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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
Technical Specifications
Primary Steel Frame
Component
Material
Standard
Columns
Q355B / S355JR welded H-section
GB/T 11263 / EN 10025-2
Rafters
Q355B / S355JR welded H-section (tapered)
GB/T 11263
Base plates
Q235B / S235JR, 16–25mm thick
GB/T 3274
Connection bolts
Grade 10.9 high-strength friction-grip bolts
GB/T 1228 / EN 14399
Secondary Structure
Component
Material
Specification
Purlins
Q345B / S350GD cold-formed Z or C section
GB/T 6725 / EN 10149-2
Girts
Q345B / S350GD cold-formed C section
GB/T 6725
Bracing (roof/wall)
Ø20–25mm round steel with turnbuckle
GB/T 699
Tie rods
Ø12–16mm round steel
GB/T 699
Enclosure System
Type
Thickness
Application
Thermal Performance
Single-skin steel sheet
0.4–0.6mm
Agricultural, open-sided
Minimal
EPS sandwich panel
50–100mm
Warehouses, workshops
U = 0.40–0.70
Rock wool sandwich panel
50–150mm
Fire-rated, public buildings
U = 0.25–0.45
PIR sandwich panel
50–150mm
Cold storage, cold climate
U = 0.18–0.25
Single-skin + glass wool blanket
50–100mm + liner sheet
Large-span, budget-sensitive
U = 0.35–0.50
Optional Features
Overhead crane runway beams (up to 50T capacity)
Mezzanine floor systems (steel deck + reinforced concrete)
Fire protection: intumescent coatings up to 2-hour rating
[CTA Button: Download Full Spec Sheet (PDF) →]
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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
1998
Total Annual:
40000000-50000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Quanzhou RIDGE Steel Structure Co. Ltd. was established in Quanzhou China, a professional manufacturer of steel structure with 20 years exporting experience, finished 1820 projects total 7600000 square meter.We have 2 modern factories with a total area of 21000 m2,20000 tons aunual produce...
Quanzhou RIDGE Steel Structure Co. Ltd. was established in Quanzhou China, a professional manufacturer of steel structure with 20 years exporting experience, finished 1820 projects total 7600000 square meter.We have 2 modern factories with a total area of 21000 m2,20000 tons aunual produce...
