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−18 to −25 °C
Frozen distribution warehouses
High-bay frozen stores with racking, insulated docks and roof plant – the core of food and pharma logistics.
Solution · Cold storage & frozen warehouses
Cold stores that keep the cold in
Chilled, frozen and blast-freezer warehouses with steel frames outside the thermal envelope, continuous insulated panels, suspended ceilings and roof plant platforms – engineered with your refrigeration contractor and fabricated under EN 1090 EXC3 and AS/NZS 5131 CC3.
- +4 to −40 °C
- Chill, frozen and blast rooms
- 100–200 mm
- Typical PIR panel thickness
- Box-in-box
- Frame outside the cold
- EXC3 · CC3
- Certified fabrication
Thermal continuity is a structural decision
In a cold store every place where steel crosses the insulation is a cold bridge, and every leak in the vapour barrier becomes ice. That is why the structure of a cold store is designed differently from an ordinary warehouse: the main frame sits outside the insulated box or is wrapped by it, ceilings hang from the roof steel through sealed penetrations, and the floor of a freezer is protected against frost heave.
World Steel designs and fabricates the steel frame, roof and wall framing, ceiling hangers, plant platforms and insulated panel support for chilled and frozen warehouses – coordinated with the refrigeration contractor, the panel supplier and the racking supplier, so the whole building works as one envelope.
Building types
Cold storage types
From a single chilled room to automated frozen distribution hubs.
−18 to −25 °C
frame outside
Box-in-box cold stores
An external portal frame carries the weather envelope; the insulated room is built inside with a hung ceiling and no steel in the cold.
freezer · chiller · ante-room
Multi-temperature facilities
Freezers, chillers and temperature-controlled docks under one roof, with insulated doors and separated thermal zones.
grating · handrails
Roof plant platforms
Steel platforms for condensers, evaporative coolers and piping, supported through flashed roof penetrations with safe access.
应用领域
Who we build for
01
Food distribution
Frozen and chilled distribution centres for retail chains.
02
Seafood & meat
Processing plants with blast freezers and cold stores.
03
Fruit & vegetables
Controlled-atmosphere and chilled packhouses.
04
Dairy & beverages
Chilled warehouses and loading halls.
05
Pharma & healthcare
GDP temperature-controlled warehouses.
06
Ports & airports
Reefer-cargo and perishables terminals.
规范与合规
Designed to the codes of your market
Structure and envelope follow the building codes of the destination; refrigeration safety follows its own standards. Key references:
United States
- IBC / ASCE 7Building code and loads, incl. ceiling and plant collateral loads
- AISC 360 / AISI S100Steel and cold-formed steel design
- ASHRAE 15Safety standard for refrigeration systems
- IIAR 2Design of safe closed-circuit ammonia refrigeration systems
- FM 4880Fire performance of insulated panels (often required by insurers)
- Fabrication
- IAS AC472 accreditation MB-268 – IBC approved fabricator
Australia / NZ
- AS/NZS 1170 / AS 4100Actions and steel structures
- AS/NZS 5149Refrigerating systems and heat pumps – safety
- AS/NZS 5131 WSC 已认证Fabrication and erection – World Steel certified CC3
- NCCFire and energy requirements for the envelope
- Panels
- Panel fire performance per NCC and the insurer (e.g. FM-approved cores)
Europe
- EN 1991 / EN 1993Actions and steel structures
- EN 14509Self-supporting double-skin metal-faced insulating panels
- EN 378Refrigerating systems and heat pumps – safety and environment
- EN 13501-1Reaction-to-fire classification
- EN 1090-2 WSC 已认证Execution of steel structures – CE marking
- Conformity
- CE marking – World Steel FPC certificate 2797 CPR 827443
Vietnam
- TCVN 2737 / TCVN 5575Loads and steel structures
- QCVN 06:2022/BXDFire safety – panel cores and compartments
- TCVN 6104Refrigerating systems – safety (ISO 5149)
- TCVN 170:2007Fabrication, assembly and acceptance
- Approvals
- Fire design approval (PCCC) and refrigeration safety per the plant designer
摘要仅供参考——以项目技术规格书、所采用的规范版本及主管机构要求为准。
工程设计
Box-in-box: steel stays warm
In a box-in-box cold store the portal frame, purlins and girts stay on the warm side. The insulated walls stand on the slab, the ceiling hangs from the roof steel on a grid of hangers, and only small, sealed and insulated penetrations cross the envelope.
The result is fewer cold bridges, no condensation on structural steel, easy future re-configuration of rooms – and a structure that is designed for the real loads of ceilings, evaporators, lighting and sprinklers.
工程设计
Plant, piping and access, designed in
Condensers, coolers and refrigerant piping add heavy, vibrating loads to roofs and ceilings. We design dedicated plant platforms and pipe supports, fabricated with grating, handrails and ladders, so maintenance is safe and the roof stays watertight.
Corrosion protection is chosen for the condensation and wash-down conditions of food plants – galvanized secondary steel, epoxy systems or duplex coatings.
技术规格
Options & finishes
- Structure
- External portal frames (box-in-box), internal frames wrapped in insulation, multi-span for large freezers
- Envelope
- PIR / PUR or mineral-wool panels, 100–200 mm and more, food-safe coatings, cam-lock or tongue-and-groove joints
- Ceilings
- Walk-on or non-walk-on insulated ceilings hung from roof steel, insulated hanger penetrations
- Floors
- Insulated slabs with heated or ventilated sub-base under freezers (by the civil contractor)
- Docks & doors
- Insulated docks, framed openings for sliding and high-speed cold-room doors, ante-rooms
- Plant support
- Roof plant platforms, pipe racks, evaporator supports, access stairs and ladders
流程
How we deliver
- 1
Temperatures & layout
Rooms, temperatures, racking, docks and plant locations.
- 2
Coordinated design
Frame, envelope, ceiling and plant loads with the refrigeration designer.
- 3
Certified fabrication
Frames, hangers, platforms and accessories with traceable QC.
- 4
Envelope package
Panels, trims and sealing details from qualified panel suppliers.
- 5
Shipping & erection
Containerised kits, erection drawings and supervision.
- 6
Handover
Quality dossier, as-built drawings and inspection guidance.
EN 1090 EXC3 · CE
AS/NZS 5131 CC3
IAS AC472FAQ
常见问题
Why put the steel frame outside the insulated box?
Steel inside a freezer must be insulated around, and every member crossing the envelope is a cold bridge that can cause condensation, ice and energy losses. With an external (box-in-box) frame the insulated room is continuous and the steel stays warm and dry.
Which panel thickness is needed?
As a guide, about 100–125 mm for chilled rooms, 150–200 mm for frozen rooms at −18 to −25 °C and 200 mm or more for blast freezers. The final thickness comes from the thermal design, energy targets and the panel supplier.
Do you design the refrigeration system?
No – refrigeration is designed by a specialist contractor. We coordinate with them to carry plant, piping, evaporator and ceiling loads, and provide platforms and supports for their equipment.
How is frost heave under freezer floors prevented?
Freezer slabs sit on insulation over a heated or ventilated sub-base that keeps the ground above freezing. The floor is designed by the civil engineer; our frame and wall bases are detailed to suit it.
Which fire performance do the panels need?
It depends on the code and the insurer: EN 13501-1 classes in Europe, NCC requirements in Australia, IBC and often FM approval in the US, QCVN 06 in Vietnam. We specify panels that meet the project's requirement.
United Arab Emirates
Philippines
Planning a cold store?
Send us the room temperatures, layout and design code – our engineers return a concept, structural options and a delivered price for frame and envelope.
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