Right now it is not possible to carry super heavy items through doors. And apparently super heavy items don't spawn indoors. However, there is a skill in the game that spawns a super heavy item inside and that is the Male Foo Lion when Aspect of the Ox is activated. So one class has the potential to use super heavy thrown items with the help of a Lightspeaker, but none of the other 3 classes capable of using super heavies (unless they somehow beat the HC to picking up the newly created granite statue)
So maybe narrow the damage values of the super heavy thrown items towards what a Granite Statue has and allow them to be carried in and out of doors.