As you just saw, the key to a search is how quickly and safely dismantle a tower crane that is in danger of collapsing. However, it is likely to take longer because the operation is dangerous enough to trigger a stoppage.
By Park Ha-jung, staff reporter.
Yesterday (15th), workers at the site of the collapse exercised the right to stop work due to danger, and the pre-reinforcement work method for dismantling the tower crane has changed.
Instead of directly reinforcing the supports that fix the high-rise building and the crane upper part, it is a method of connecting and fixing the tower crane and four apartments, including the collapsed apartment, with a thick wire made of twisted wires.
Workers install wires on the workbench at the end of the dismantling crane that is put in to dismantle the tower crane.
It is a safer method for workers than the originally planned reinforcement method, but it is not possible to accurately estimate how many workers and equipment will be required in the future.
[Han Sang-gil/Chairman of Korea Tower Crane Cooperative Association: (number of wires) 4, 6, or 8 angles are supported as they come out, and a lot of people are put in, so all four must be pulled at the same time.]
The center of gravity of the crane ahead of dismantling It is difficult to predict the completion time of the work as it must be pulled precisely and strongly so that it does not collapse.
[Jeong Hoe-woon / National Tower Crane Theory / Dismantling Labor Union Chairman: (Wire) You have to depend on the surrounding buildings, but you can’t pull too much on either side.
If the position (holding) of the two wires on the side of the collapsed building is not preceded, I think this work may take two or three days.]
Only after this work is completed, the work of partially dismantling the tower crane in question will go in.
Experts point out that the work schedule may change frequently if the tilted tower crane is vulnerable to external changes such as strong winds and there is an additional risk of collapse, such as the existing fixed support falling off further.
(Video coverage: Park Hyun-cheol, Lee Seung-hwan, video editing: Park Ji-in)Keywords: