Prefabricated Steel Structure Buildings — Engineered, Fabricated,
and Delivered Worldwide
Whether you need a 500 square meter farm shed or a 15,000 square
meter logistics center, the prefabricated steel structure buildings
provided by Quanzhou RIDGE Steel Structure Co., Ltd. combine
China's manufacturing efficiency with full compliance with local
building codes. With 20 years of export experience and serving over
60 countries, we make one commitment: Your steel will be ready when
it arrives.
Key Features
1. Full Code Compliance — Wherever You Build
- We don't ship a "generic" building and hope it passes. Every
structure is engineered to your specific location's requirements:
| Standard | Application Region |
| EN 1090-2 EXC2/EXC3 | Europe, UK, Middle East |
| UKCA / CE Marking | United Kingdom, European Union |
| NBCC + CSA S16 | Canada |
| AISC 360 / ASCE 7 | United States, Caribbean |
| AS/NZS 1170 | Australia, New Zealand, Pacific Islands |
| SANS 10160 / SANS 10162 | South Africa, Sub-Saharan Africa |
- What you get: A full documentation package — structural
calculations, material certificates, weld procedure specifications
(WPS), NDT reports, and declaration of performance (DoP) where
required.
2. Bolt-Together System — No Site Welding
- Every connection in our steel frames is designed for bolted
assembly. Your crew needs:
- A mobile crane or telehandler
- Basic hand tools and torque wrenches
- Our color-coded erection drawing set
- No welding machines. No on-site NDT. No weather delays waiting for
weld inspections.
3. Factory Pre-Assembly Inspection
- Before your steel is packed into containers, we pre-assemble the
first structural bay in our factory yard. This isn't just a visual
check — we:
- Verify all bolt hole alignment across column-to-rafter and
rafter-to-rafter connections
- Check base plate flatness and anchor bolt template dimensions
- Confirm brace lengths and connection angles
- The inspection report — with photos and measurement data — is
included in your shipment documentation. When your containers open
on site, there are no surprises.
4. Custom Engineering for Your Climate
- Not all steel buildings are the same. We design to your actual
environmental loads:
| Load Type | Design Range | Example |
| Snow load | Up to 5.0 kPa | Northern Canada, Scandinavia, Alps |
| Wind speed | Up to 250 km/h (70 m/s) | Hurricane zones, coastal Australia |
| Seismic | Zone 0 to Zone 4 | New Zealand, Japan, Chile |
| Temperature | -45°C to +50°C | Arctic to desert environments |
5. Corrosion Protection That Lasts
- Steel only lasts if it's protected. Our standard finish is hot-dip
galvanizing to ≥ 85μm zinc thickness, tested to ISO 1461. For
coastal or aggressive environments, we offer:
- Heavy galvanizing (≥ 140μm)
- Duplex system: galvanizing + epoxy primer + polyurethane topcoat
- Stainless steel fasteners (A2-70 / A4-80 grade) for critical
connections
- Corten (weathering) steel upon request
About us
In-house roll-forming & fabrication – No middleman, direct quality control.
Full engineering package – Including structural calculation, foundation drawing, and
assembly manual.
Global shipping experience – Containers optimized, CNF/CIF to over 40 countries.
12-month warranty against corrosion & structural defects.
| Item | Material | Description and surface process |
| Main steel frame | Column and Beam | Q235 or Q355 | H section steel with two coats of mid-gray paint |
| Purlin | Q235 or Q355 | Galvanizd C or Z type steel |
| Connecting Pieces | Tie tube | Q235 | Circular Tube with two coats of mid-gray paint |
| Knee-Bracing | Q235 | L50*4 Galvanizd angle steel |
| Strutting piece | Q235 | φ12 Galvanizd Circular Tube |
| Column Bracing | Q235 | Circular Tube with two coats of mid-gray paint |
| Horizontal Bracing | Q235 | Circular Tube with two coats of mid-gray paint |
| Casing | Q235 | φ30*2.5 Galvanized Circular Tube |
| Door and Window | Item | Description |
| Door | Roller shutter door or Sliding door |
| Window | PVC Window or aluminum alloy window |
| Other parts | Ventilating device | Fan,Ventilation window |
| Bolt | Foundation bolt,High strengthen bolt,Normal bolts |
| Skylight | Yx-840 Glass Fiber Reinforced Plastics |
| Out/Inner ridge tile | 0.50mm Color sheet |
| Crane beam | Q235 or Q345 H section steel with two coats of mid-gray paint |
Our main hardware and equipment
rock wool production line, Frame CAD light steel keel production
system, modern CNC C-shaped steel composite plate production line,
plasma cutting machine, shearing machine, uncoiling machine, shot
blasting machine, intersecting line cutting machine, plate rolling
machine , Submerged arc welding machine, CNC plane drill, SKLH
gantry type automatic welding machine, SHHJ flange correction
machine, 3D CNC cutting machine, etc.
We take continuous testing during the production process and
quality inspection of the finished products to strictly ensure that
the finished products comply with various countries.
Frequently Asked Questions
- How long does it take from order to delivery?
- Typical timeline: design & engineering 15–25 working days +
fabrication 25–50 working days + ocean freight (varies by
destination; e.g., 22 days to West Africa, 30 days to Europe, 35
days to East Coast North America). Most projects arrive on site
within 10–14 weeks of order confirmation.
- Can you handle the structural design and calculations?
- Yes. Our in-house engineering team produces a complete structural
package — frame analysis, connection design, foundation reaction
tables, and anchor bolt layouts — referenced to your local building
code. We can also coordinate with your local engineer of record for
plan review and permit submission.
- What about installation? Do you provide site supervision?
- We strongly recommend our site supervision service for first-time
clients: an experienced erection supervisor travels to your site to
guide your local crew through the assembly. For repeat clients with
trained crews, the bolt-together system is designed for
self-erection using our color-coded manual.
- Do you provide CE / UKCA certification?
- Yes. Our fabrication facility holds EN 1090-2 EXC3 certification
(the highest execution class for steel structures). We issue a
Declaration of Performance (DoP) and CE/UKCA marking for all
shipments to the European Union and United Kingdom.
- What is the minimum order?
- There is no fixed minimum — we handle everything from a single 200㎡
farm shed to a 30,000㎡ multi-building industrial park. Pricing per
square meter improves with volume, but we treat every project with
the same engineering rigor.
- How is the steel packed and shipped?
- All components are bundled, labeled, and containerized with a
detailed packing list keyed to the erection drawings. Bolts and
small accessories are packed in clearly marked plywood crates. We
use export-grade fumigated timber dunnage and VCI (volatile
corrosion inhibitor) wrapping for ocean freight.
