Flat Bottom Silos
Precision, Efficiency & Versatility
Rostfrei Prefabricated Grain Storage Silos are engineered for high-volume, long-term grain storage, combining structural strength, efficient discharge, and reliable grain preservation. Designed for permanent storage applications, our silos can be integrated with sweep augers, aeration, temperature monitoring, and automated handling systems for efficient and controlled operations.
Every Rostfrei silo is customized to suit the storage capacity, grain characteristics, site conditions, and operational requirements of the project, with a primary focus on grain quality, durability, and efficiency.
Diameter Range
Storage Capacity
Manufacturing Facility
Why Rostfrei Grain Storage Silos?
Rostfrei Grain Storage Silos are engineered to deliver efficient storage, reliable grain preservation, structural durability, and long-term operational value. From design and manufacturing to installation and after-sales support, every silo is developed around the specific requirements of the application.
Precision Engineering & Manufacturing
Our in-house design team uses advanced engineering and 3D modelling software to develop silos in accordance with applicable international standards. CNC-based drilling, bending, profiling, corrugation, turret punching, and laser cutting ensure accurate and consistent components for reliable assembly.
Advanced Steel Construction
Rostfrei silos are manufactured using high-quality Galvalume and Zincalume-coated steel sheets, supported by high-yield-strength galvanized structural stiffeners. This combination provides structural strength, corrosion resistance, and optimized material usage.
Optimized Wall Profile & Grain Flow
Our specially engineered wave-profiled wall sheets, manufactured using dedicated CNC profiling and corrugation machinery, provide enhanced structural strength while supporting smooth grain movement and easier cleaning. Controlled corrugation pitch and depth are designed to withstand grain loads while minimizing material residue.
High-Strength Bolted Construction
Rostfrei silos use 8.8 and 10.9 grade high-strength bolts with hot-dip galvanized protection, as per applicable standards and project specifications. Precision-manufactured components and bolted construction enable efficient assembly and reliable structural performance.
Optimized Roof Design
The cylindrical silo body with a 31° sloped conical roof is designed for efficient storage of grains, seeds, and other bulk materials, while supporting effective integration with loading, unloading, and material-handling systems.
Designed for Grain Quality
Rostfrei silos can be equipped with aeration systems, ventilation, temperature monitoring, and automated controls to help maintain suitable storage conditions, reduce spoilage, and minimize grain losses caused by moisture, pests, contamination, and other storage factors.
High Capacity & Complete Customization
With Flat Bottom Silos available up to 15,000 MT per unit, Rostfrei provides scalable storage solutions for large-scale facilities. Each silo can be customized according to capacity, dimensions, grain characteristics, site conditions, steel grade, accessories, handling systems, and automation requirements.
Efficient & Future-Ready Storage
Rostfrei silos maximize storage capacity within a relatively compact footprint and can be integrated with conveying, loading, unloading, aeration, monitoring, and automation systems. The configuration can also be adapted as storage and operational requirements evolve.
Complete Project & After-Sales Support
With experience across 8,000+ successful installations, our project teams support installation and commissioning across diverse site conditions. Our service network provides technical and after-sales support to help ensure reliable long-term operation.
Design Standards
Rostfrei Flat Bottom Silos are engineered with reference to internationally recognized European standards, including:
| EN 1991-4: | Actions on Silos and Tanks |
|---|---|
| EN 1993-4-1: | Design of Steel Silos |
| EN 1993-4-2: | Design of Steel Tanks |
| EN 1991-1-4: | Wind Actions |
| EN 1998-4: | Seismic Design of Silos, Tanks and Pipelines |
These standards provide the basis for structural design, loading conditions, wind actions, seismic considerations, and overall silo performance.
Quality Check
Quality verification is carried out throughout production and before dispatch.
In-Process Quality Check
Continuous monitoring confirms adherence to manufacturing specifications.
Material Quality Check
Incoming materials are inspected to verify compliance with required standards.
Pre-Dispatch Inspection
Final inspection confirms product readiness before shipment.
Proper Packaging
Suitable pallets, crates, wooden boxes, and stands help ensure safe transport.
Process & Technology
Every Rostfrei silo passes through a controlled manufacturing process to ensure dimensional accuracy, structural integrity, and consistent quality.
CNC Drilling
Precision drilling of nut and bolt holes ensures accurate alignment during assembly.
CNC Bending
High-precision CNC machines provide consistent component dimensions and geometry.
Profiling & Corrugation
Wall panels are profiled and corrugated using dedicated CNC machinery for uniformity and structural strength.
Hot-Dip Galvanizing
Fabricated components undergo hot-dip galvanizing as per applicable standards and project requirements for enhanced corrosion protection.
Quality Inspection
Incoming materials, in-process manufacturing, and finished components undergo defined quality checks before dispatch.
Protective Packaging
Components are securely packed using pallets, crates, wooden boxes, stands, and other suitable protective arrangements for safe transportation and handling.
Installation Process
Foundation preparation, anchoring, ring assembly, roof installation,
sealing, testing, and lifting are carried out as
a controlled sequence.
Foundation Preparation
A 100 mm raised platform step is prepared with anchoring PCD.
Silo Positioning
The silo diameter starts 50 mm away from the raised step and the gap is completed using RCC and foundation sealant coping.
Roof & Wall Ring Assembly
The dome cap, first wall rings, and roof rafters are assembled after foundation verification.
Wall Sheet Sealing
Vertical and horizontal overlaps are sealed and fastened using specified tapes, sealants, washers, and high-tensile bolts.
Expert Project Execution
Rostfrei’s project team supports installation, commissioning, hydro-testing, and client-team training for reliable long-term operation.
With over 8,000 successful installations, Rostfrei’s project team is equipped to professionally handle and commission silo projects in demanding environments while adhering to project timelines.
Silos are assembled using high-quality sealants and high-tensile bolts, while on-site training supports cost-effective operation and maintenance.
Applications of Flat Bottom Silos
Rostfrei Grain Storage Silos are suitable for a wide range of bulk-storage applications, including:
Flour mills, rice mills, pulse mills, oats processing and millet processing
Soybean, sesame, mustard, castor and other oilseed processing facilities
FCI, CWC, NCML and other institutional storage operators
Poultry feed and cattle feed
Need a Customized Quote?
Looking for tailored industrial storage solutions or specific product pricing? Get in touch with our expert engineering team for a detailed proposal.
GET A QUOTE