industrial building 3d model

A simple rectangular industrial building. Two floors visible from outside. An external metal staircase on the side. The first floor interior has 6 rooms: 1 large workshop, 3 small offices, 1 storage room, 1 break room. A central hallway connects all rooms. Basement level with narrow corridors and 5 small storage rooms. Staircase from first floor down to basement. No internal staircase to the second floor. No doors, no windows, no furniture, no objects. Just bare concrete walls and floors. Low poly, clean geometry, isolated on white background. Masterpiece, high quality.