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Question:

Why does the crane outside my window turn every night when it is not used during the day?

So, this might seem like an odd question, but here goes.I work in an office and outside the windows there's a crane. Every day I come in from work, it has turn a little. The half-finished building that it stands next to is not being worked on and there's never anyone using the crane during the day. There's no other construction going on in the area is stands at.It's pretty high up like 6th to 7th floot and it's in a windy town. Does that matter?Why would someone turn around a crane during the night? Is it all a scheme to make me paronoid because they know I'm starring out the window most of the day?

Answer:

Hi Peter no matter how good he brake on the turn table of the crane is it will be effected by the direction of the wind blowing at any time so it will have some influence on the direction the jib or the crane is in. it will turn just like a weather vane does. it is actually a safety feature.
I assume it's a tower crane, in which case it's probably because if it's locked and the wind is too strong it will collapse. However if it's free to rotate it'll simply move according to the wind direction
I guess it would be pretty windy up there at the top - maybe it is not fully locked, and the wind blows it around a little bit.

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