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large cells, economical
Profiled-wall silos
Single-skin profiled walls stiffened by the profile – economical for large capacities per cell, galvanized or coated.
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.
- ≈ 21 %
- More footprint used than round silos 1 − π/4
- 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
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.
用途
Industries we serve
01
Feed & pet food
Raw-material, premix and finished-product cells.
02
Flour & grain milling
Wheat conditioning, flour and by-product silos.
03
Food & beverages
Sugar, malt, coffee, cocoa and ingredients.
04
Plastics & chemicals
Granulates, powders and blending silos.
05
Biomass & recycling
Pellets, wood chips and recycled materials.
06
Minerals & building materials
Sand, lime, cement additives and dosing silos.
規格とコンプライアンス
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 WSC認証取得Execution – 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
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 WSC認証取得Fabrication and erection – World Steel certified CC3
- AS 1657Platforms, walkways, stairways and ladders
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
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
参考用の概要です――プロジェクト仕様書、採用される基準の版、所轄官庁の判断が優先されます。
エンジニアリング
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.
エンジニアリング
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.
エンジニアリング
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.
仕様
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
- Protection
- Galvanizing, food-grade coatings or stainless steel; explosion vents coordinated with the process designer
プロセス
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.
EN 1090 EXC3 · CE
AS/NZS 5131 CC3FAQ
よくある質問
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.
関連コンテンツ
Netherlands
Germany
Cambodia
Philippines
Planning a silo plant?
Send us your products, capacities and layout – our engineers return a silo concept, calculation basis and a delivered price.
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