Is it to do with visibility?What are some other colours of cranes?
Visibility. In the U.S. most that I have dealt with have been schoolbus yellow or international orange. Cranes represent a hazard not only from the fact that the crane operator has restricted visibility and has to concentrate on the load and the signals he is receiving from the rigger but the load itself constitutes a hazard.
Here is NZ they are normally yellow
I think Red Oxide, protects best from corrosion, and red colour also warns about danger. We can see yellow colour also.
