Watching the awful tragedy caused by the earthquakes in Turkey, and in general, the biggest problem is obviously removing the rubble to rescue people, why do they not install a crane (2+ days) and use mobile ones in the meantime?
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Firstly there is not enough cranes in Turkey to cover all the affected areas. And secondly the rubble is all laying on top of each other and leaning on each other so you can not remove one piece of rubble without causing another to fall over. Typically the pockets where people survive is caused by two pieces of rubble leaning against each other, similar to how two sides of a roof leans on each other to create the living spaces of a house. If you remove of of the pieces of rubble there is nothing supporting the other piece and it will fall over and crush the people trapped under it. Obviously as time becomes more critical the rescue workers will start using more and more heavy equipment. The workers eventually have to chose between crushing some people who survived the earthquake or letting them die from the elements. But as far as possible they will search thrugh the rubble by hand and using dogs before they bring inn the heavy equipment to clear it out, and then start again once a few pieces have been removed. And when people are located they use as little equipment as possible to extract them in fear of collapsing the rubble on top of them, often having engineers conduct a full survey of the heap of rubble to figure out what they can and can’t do.
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