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c50. In a retansion wall.
C40 in precast concrete piles , C42 in prestressend concrete girders
I have used C65 in columns under a high rise, but I used I as self compacting concrete.
I have seen tests with a concrete bridge in C125. The problem I think is what to do with the shear force, if you use C125 the allowable shear force gets enormous, but is that correct?
