Hello, These are both Obstacles.
The obstacle rules say some stuff.
…and may gain a DEF bonus against ranged or arcane attacks for concealment or cover depending on the nature of the terrain.
Barriers say they provide cover. The Keg and Fire Pit don’t say they do, so I guess don’t provide cover/concealment.
They both provide +2 Def vs Melee attacks though.
Does that sound right?