If You're talking about med to high quality cabs with the original drivers, then the answer is most probably no.
Originally Posted by Hellbastard
I'm probably wrong, but speaker enclosures don't have power rating. Is the speakers that do. But you could rattle a cab to death.
Actually any pressurized enclosure or a structure that's subjected to vibration does have a power/stress rating, but no-one I know publishes those figures.
Originally Posted by billfitzmaurice
It's possible for a poorly constructed cab to fall apart, yes.
IME it's likely
for a poorly constructed cab to fall apart. Especially if "better" than original speakers are used.
Slightly OT, but anyone who have listened the same speakers (Hi-Fi mainly) in cabs constructed from different materials can tell how much the cab rigidity actually changes the sound.
Cardboard on one extreme and granite, soapstone or concrete on the other for example. The results with just a few (or just two far enough apart) materials are amazing. The same goes IME for bracing.