"aemeijers" wrote
Same way you ties off anything. A big assed cable around it secured to the ground, a tank, another building.
Even if you only have
It may not make it fall in the intended direction, but it can help keep it away from unintended consequences, like the power lines. They could have gotten it inside of a 220 degree (or so) arc and had a miss.
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Did the guys climb up those narrow wood ladders tied together? That is how they did some work on the stack in our building, about 120 feet or so. Took down the top courses and re-built it. Scary just to watch them climb.