Hello !
I do not know of any such standard (but another person may be able to identify one).
I think it is imposible to standardize a stability rule of this kind of storage by stacking similar loads.
The "height limit" stability of such a column can not be absolute: it necessarily depends on the width of the base and the greater or less "flexibility" of the blocks or packets. So this can only be a specific rule to the company, witch needs to be determined locally empirically by appreciating the risky "ballrooming" of a column "too high" for each type of packets ...
Cordially.
PS: and what to say in addition to the risk of "domino effect" if a first column switches ...