Frequently Asked Questions : Advanced Explosives Demolition Inc.
|Will The Implosion Affect Gas Lines, Water Lines, Electrical Services and Other Utilities?|
|No. There will be no adverse effect on any of these utility services as a result of implosion operations.|
|How Will The Schools Be Affected?|
|The schools will not be adversely affected by the implosion. If the wind is blowing toward the school at the time of the implosion, a thin coating of dust will result. There will be no structural damage as a result of the implosion. The Implosion Team will be reviewing implosion operations with representatives of the area schools.|
|Do We Need To Board Up Our Windows? Will Our Windows Break?|
|We do not expect windows to be broken as a result of the operation. No special effort will be needed on the part of any resident or shop owner adjacent to the site. If the contractor chooses to place any protection on adjacent properties, it will be erected and removed by the contractor at his expense.|
|Will The Dust Affect My Breathing Or My Asthma?|
|We are always concerned with the impact of dust on residents who might have respiratory problems. First and foremost, we try to see that these residents are put in a position upwind during the implosion. In other words, if the wind is blowing out of the east to the west, we would like you to be on the east side of the structure so the dust blows away from you. If you are in an area where you do not have to evacuate your structure, it is usually more than adequate to close windows and doors to keep dust out. If there is any question about the effect of masonry dust on your specific respiratory ailments, you should consult your physician accordingly.|
|How Far Will The Dust Travel?|
|First of all, it’s important to point out that the same quantity of dust will be created by the implosion, as would be the case by demolition. The advantage of implosion is that the dust is created at one, predetermined time. In other words, we can all plan for the dust and deal with or mitigate it accordingly.
The distance the dust travels depends entirely upon the direction and speed of the wind at the time of the implosion. If it were an absolutely still day, the dust might not travel much. On a windy day, the dust will travel much farther. Most of the heavy dust particles fall out of the air within a few hundred feet, while finer particles can travel at a greater distance.
|How Will The Implosion Affect The Nearby Homes And Other Structures Within The Complex?|
|The most obvious impact will be the fact that the area will be temporarily cleared within the safety perimeter during the implosion. We will ask residents and shop owners within that vicinity to close their windows, turn off air conditioning units and other air intakes, place plastic sheeting over louvers or vents in their buildings and take other general precautions to ensure that dust doesn’t enter their structures. Dust is the main byproduct of all types of demolition, which affects adjacent properties. Noise and vibration levels will be generally below those as limited by law (laws vary by state) and would be well below levels that would cause any type of damage, even to older and possibly poorly maintained structures.|
|Do We Detonate All The Floors?|
|The number of floors to detonate will be determined by structural analysis. This analysis includes: the condition of the structure, height of structure, exposures surrounding the structure and direction of fall, to mention a few. We specifically weaken a required number of floors to ensure the building inclines to a non-exposed area or create a non-exposure area via sequencing the detonations.|
|What Type Of Explosives Do We Use?|
|The nature of explosives has dramatically changed over the decades. When a structural steel building is imploded, you view the work of a Space Age explosive called a "Linear Shaped Charge". We use this tool to actually sever steel, not "blow it apart". Most often we will use good old-fashioned dynamite, because of it's detonation properties, or a newly developed product in "slurry" form.
Once the 'button is pushed' all of the charges will detonate at a predetermined interval. The blast machine is mastered from a command post, which is generally set up several hundred feet from the structure. Safety coordination is generally directed from the command post, which is made up of the blast team including representatives of the City.
|How Long Will The Implosion Take? Will We Feel It?|
|The actual implosion will last no more than a few seconds. Advanced Explosives Demolition Inc. will generally place many small explosive charges (usually weighing a few ounces each) at critical locations on the structure. These charges will detonate at intervals to dominate the direction of fall.
With respect to 'feeling it', it is amazing how sensitive the human body is! Whether or not you 'feel it' will depend upon where you are at the time of the implosion. If you are standing downwind, you will think you feel it when you hear the noise created by the charges being detonated. Actually, you won’t. Nor will you feel the vibration from the detonation of the small charges or the fall of debris at ground level. Seismographs will be used to record the actual vibration of the implosion operations and the falling debris.
|What Is The Blast Perimeter?|
|Through a carefully planned, step-by-step process, the Advanced Explosives Demolition Inc. Team and City Officials determine a perimeter, which must be cleared to absolutely guarantee safety of all residents and personnel. Based on prior experience, the area is normally 500 to 1000 feet around the buildings being imploded during the actual detonation of the demolition charges. There are actually two perimeters: the Primary Exclusion Zone and the Secondary Exclusion Zone. The Primary Zone allows the passage of essential personnel that are directly related to the blasting operations; no vehicles or pedestrians are allowed in this area. The Secondary Zone allows regular every-day passage of vehicles and pedestrians. Police and security personnel will enforce these safety perimeters.|