any shape connected in any stable configuration, trusses typically comprise five or more triangular units constructed with straight members whose ends are connected at joints referred to as nodes. In this typical context, external forces and reactions to those forces are considered to act only at the nodes and result in forces in the members which are either tensile or compressive. For straight members, moments (torques) are explicitly excluded because, and only because, all the joints in a truss are treated as revolutes, as is necessary for the links to be two-force members.

truss bridge

 

[Keebler Elf]

They probably did it that way (the vid in the OP) because implosion isn't an option in a busy urban area.

 

[Yoga Face]

They probably did it that way (the vid in the OP) because implosion isn't an option in a busy urban area.

yes, it is less messy is the reason

but only certain buildings can come down bottom up

it was not a skyscraper