Corrugated Silo/

Corrugated Steel Flat Bottom Silo

Item Flat Bottom Silo
Diameter 5.5m-32m
Cylindrical Height 5.65m-31.42m
Roof Height 1.28m-9.22m
Capacity 144m3 (4,086 bu)-26063m3 (739,605 bu)
Wall Type Corrugated Steel
Material Hot-dip Galvanized Steel Sheet
Bottom Type Flat

  • Product Detail
  • Inquiry

Corrugated Steel Flat Bottom Silo

SiroSilo Industrial manufactures corrugated steel flat bottom silos with high performance, which is capable of storing large volumes of grain efficiently.


The corrugated steel silo is a kind of metal silo, it is constructed of corrugated galvanized steel sheets, and workers use torque wrenches to connect these sheets with bolts.


And the corrugated galvanized steel sheet is made by cold rolling, molding, and punching.


A corrugated metal grain silo is customizable for different grains/seeds, its diameter & capacity is designable as per your request.

Such corrugated steel silo is suitable for storing granular grains & seeds, such as:

  • Barley
  • Bean
  • Canola
  • Cereal
  • Corn/Maize
  • Millet
  • Oat
  • Oilseed
  • Paddy/Rice
  • Pea
  • Rapeseed
  • Sorghum
  • Soybean
  • Sunflower Seed
  • Triticale
  • Wheat


The corrugated sheet’s material is galvanized high-elastic S350GD steel, its galvanization thickness is usually 0.8mm-4.2mm, max. 600g/m2, and its total thickness can reach 8.4mm.


Corrugated Silo Sheets Production

Most of the corrugated silo sheets are produced by roller pressing.

To realize mass production, the silo roll forming machine is essential, such a machine is capable of making different sizes of corrugated silo sheets automatically.


The roller pressing has the following advantages:

  • Successively forms the wave shape;
  • Eliminates the internal stress;
  • Small resilience.

Thus, it ensures the corrugated silo sheets are highly qualified.


Even if the coil steel is thick, the silo roll forming machine can also convert it at once, as you can see in the following video.

In addition, the grain storage silo roll forming machine can work together with an unwinder, leveler, punch, hydraulic shear machine, and other equipment, directly converting the coiled steel into corrugated silo sheets.


The following video will show you the various equipment in the silo factory, including the silo sheet machine.

Flat Bottom Silo Advantages

According to the bottom type, 2 types of corrugated silos are optional:

  • Flat Bottom Silo
  • Hopper Bottom Silo

If your grain reserves are less than 1500 tons, it’s better to purchase a hopper silo, such a steel silo is convenient for unloading & doesn’t need grain bin cleaning equipment, lower in price;


If your grain reserves are greater than 1,500 tons, or even tens of thousands of tons, then you’d better buy a flat bottom steel silo.

Because the large-capacity flat bottom silo has floor support, it doesn’t need a bottom support structure like a hopper silo.

The flat bottom steel silo has the following advantages:

  • Reasonable Structure, Safe & Reliable, Long Service Life.

The cylindrical body is a combined structure of keel & corrugated silo sheet, such structure has high strength & integrity, with no deformation in use.


The body sheet is made of hot-dip galvanized coils, the roof sheet is also processed by galvanizing, which has strong corrosion resistance & long service life.

  • Complete Auxiliary Equipment & Advanced Technology.

An automatic temperature measurement system monitors the instant temperature inside the silo;

The ventilation system effectively prevents food mildew;

The level sensing system prompts the full/empty state of the material in the silo timely, automatic display & control.





And it cooperates with the conveying & cleaning equipment to realize automatic material loading & unloading.

  • Custom Diameter & Optional Bottom Type.

SiroSilo corrugated metal silo ranges in diameter from 5.5m to 32m, with a maximum storage capacity of 26,063 cubic meters.

Flat bottom & cone bottom silo bins are optional with different diameters & capacity, a total of more than 200 bin types for your choice.

  • One-stop Solution & Industry-leading After-sales Service.

SiroSilo has the ability to provide a one-stop grain storage solution, including steel silo design, manufacturing, sales, and after-sales.


Our corrugated steel flat bottom silo has been exported to the United States, Russia, Germany, Brazil, Thailand, India, and other countries, China’s largest grain, oil, and food company COFCO is also our customer.


Flat Bottom Silo Structure

In order to help you understand the flat bottom silo more comprehensively, let’s divide it into 4 parts, then introduce each in detail.

SiroSilo corrugated metal silo mainly includes the following 4 parts:

  • Bottom

This part contains:

  • Air Fan
  • Sweep Augers
  • Aeration Gutters System
  • ……

Sweep Auger

  • Body/Cylinder

The sidewall body consists of corrugated steel sheets, high-strength bolts (8.8) connect these sheets, and the Butyl rubber tape plays the sealing role, thus ensuring silo strength & rainproof effect.



This part contains:

  • Stiffeners
  • Ladder to Access Door
  • Reinforced Ring (Wind Ring)
  • Access Door
  • Grain Bin Bolts
  • Sealing Tape (Butyl Rubber)
  • ……

Wind Ring

  • Roof/Top

The C-shaped rafters & beams significantly improve the roof integrity, such a design is very suitable for the shape of a silo roof and eliminates the common deflection of Z-shaped rafters.


The roof vent cover is made of hot-dip galvanized steel, its unique structure avoids the rain’s influence on silos.

This section also contains:

  • Handrail
  • Charge Inlet
  • Inspection Door
  • Roof Steps
  • Catwalk
  • ……


  • Control System

This section contains:

  • Automatic Temperature Measurement System (Including Grain Bin Moisture Sensors)
  • Ventilation/Aeration System
  • Material Level System (Grain Bin Level Sensors)
  • ……

There is no doubt that SiroSilo is a professional corrugated metal silo supplier, we are worthy of your trust.

If you want to learn more about our flat bottom silo, welcome to send us an inquiry on this website, or directly contact us via the following Email/WhatsApp.


WhatsApp: +8617312124727

Flat Bottom Silo Ultimate FAQ Guide

Grain Silo

What is the Purpose of a Grain Silo?

A grain silo is a bulk material storage facility in agriculture.

It can store all kinds of grains & granular bulk materials, such as corn, soybeans, rapeseed, rice, etc., for long or short periods of time.

Grain & oil processing plants, feed processing plants, large farms, grain transfer terminals, storage centers, and biofuel companies must equip with grain silos.


Agricultural cooperatives or farmers also purchase bins and silos to store grains, seeds, or fermented feed. They store the grain in the silo bin for a certain period, after the grain price meets their expectations, then sell the grain.

Farm grain silo not only solves the storage problem for agricultural cooperatives & farmers but also improves the grain storage quality.

The farm grain silo prevents the powder from directly polluting the air, and also prevents moisture from entering, avoids material agglomeration, and protects the material better.

How Does a Grain Silo Work?

Speaking of how a grain bin works, it actually refers to how a grain bin loads material, unloads material and prevents grain mildew.

Whether it is a flat bottom silo or a hopper bottom silo, there is a material inlet on the roof.

The bucket elevator & drag conveyor loads material into the grain bin from the inlet, and the level sensor in the silo bin monitors the material level in real time when loading.


Bucket Elevator

When unloading, there is a center outlet & several intermediate outlets at the bottom.

After discharging most of the material from the center outlet, the auger sweeps the remaining material to the intermediate outlet for emptying.

In order to prevent food mildew, the flat bottom silo & hopper bottom silo equips with temperature control & ventilation systems.

With these systems, the temperature & humidity in the silo bin are always normal.

Types of Grain Bins

There are many ways to classify grain bins.

  • Construction Materials

According to construction materials, 4 types of grain storage silos are available:

  • Concrete Silo
  • Brick Silo
  • Wooden Silo
  • Steel Silo

The steel silo is assembled by galvanized sheet, which is light in weight, low in cost, high in standardization, short in the construction period, wide in use, and easy to realize mechanization in factories.


3 types of steel silo are optional: assembly, welded, and spiral (Lipp).

  • Purpose

According to purpose, the grain storage silos are divided into the following 3 kinds:

  • Short-term Storage Silo Bin
  • Long-term Storage Silo Bin
  • Transit Storage Silo Bin

Ports, docks, and warehouses along the railway have large grain throughput, there is a lot of grain turnover, and fast loading & unloading is especially important.

Large & medium concrete or steel silos are common, their capacity is more than 50,000 tons, always pair with large loading & unloading equipment to work, and maintain high efficiency in operation.

The unloading machine lifts the grain from the ship/train to the conveying equipment, after the measuring & cleaning, it enters the grain storage silo.

  • Capacity

3 types are available: large, medium, and small.

Generally, a small grain storage silo’s capacity is 200 tons or less;

A medium-sized grain storage silo’s capacity is 201-1000 tons;

And large silo bins can store grains of 1,000 tons and above.

  • Bottom Shape

There are 2 types: hopper bottom & flat bottom.

How Much Do Grain Silos Cost?

The farm silo’s price depends on its construction materials, and capacity.

For example, for a 1,000-ton steel silo, its price on the Chinese market is USD$28,000.00-USD$38,000.00.


Because Chinese products have price advantages, if you purchase European & American farm silos, the price will be much higher.

How Long Does Grain Last in a Silo?

In theory, as long as the grain’s moisture content keeps at 13% or lower in the farm silo, the grain is always safe in it.

However, most grains are stored from harvest to sale, because the next harvest season needs an empty farm silo.

The silo bin really can store grain for a long time, as time goes by, the grain in the farm silo will gradually lose its nutrition, ultimately affecting the grain price.

Whatsmore, the manpower & material resources for storing grain will continue to accumulate over time.

Grain Silo Companies

If you enter grain silo companies in the keyword planner of Google Ads, some famous grain silo companies’ brand keywords appear in your eyes, such as:

  • Afgri
  • Chore Time
  • Scafco
  • Sioux
  • Sukup
  • Symaga

Besides them, the following pictures list many other grain silo companies:





Auger Grain Bin

Actually, the auger grain bin is a flat bottom bin, the flat bottom bin equips with a sweep auger for emptying material.

The hopper bottom bins don’t need a sweep auger, because grain automatically flows out of the hopper bottom bin under gravity.

A sweep auger is a spiral cleaner, it rotates around the center of the silo, and clears the remaining grain from the intermediate outlets.


Grain Drying Silos

The grain drying silos are agricultural silos with a drying system, this drying system usually includes hot air fans, a stirring machine/system, and so on.


Searching for stirring silos on Youtube, you will find a lot of videos related to grain-drying silos.

Grain Bin Level Sensors

The material level sensor measures the grain level in agricultural silos, the coal level in thermal power plants, and the cement level in cement plants.

Nowadays, the common material level sensors include rotary paddle, weight, heavy hammer, capacitive, microwave, ultrasonic types, etc., in our SiroSilo agricultural silo, it is the rotary paddle type.


Rotary Paddle Level Sensor

Each agriculture silo equips with high & low-level sensors.

When loading material, the high-level gauge detects whether the silo is full;

When unloading material, the low-level gauge monitors whether the silo is close to being empty.

Metal Silo

What are Metal Silos Used for?

Metal silos are cylindrical containers assembled from galvanized sheets, they are suitable for long-term storage of corn, beans, and other grains.

This type of silo is very common near grain & oil plants, feed mills, and ports.

At the top of the metal silos, there is a central inlet. When loading, the material enters the silo from the central inlet;


Central Inlet

At the bottom of the metal silos, there is a central outlet and several intermediate outlets for taking out the materials.

Due to the comprehensive functions, simple assembly, and easy maintenance of metal silos, many large farms have gradually introduced metal silos for grain storage.

Metal silos are divided into the assembly, welded & spiral (Lipp) types, we SiroSilo just promote the assembled corrugated grain bin and welcome you to contact us for more details about our corrugated grain bin.

Steel Silo Manufacturers

The figure below displays the famous steel silo manufacturers all over the world.


As professional steel silo manufacturers here in China, we SiroSilo are also worthy of your trust as a COFCO supplier.

You are welcome to take two minutes to send us your inquiry, and we will reply to you within 1 hour.

Grain Silo Rings


The picture above shows the grain silo wind rings, which are designed & installed according to wind loads.

The wind rings are usually connected to the stiffener through a locking bracket, they eliminate distortion & displacement, and increase the fixing strength for the silo, it is made of a hot-dip galvanized pipe.

The wind rings’ existence increases the safety & durability of metal silos.

Silo Ladder

There are many kinds of ladders on the silo, mainly including the following types:

  • Roof Ladders
  • Spiral Ladders
  • Access Ladders
  • Vertical Ladder to Catwalk

How Much Does a Metal Silo Cost?

The cost of metal silos on the Chinese market are shown in the following pictures, you can refer to these prices when purchasing metal silos from China.



As a COFCO supplier in China, we SiroSilo sincerely hope you can contact us to get a quote for comparison, one more candidate means one more choice.

Flat Bottom Silo

Flat Bottom Steel Silo Design


As shown in this picture, the flat bottom silo design mainly involves the following components:

  • Support Cone
  • Wind Rings
  • Handrail
  • Roof Vents
  • Roof
  • Cylinder/Body
  • Monitor & Control System
  • Stiffeners
  • Aeration System
  • Sealing Fastener (Bolt & Screw)
  • Cooling System
  • Fumigation System
  • Sweep Auger

Flat Bottom Silo Discharge

In order to unload materials from the flat-bottomed silo, there is a center outlet & a number of intermediate outlets.

When unloading, most of the materials are discharged through the center outlet, then the remaining materials are emptied through the intermediate outlets by the sweep auger.

This design can maximize the emptying efficiency, easy & quick emptying saves your time & energy, and avoids damage to the flat bottom silo.

What is the Difference Between Silo and Hopper?

From the perspective of industry cognition, the hopper is more like a classification under the silo, in order to distinguish it from the flat bottom silo.

The hopper bottom silo & flat bottom silo has different bottom shape.

Hopper bottom silo is more convenient for unloading, suitable for use as a transit silo, the silo capacity is generally less than 1500 tons, it is cost-effective;


The flat bottom silo is generally used for large-capacity long-term storage, the unloading is not as convenient as the hopper bottom silo.

Flat Bottom Silo Price

Undoubtedly, capacity is the most influential factor for flat bottom silo price, the larger the capacity, the higher the price.

The price of a flat bottom silo in the Chinese market is shown in the figure below, it ranges from USD$10,000.00 to USD$100,000.00 according to capacity:


If you plan to purchase a flat bottom silo recently, please send us an inquiry on this site, we are worthy of your trust as a COFCO supplier.



    Leave a Reply



    Scan the QR Code with wechat

    Leave your message