There aren’t many jobs more difficult than construction. 
And while these guys are only ten stories above ground, the challenge and risk are in no way diminished. Look at the worker, in the upper left hand of this sequence, scaling down the girder. 
There is a video for each of these sequences. Just click on any of the pictures above.
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What’s more difficult or dangerous work, working metal on the 10th floor in -10 dec C temp (or say, 90 def F) / or creating proem centred works on Banksy?
Construction. Definitely.