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Quanzhou Ridge Steel Structure Co.,Ltd.
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Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

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Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

MOQ : 500 square meters

Delivery Time : 45 days

Span Range : Up to 40 meters

Transport And Load : Container Shipment

Certification : CE,SGS

Service : Design, Manufacture, Delivery

Productname : Building Steel Structure

Life Of Service : More Than 50 Years

Model Number : RS-2601211503

Surface Treatment : Galvanized, Painted, Powder Coated

Surfacetreatment : Galvanized or painted

Payment Terms : L/C,T/T

Primary Framing : H column and beam

Carbon Structural Steel : Q235 Q355

Fireresistance : Up to 2 hours

Price : USD 45~68 square meters

Structure Type : Portal Frame Steel Structure

Supply Ability : 20000 square meters per month

Product Name : Fabricated and Galvanized Steel Structures

Structure : Steel Structure

Roof Insulation : EPS/Firberglass Wool/Rock Wool/PU

Usage : Industrial buildings, warehouses, commercial complexes

Frame : Steel Structure

Accessory : Gutter ;Downspout ;Roof Ventilator

Place of Origin : FUJIAN, CHINA

Purlin Section : Q235 C Channel or Z Channel

Brand Name : QZ RIDGE

Grade : Q235B,Q345B or as per customer's need

Packaging Details : naked

Wall : EPS PU Rookwool Sandwich Panels

Connection : Bolt Connection

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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

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

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

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

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)
  • Ventilation: ridge vents, turbine ventilators, louvered sidewall openings
  • Natural lighting: FRP skylight panels (translucent, UV-stabilized)
  • Insulated sectional doors, high-speed roller doors, aircraft hangar sliding doors
  • Rainwater gutter and downpipe systems
  • Fire protection: intumescent coatings up to 2-hour rating
  • [CTA Button: Download Full Spec Sheet (PDF) →]

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards

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.

Building Steel Structure engineering focused on delivering solutions without compromising strength safety or durability standards


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