Block of square steel silo cells on a braced support structure with stair tower, bucket elevator and roof house

Solution · Square steel silos

Square steel silos, engineered as a system

Modular square and rectangular silo blocks for dry and granular bulk solids – profiled or smooth walls, hoppers, bin roofs, roof houses and support structures – engineered to EN 1991-4 and EN 1993-4-1, fabricated under EN 1090 EXC3 and assembled layer by layer on site.

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≈ 21 %
More footprint used than round silos: 1–100 +
Cells per silo block: EN 1991-4
Silo actions · AAC 1–3: EXC3
Certified fabrication · CE

Every square metre stores product

Round silos leave empty corners between them – about a fifth of the footprint inside a building or a plot. Square cells share their walls, so a silo block uses the whole area, holds many different products side by side and fits neatly into mills, feed plants and process buildings. The silo frame can even carry the building's roof and floors.

World Steel engineers the complete system: silo pressures and structure, cells, hoppers, bin roof and machine floor, roof house, stair towers and the support structure – then fabricates every part on CNC lines in our certified plant, coats or galvanizes it, ships it nested in containers and supervises the assembly on site.

Silo system

Silo types and components

A modular kit of engineered parts – combined to suit your product, capacity and building.

large cells, economical

Profiled-wall silos

Single-skin profiled walls stiffened by the profile – economical for large capacities per cell, galvanized or coated.

clean discharge

Smooth-wall silos

Smooth inner surfaces with external stiffeners – no residue, no mixing between cells, coated or stainless steel for food and sensitive products.

mass flow by design

Hoppers & support structures

Square or round outlets with inspection hatches, on braced steel supports or integrated into the building frame.

machine floor

Bin roofs & roof houses

Walkable bin roofs with man hatches, inlets, handrails and conveyors, enclosed by an insulated or single-skin roof house.

Aplicaciones

Industries we serve

Feed & pet food

Raw-material, premix and finished-product cells.

Flour & grain milling

Wheat conditioning, flour and by-product silos.

Food & beverages

Sugar, malt, coffee, cocoa and ingredients.

Plastics & chemicals

Granulates, powders and blending silos.

Biomass & recycling

Pellets, wood chips and recycled materials.

Minerals & building materials

Sand, lime, cement additives and dosing silos.

Normas y cumplimiento

Silo codes by market

Silo pressures depend on the bulk solid and the code. Key references:

Europe

EN 1991-4Actions in silos and tanks – filling, discharge, patch loads
EN 1993-4-1Design of steel silos
EN 1993-1-6Strength and stability of shell structures
EN 14491Dust explosion venting protective systems
EN 1090-2 Certificación WSCExecution – World Steel EXC3 · CE marking

Action assessment class: AAC 1 up to 100 t · AAC 2 · AAC 3 above 10 000 t or demanding discharge
ATEX: Explosion protection per the ATEX directives where dust zones apply

Todas las normas de Europe →

Australia / NZ

AS 3774Loads on bulk solids containers
AS 4100 / AS/NZS 4600Steel and cold-formed steel structures
AS/NZS 1170Wind, snow and earthquake actions
AS/NZS 5131 Certificación WSCFabrication and erection – World Steel certified CC3
AS 1657Platforms, walkways, stairways and ladders

Todas las normas de Australia & New Zealand →

United States

ANSI/ASABE EP433Loads exerted by free-flowing grain on bins
ASCE 7 / IBCWind, snow and seismic loads
AISC 360 / AISI S100Support structure and cold-formed wall design
NFPA 61 / NFPA 68Agricultural and food dust, explosion venting
OSHA 1910Walking-working surfaces and fall protection

Todas las normas de United States →

Asia & Middle East

Owner specificationUsually EN 1991-4 / EN 1993-4-1 for silo actions and design
TCVN 2737 / TCVN 5575Vietnam – loads and steel structures
SBC 301 / SBC 306Saudi Arabia – loads and steel structures
SNI 1727 / SNI 1729Indonesia – loads and steel structures

Resumen solo orientativo: prevalecen la especificación del proyecto, la edición del código adoptada y la autoridad competente.

Ingeniería

Why square works

A circle uses only π/4 – about 79 % – of the square around it. Square cells recover the remaining 21 %, share their walls and can be grouped in any number and size, so several products stay separate in one compact block.

Square silos integrate easily with grinding, pelleting, dosing and bulk load-out, and fit inside or alongside the plant building – the silo structure can carry the roof, floors and conveying equipment.

Ingeniería

Pressures calculated, not assumed

Silo walls and hoppers are designed from the properties of your bulk solid – density, wall friction and flowability – and from the filling and discharge method. We calculate filling and discharge pressures, patch loads and eccentric discharge to EN 1991-4 or AS 3774, with wind, snow, seismic and process loads on top.

Hopper geometry follows the flow behaviour you need, and explosion venting is coordinated with the process designer where dust zones apply.

Ingeniería

From product data to a working silo

One engineering team covers silos, support steel, conveyor structures and the surrounding building. Parts are CNC-cut, punched and folded, coated or galvanized, nested for shipping and marked for assembly layer by layer.

Our supervisors guide the site team through assembly, alignment and sealing, and hand over the silo with a complete dossier.

Especificaciones

Options & finishes

Cells: Square or rectangular, from small dosing bins to large storage cells; any number and arrangement
Walls: Profiled galvanized, smooth coated, or stainless steel for food and sensitive products
Hoppers: Square or round outlets, inspection hatches, level-indicator openings, flow aids by specialists
Roof: Bin roof with machine floor, man hatches, inlets, handrails; insulated or single-skin roof house
Access: Stair towers, ladders, platforms and elevator support steel
Protection: Galvanizing, food-grade coatings or stainless steel; explosion vents coordinated with the process designer

Proceso

How we deliver

1
Product & flow data
Bulk solids, capacities, filling and discharge.
2
Concept
Cell layout, integration with process and building.
3
Calculation
Silo pressures, structure, wind, snow and seismic.
4
Detailed engineering
3D model, drawings and interfaces with equipment.
5
Fabrication
CNC parts, coating or galvanizing, nested packing.
6
Supervised assembly
Layer-by-layer assembly, inspection and handover.

Certificación independiente

Certified fabrication

EN 1090 EXC3 · CEBSI Group The Netherlands B.V. – Notified Body 27972797 CPR 827443

AS/NZS 5131 CC3BSI Group Australia & New Zealand (Benchmark Product Certification)BMP 827566

FAQ

Preguntas frecuentes

Why choose square silos instead of round silos?

Square cells use the whole footprint (a circle uses only about 79 % of its surrounding square), share walls, keep many products separate in one compact block and integrate easily into buildings and process plants.

What is the difference between profiled and smooth-wall silos?

Profiled walls are stiffened by their own profile and are economical for large cells. Smooth walls have stiffeners outside, so the inside is flat – better discharge, no residue and no mixing between cells, ideal for food and sensitive products.

Which standards do you design silos to?

Silo actions to EN 1991-4 and steel design to EN 1993-4-1 and EN 1993-1-6 as standard; AS 3774 for Australia and ANSI/ASABE EP433 for grain in the US where specified – with wind, snow and seismic loads to the local code.

What information do you need for a quotation?

The bulk solids and their properties, required capacity and number of cells, available footprint and height, filling and discharge equipment, site location (wind, snow, seismic) and any dust-explosion requirements.

Do you assemble the silos on site?

Silos are delivered as numbered kits and assembled layer by layer by a local crew under the supervision of World Steel supervisors, or by our erection partners where available.

Planning a silo plant?

Send us your products, capacities and layout – our engineers return a silo concept, calculation basis and a delivered price.

Discuss your silos +84 902 881 833

Condiciones de entrega · Incoterms® 2020

Entregado en las condiciones que necesita

World Steel cotiza en fábrica, franco a bordo o entregado en su puerto u obra. El embalaje de exportación, los documentos y el embarque desde Ciudad Ho Chi Minh forman parte del servicio.

Comparar los Incoterms® 2020 →

FCAFree Carrier FOBFree On Board CFRCost and Freight CIFCost, Insurance and Freight CPTCarriage Paid To CIPCarriage and Insurance Paid To

También por proyecto o bajo pedido: EXW · FAS · DAP · DPU · DDP

Square steel silos, engineered as a system

Every square metre stores product