Galvanized steel silos are widely used for grain, feed, and agricultural product storage due to their corrosion resistance, long service life, and flexible installation. Below is an overview of the most popular and best-selling sizes and capacities of galvanized steel silos, based on common market demand and real project experience.
Popular diameter ranges for galvanized steel silos
The silo diameter is the key factor determining storage capacity and overall cost efficiency. The most commonly used diameters on the market are:
Diameter 5–6 m
Mainly used for small farms, cooperatives, and feed processing support. Low investment and short construction time.
Diameter 7–10 m
A standard choice for small to medium grain storage facilities, offering balanced capacity and cost.
Diameter 11–15 m
One of the most popular configurations for regional grain stations and feed mill raw material storage, combining high capacity with good structural stability.
Diameter 18–30 m
Designed for large grain depots, ports, and centralized storage centers, suitable for long-term and large-scale storage.
Common height configurations
Silo height is usually matched with the diameter and structural design. Typical effective heights include:
10–12 m
Used for small-diameter silos, easy loading and unloading, suitable for short-term storage.
15–18 m
Standard height for medium-sized silos, offering a good balance between capacity and stability.
20–25 m
Common for large-diameter silos to increase storage volume per unit area.
30 m and above
Customized designs for large projects, requiring stronger foundations and structural reinforcement.
Best-selling galvanized steel silo capacity reference
Diameter (m) | Effective height (m) | Approx. capacity (tons) | Typical application
5.5 | 10 | 180–220 | Farm grain storage
7.0 | 12 | 400–500 | Small grain station
9.0 | 15 | 900–1,100 | Feed mill raw material silo
11.0 | 18 | 1,600–1,900 | Regional grain transfer
13.0 | 20 | 2,500–3,000 | Central grain storage
15.0 | 22 | 3,800–4,500 | Large grain reserve
18.0 | 25 | 6,500–7,500 | Bulk storage center
21.0 | 28 | 9,000–10,500 | Port grain silo
27.5 | 30 | 18,000–20,000 | National grain reserve
Note:
The capacities above are calculated based on bulk grains such as wheat and corn, with an average bulk density of approximately 0.75–0.80 t/m³. Actual capacity may vary depending on the stored material.
Key features of popular configurations
Hot-dip galvanized steel sheets with zinc coating of 275–450 g/m².
Corrugated wall structure to enhance resistance to lateral pressure.
Modular bolt-connected design for easy transportation and fast on-site installation.
Available in flat-bottom or hopper-bottom designs to meet different discharge requirements.
Optional ventilation, temperature monitoring, cleaning, and explosion-proof systems for future upgrades.
Selection recommendations
Small users are advised to choose silos with diameters of 5–9 m to control initial investment.
Feed mills and regional grain stations typically select 9–15 m diameter silos for higher turnover efficiency.
Large grain depots and centralized storage projects usually adopt silos with diameters above 18 m to reduce cost per ton of storage.
Conclusion
The best-selling galvanized steel silo sizes mainly fall within the diameter range of 7–15 m and heights of 12–22 m. These configurations offer an optimal balance between storage capacity, structural safety, and economic efficiency, making them the most widely adopted solutions in modern grain and feed storage projects.