Unlike other superheroes, he is generally depicted as skinny and unimposing physically. Due to the constantly changing strength classifications of super heroes I've lost track of where he fits in.

I remember back in an 80s comic he's shown crushing a steel handrail on a bus by just squeezing it and was depicted as roughly equal to the Thing in raw strength. Where does he fit in now? 

Edit: We already know he's much stronger than non-superheros so this is not a duplicate about how Doc Oc can survive his punch. As that answer points out that he pulls his punch. That doesn't answer the question posed here.