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I am an aircraft structural technician who understands the specifics of what happened as well as a pilot to understand that truthers have been posting disinformation and lies over the years since the 9/11 attack.
The problem is, Hollywood is one thing, commercial demolition of buildings is anorher, so once again, demolition companies to not use such devices to demolish tall buildings.
Whether working in heavy or light manufacturing areas for the petrochemical, metal, power generation or automotive industries, Controlled Demolition Incorporated’s implosion capabilities and DREXS (Directional Remote Explosive Severance) System facilitate the demolition or dismantling of all types of steel and concrete facilities to provide the safe, expeditious and cost-effective removal of industrial structures.
Four (4), 3,000 ton blast furnaces fell to Controlled Demolition Incorporated’s expertise at the US Steel Plant in Youngstown, Ohio to clear the land for future development. In all, Controlled Demolition Incorporated has felled 32 blast furnaces and hundreds of stoves, stacks and other steel mill structures across the United States as the US industry revamps for the 21st Century. Controlled Demolition Incorporated also serves contractors and owners in dozens of other industries in their plant modernization programs.
No Randy you are not having a debate, that would require some semblance of a fair fight, clearly you are not fighting fair, you have way to much common sense. So, no debate, sorry!
Indications of the Imminent Collapseof the World Trade Center BuildingsDisprove Explosives Theory
"The NYPD aviation unit reported critical information about the impending collapse of the buildings." They could see that the exterior steel beams of the buildings were bowing. You can see the inward bowing of the steel columns in pictures of both WTC 2, (the first building to collapse) and WTC 1 (the second building to collapse.)
"According to Shyam Sunder, the concave bowing of the steel was seen on the sides of the towersopposite where the planes hit them. At 10:06 a.m. that morning, an officer in a police helicopter reported that ``it's not going to take long before the north tower comes down.'' This was 20 minutes before it collapsed. In another radio transmission at 10:21 a.m., the officer said he saw buckling in the north tower's southern face, Shyam Sunder said."
"Engineers believe the bowing of the exterior steel beams near the flame-engulfed floors was the critical "triggering point" because that's the direction each tower tiltedas it came crashing down."
"The report includes photographs taken from police helicopters showing the bending columns."
Key findings include:
Floor sagging and exposure to high temperatures caused the perimeter columns to bow inward and buckle—a process that spread across the faces of the buildings.
Even though the jet fuel on the planes burned off in the first few minutes after impact, there was enough office furniture to sustain intense fires for at least an hour.
The original builders of the twin towers and those who later renovated the structures did not have a clear technical standard for deciding on how much insulation to use around the structural beams, many of which gave way in the intense heat.
Read more here: Police, Firemen and Civilians Saw Warning Signs of Collapse of the Twin Towers on September 11th 2001
Did experts on the scene think WTC 7 was a controlled demolition?
Whom should we ask to find out if WTC 7’s collapse resembled an explosive demolition? How about asking the explosive demolition experts who were on the scene on 9/11? Brent Blanchard of Protec:
"Several demolition teams had reached Ground Zero by 3:00 pm on 9/11, and these individuals witnessed the collapse of WTC 7 from within a few hundred feet of the event. We have spoken with several who possess extensive experience in explosive demolition, and all reported seeing or hearing nothing to indicate an explosive detonation precipitating the collapse.
As one eyewitness told us, "We were all standing around helpless...we knew full well it was going to collapse. Everyone there knew. You gotta remember there was a lot of confusion and we didn't know if another plane was coming...but I never heard explosions like demo charges.
We knew with the damage to the building and how hot the fire was, that building was gonna go, so we just waited, and a little later it went."
www.implosion...... of 9-8-06 .pdf
Controlled Demolition Inc
D.H. Griffin Companies
Yannuzzi Demolition & Disposal
Temperature and Strength of Metals
Influence of temperature on the strength of metals
Some common types of steel lose 10% of their strength at 450 C (840 F), and 40% at 550 C (1022 F). At temperatures above 800 C ( 1475 F), it has lost 90% of its strength. Other types of steel are made to stand higher temperatures before losing 10% of their strength, but they are much more expensive (and are weaker at room temperature).
And there are types which actually get stronger, up to 450 F (but then get a lot weaker at higher temperatures
According to Shyam-Sunder, the concave bowing of the steel was seen on the sides of the towers opposite where the planes hit them. At 10:06 a.m. that morning, an officer in a police helicopter reported that ``it's not going to take long before the north tower comes down.'' This was 20 minutes before it collapsed. In another radio transmission at 10:21 a.m., the officer said he saw buckling in the north tower's southern face, Shyam-Sunder said. The report includes photographs taken from police helicopters showing the bending columns.
Police had already ordered a complete evacuation of the north tower at the time those transmissions were made, said Police Department Inspector Michael Coan. Both transmissions came after the south tower was already down, he said.
Indications of the Imminent Collapse of the World Trade Center Buildings Disprove Explosives Theory
Scientists investigating the Sept. 11, 2001 collapse of the twin towers said, "the World Trade Center towers showed telltale signs they were about to collapse several minutes before each crumbled to the ground." There would not be telltale signs if it was explosives (Controlled Demolition) that caused the buildings to collapse.
"In the case of the north tower, police chopper pilots reported seeing the warning signs - an inward bowing of the building facade - at least eight minutes before it collapsed at 10:29 a.m." New York Daily News reporter Paul Shin wrote in his June 19th, 2004 article 9/11 cops saw collapse coming.
NYC Police Saw Sign of Tower Collapse, Study Says (Update2)
June 18 (Bloomberg) -- Federal engineering investigators studying the destruction of the World Trade Center's twin towers on Sept. 11 said New York Police Department aviation units reported an inward bowing of the buildings' columns in the minutes before they collapsed, a signal they were about to fall.
Why the World Trade Center Buildings Collapsed: A Fire Chief ’s Assessment
Bearing walls and Open floor design
When the jet liners crashed into the towers based upon knowledge of the tower construction and high-rise firefighting experience the following happened: First the plane broke through the tubular steel-bearing wall. This started the building failure. Next the exploding, disintegrating, 185-ton jet plane slid across an open office floor area and severed many of the steel interior columns in the center core area. Plane parts also crashed through the plasterboard-enclosed stairways, cutting off the exits from the upper floors.
The jet collapsed the ceilings and scraped most of the spray-on fire retarding asbestos from the steel trusses. The steel truss floor supports probably started to fail quickly from the flames and the center steel supporting columns severed
Blast furnaces are not tall steel frame buildings. Once again, demolition do not use remote control to demolish tall steel frame buildings in cities.
I take back everything I said in the OP. I am totally convinced now, I am completely wrong in my mental faculties.
And once again, you really need to stick to what you know.
THE WORLD TRADE CENTER COLLAPSE
Questions & Answers
Implosionworld.com has received numerous inquiries from around the world requesting information and commentary relating to the terrorist attacks of September 11th, 2001, and specifically the felling of the World Trade Center towers. We have been contacted by media outlets, structural engineers, schoolteachers, conspiracy theorists and many others who are searching for answers and some “perspective” regarding these significant events that have evoked deep emotions and undoubtedly changed our world forever.
The editors of implosionworld.com have created this page to answer a few of the most frequently asked questions that fall within our area of knowledge and expertise. But first we’d like to be clear in stating that any conversation relating to “implosions” and what causes structures to fail is undertaken with reverence and respect to those who perished as a result of this event. As many of our frequent web visitors are aware, Implosionworld.com’s offices are located close to New York City, and several of our employees were personally touched by this tragedy. Our thoughts and prayers remain with the families of those lost and injured, and our intent here is to help foster a constructive base of knowledge and understanding through education, while dispelling false rumors related to the attack.
DID THE WORLD TRADE CENTER TOWERS ACTUALLY “IMPLODE”?
No. They collapsed in an uncontrolled fashion, causing extensive damage to surrounding structures, roadways and utilities. Although when viewed from a distance the towers appeared to have telescoped almost straight down, a closer look at video replays reveal sizeable portions of each building breaking free during the collapse, with the largest sections--some as tall as 30 or 40 stories--actually “laying out” in several directions. The outward failure of these sections is believed to have caused much of the significant damage to adjacent structures, and smaller debris caused structural and cosmetic damage to hundreds of additional buildings around the perimeter of the site.
WHY DID THEY COLLAPSE?
Each 110-story tower contained a central steel core surrounded by open office space, with 18-inch steel tubes running vertically along the outside of the building. These structural elements provided the support for the building, and most experts agree that the planes impacting the buildings alone would not have caused them to collapse. The intense heat from the burning jet fuel, however, gradually softened the steel core and redistributed the weight to the outer tubes, which were slowly deformed by the added weight and the heat of the fire. Eventually, the integrity of these tubes was compromised to the point where they buckled under the weight of the higher floors, causing a gravitational chain reaction that continued until all of the floors were at ground level.
DID THE TERRORISTS PLANT ANY BOMBS IN THE BUILDINGS IN ADVANCE TO GUARANTEE THEIR DEMISE?
To our knowledge there is no evidence whatsoever to support this assertion. Analysis of video and photographs of both towers clearly shows that the initial structural failure occurred at or near the points where the planes impacted the buildings. Furthermore, there is no visible or audible indication that explosives or any other supplemental catalyst was used in the attack.