Modular Integrated Building System — The Chinese Steel Building Kits Supplier You Can Trust

Most "modular building" suppliers in China sell shipping containers with windows cut into them. Our modular integrated building system is a structural steel building — engineered, fabricated, insulated, wired and plumbed in our factory — that ships in standard containers and assembles on-site in days. We built the Chinese Antarctic Research Station with this system. If it works at -40C in a polar hurricane, it works at your site.

Why Our Modular System Is Different

Not a Container Conversion. An Engineered Building System.

The difference between a container conversion and our modular integrated building system is the difference between a garden shed and a house. Container conversions use existing steel boxes that were never designed as habitable structures — they have no insulation, no structural redundancy, no fire rating and no acoustic separation. Our modules are purpose-built steel structures designed from the outset as buildings.

Each module is a complete structural unit: cold-formed or hot-rolled steel frame, insulated wall panels, integrated electrical conduit, plumbing rough-ins, windows and doors. Modules connect on-site via structural bolted connections. The result is a building that meets real building codes, not a box that someone lived in.

Proof of Concept

Built for Antarctica. Available for Your Project.

Chinese Antarctic Ross Sea Research Station modular building by Permanent Steel Structure

The Chinese Antarctic Ross Sea Research Station is the ultimate proof of our modular integrated building system. The requirements:

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-40C survival: Insulation and heating systems that function in extreme cold without thermal bridging
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200+ km/h wind: Structural anchorage and aerodynamic form to resist Category 5 equivalent wind
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Container shipping: Every module fits in a standard 40ft container — shipped by vessel to Antarctica
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Rapid assembly: Small team, short summer window — modules bolt together in days, not months

Your project may not face polar conditions. But the engineering margin built into this system means it will perform reliably in any climate on Earth.

System Components

What Is in a Modular Building Kit

Structure

Steel Frame Module

Cold-formed or hot-rolled steel frame: columns, beams, floor joists and roof structure. Welded connections in-shop, bolted connections between modules on-site. Each module is a self-contained structural unit — when bolted to adjacent modules, the combined structure acts as a single building.

  • Frame: cold-formed C / hot-rolled H-beam
  • Module size: up to 12m x 3.3m x 3.5m (container-optimized)
  • Connection: high-strength bolted
  • Seismic: designed per GB 50011
Envelope

Walls, Roof & Floor Panels

Insulated sandwich panels for walls and roof — PIR, mineral wool or VIP core between pre-painted steel skins. Floor: structural steel deck with concrete topping or insulated panel. All panels are factory-installed — no field insulation work, no thermal bridges, no gaps.

  • Wall: 75-150mm insulated panel
  • Roof: 100-200mm insulated panel
  • Floor: steel deck + insulation
  • Thermal: 0.15-0.35 W/m2K
MEP

Electrical & Plumbing

Conduit, wiring, junction boxes, switches and outlets factory-installed in wall cavities. Plumbing rough-ins for water supply, drainage, HVAC ductwork. Modules connect via quick-connect fittings — no site welding or pipe threading. A licensed electrician connects the building to the grid at the main panel.

  • Electrical: complete to outlet level
  • Plumbing: PEX/PPR supply, PVC drain
  • HVAC: ductwork or split-system stub
  • Connection: plug-and-play fittings
Finishes

Interior & Exterior Finishes

Interior walls: pre-painted steel or gypsum board on steel studs. Flooring: vinyl, tile or engineered wood factory-installed. Windows: double-glazed aluminum or uPVC. Doors: steel or wood, pre-hung. Exterior: panels in the specified color and profile. Move-in ready.

  • Interior: pre-painted steel / gypsum
  • Flooring: vinyl / tile / wood
  • Windows: double-glazed aluminum
  • Exterior: PVDF coated panels
Applications

Where Modular Buildings Win

Modular steel building for remote construction camp by Permanent Steel Structure Remote Sites

Mining & Energy Camps

Worker accommodation, offices and mess halls for remote mining, oil & gas and construction sites. Shipped in containers, assembled in days, relocated if the project moves. Self-contained with off-grid power options.

Modular steel building for disaster relief housing by Permanent Steel Structure Emergency

Disaster Relief Housing

Rapidly deployable housing for post-disaster recovery. Modules stockpiled, shipped and assembled on prepared foundations within days. Insulated, electrified, plumbed — real homes, not tents.

Modular steel school building by Permanent Steel Structure Public

Schools & Clinics

Modular classroom blocks, health clinics and community buildings for fast-growing or underserved areas. Designed to building code, not to minimum habitability standard. Permanent, not temporary.

What We Deliver

Your Building Kit, Shipped Complete

When you order a modular building system from us, you receive a complete package — not a pile of steel that needs a contractor to figure out. Here is what arrives in your containers.

Pre-Assembled Modules

Steel frame, walls, roof, floor, windows, doors, electrical, plumbing — all factory-installed. Each module is a room, not a collection of parts.

Assembly Drawings

Step-by-step assembly instructions with module numbering, connection details and torque specifications. A competent crew can follow them without an engineer on site.

Connection Hardware

All bolts, washers, nuts, sealants, gaskets and flashings — pre-counted, pre-bagged and labeled by connection location. No sourcing, no missing parts.

Documentation Package

Material certificates (MTC), welding procedure specifications, NDT reports, structural calculations, packing list, CO/Form A — everything for customs clearance and building code compliance.

Need a Steel Building Kit?

Tell us the building type, number of units, location and site conditions. We will provide a modular system design, container loading plan and quotation within 24 hours.

Request Modular Building Quote