Many grain elevators and feed processing plants are plagued by practical bottlenecks inherited from traditional silo structures. Dead storage zones inside cylindrical vessels, uneven grain output under low‑temperature conditions, and material damage during repeated handling frequently lead to capacity loss and unplanned downtime. In severe cases, operators can lose nearly 12% of usable storage volume due to stagnant material corners, while damp barley may block discharge outlets within only months of operation. The spiral storage bunker addresses these common failures through original structural optimisation rather than additional mechanical accessories.