Modular bolted tank of polygonal shape was assembled

Assemblage was made in the room with many columns, which as you may see at photo, were left inside of the tank. Herewith each column is hermetically separated from the tank. 

Tank with capacity 335 cbm (88,500 gallons) due to it's modular construction was erected without welding. Design is made in the way for best filling of useful volume of the room.