A storage cabinet assembly includes a housing including a pair of sidewalls, a rear wall, and a top wall that cooperate with one another to form a storage area, and a base assembly supporting the housing. The base assembly includes a top wall and a bottom wall that mate together to form an interior space, and a plurality of corner support brackets supporting the top wall from the bottom wall. The storage cabinet assembly further includes a drop-in drawer arrangement, and a drawer interlock assembly adapted to prevent multiple drawers from being simultaneously moved to an opened position.