How Cranes are Constructed

I always get a kick out of seeing how things that build things get built.  I guess it’s sort of a fascination with knowing who’s my doctor’s doctor or lawyer’s lawyer type of thing, which actually began with the book Mike Mulligan and his Steam Shovel.  Which I understand makes no sense to type, but in my head at 6:30 a.m. in makes perfect sense to me.

In the case of the crane, it’s a bit of a chicken-egg shell game, as a crane is used to construct a crane. “There are a few tricks. The first is that the crane is actually rather short when the boom is put on, short enough that hanging one side before the other doesn’t tip the whole thing over. The second is that the huge concrete counter weights aren’t added until there is some weight to counter (obvious, really, when you think about it). And third, there is a lift system for adding vertical sections, meaning that the crane can be raised in place as the building grows.”

[via here/here]

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