Two orcs
Officially better than you, according to PoN
Portable grate (something I have a character actually build and use in a dungeon)
Contraption which in its closed state look like a heavy bundle of iron bars. When a handle is turned it unfolds into a door-shaped steel grate with sharp points for digging into a door frame or bracing against stone. The handle can be locked in place with a padlock. As a rule of thumb small monsters have no chance of bashing it, but might be able to slip through the bars. Medium sized monsters can bash it given time and tools and large monsters have as hard a time bashing it as regular adventurers do regular doors. Huge monsters can trivially break it.
Contraption which in its closed state look like a heavy bundle of iron bars. When a handle is turned it unfolds into a door-shaped steel grate with sharp points for digging into a door frame or bracing against stone. The handle can be locked in place with a padlock. As a rule of thumb small monsters have no chance of bashing it, but might be able to slip through the bars. Medium sized monsters can bash it given time and tools and large monsters have as hard a time bashing it as regular adventurers do regular doors. Huge monsters can trivially break it.