Canyon Contracting - GMU Demolition

Canyon Contracting, Inc. has released this exclusive video to get a glimpse inside their project at George Mason University. In this segment lies a bit of introductory information about the project as well as specified clips of the demo work in preparation for concrete column and slab replacement.

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9/11 North Tower WTC 1 Demolition 20 Blocks North With Standing Core Spire

NIST WNBC Dub10 Clips 49-54. How can a single column of steel be standing vertically 60 floors up in a collapse scenario? The floors above would have crushed it. How is the core spire piece still straight? Everything around it was blasted to dust and the demolished building above did not provide enough downward force to crush it. There would not be another answer since the building fell in on itself. The lower building was not damaged by fire but also blasted to dust with little resistance. ~10 seconds/110 floors = ~11 feet of downward travel every 1/10 second = ~1 foot every 1/100 second through 100 stories of over-engineered steel and concrete structures. A lead ball dropped from the roof would take 9.2 seconds. All that steel and concrete provided .8 second resistance? That is 8/1000 second resistance for 100 individual floors. Collapsed? Impossible in that time frame. In order for the building to fall that fast every connection and every piece of support steel would have to be removed instantly and allowed to fall like a rock or blasted and sucked into a vaccum created from explosions underneath.

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Demolition Services

Demolition services are the set of jobs that are required when a structure is to be demolished. These services are also required for the cleanup of buildings. Various construction works like roadwork, site work and several other installation works require demolition services. To ensure that a structure is safely demolished, the supervisor and the workers must map each of the site elements extremely carefully.

Below are the following steps which are generally employed in a demolition process:
 
·  Firstly, a thorough review is done of the structure's architectural plans.
 
·Secondly, information is collected about the various structural supports and the connections that have been used.
 
·  Next, the area is toured by the crew and the support structure is examined well.
 
· According to the analysis, the demolition experts make a selection of the equipments and the explosives (if any) to be used for the purpose.
 
· Sometimes, the blasting crews might also have to develop a computerized three-dimensional (3D) model of the structure to ensure that the collapse happens the way as predicted. If the building is within a city block, steel cables may be used to support the columns.
 
The demolition services perform a horde of activities which are enlisted as follows:
 
· Vibration prediction- this includes calculation studies using the vibration data which have been collected from other such demolished structures.
 
·  Vibration monitoring- Seismographs are brought into the field for an in depth study of the liabilities that can be posed by the structures in the surrounding.
 
· Noise monitoring- this is used for performing the various field measurements.
 
·  Structural inspections- these are to provide the clients with a well researched record informing on the pre-existing conditions.
 
· Project photography- this is for the visual record of the progress of the project. It is useful for the customers, government agencies and the insurance carriers.

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