4. THIS IS ONLY A TEST

Through their years of experience, most blasters are very good at estimating the amount of explosives needed to eliminate a specific type of concrete column or steel beam. But it helps to make absolutely sure.

DID YOU KNOW that on most major explosive demolition projects, the blaster initiates a 'test blast' several days before the actual demolition?
This usually involves selecting a few columns of varying size and width, then destroying them with slightly varying amounts of explosives. The resulting fragmentation will enable the blaster to calculate the smallest amount of explosive necessary to cause the failure of any given column. Finding this 'failure threshold' is critical because it helps to minimize the amount of flying debris, which in turn minimizes the possibility of damage to adjacent structures.
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