One Stop Service Prefab Steel Structure Design Drawing and Materials Supply for Global Projects

• Customization: Available
• Connection Form: Bolt Connection or Welding Connection
• Feature: Anti-Corrosion, Earthquake Resistance, Easy To Install, High Intensity, Recyclable
• Model NO.: steel structure
• Install: Online Guidance
• Steel Grade: Q355b, Q235B (Equivalent to ASTM A572, S355jr)
• Main Steel Frame: Welded/Hot Rolled H Beam, Box Column
• Secondary Structure: C & Z Section Purlin, Tie Rod, Bracing
• Surface Treatment: Sand Blasting SA2.5 & Anti-Rust Painting
• Design Capacity: Tekla, Pkpm, Autocad, 3D Model Sharing
• Wind & Earthquake: Wind: 120-150km/H; Earthquake: Grade 8
• Life Time: More Than 50 Years
• Supply Ability: 3,000 - 5,000 Tons / Month
• Installation Guide: Complete Setup Drawings + Online Video Support
• Shipping Package: Steel Rack Packing for Heavy Beams (Easy Unload)
• One-Stop Service: Full Set Structure with All Bolts and Accessories
• Transport Package: Standard Shipping Packaging
• Specification: Customized Based on Customer's Drawing
• Trademark: YDHC
• Origin: Chongqing China
• HS Code: 730890
• Production Capacity: 5000 Tons / Month

Product Description

High-Performance Prefabricated Steel Structure Buildings

Build your industrial or commercial space faster and stronger with our prefabricated steel solutions.

Versatile Applications: Ideal for large-span warehouses, multi-story factories, and agricultural sheds.
Rugged Durability: Corrosion-resistant surface treatment (Hot-Dip Galvanized or Epoxy Painting) ensuring a 50+ year service life.
Rapid Installation: Factory-prefabricated components with precision cutting for seamless bolt-up assembly.
Global Standards: Material grades Q235B/Q355B (Equivalent to S235JR/S355JR or ASTM A36/A572).
Transform your project with a safer, greener, and more efficient structural system.

Full-Kit Pre-Engineered Building Solutions

We deliver a complete building envelope. As shown in the diagram, our supply scope covers all structural elements:

Primary Frames: Rigid columns and rafter beams.

Secondary Systems: Purlins, girts, and bracing.

Cladding & Trim: Roof sheeting, wall panels, corner trims, and ridge vents.

Functional Parts: Skylights, louvers, and walk doors.

Everything is pre-cut, pre-drilled, and ready for rapid bolt-up installation.

Product Specifications

No.	Category / Component	Technical Specifications	Material / Standard	Surface Treatment
I	Main Steel Frame
1	Steel Structure Frame	Welded H-Section Beams & Columns (Built-up sections via Submerged Arc Welding, Pre-assembled testing)	Q235B / Q355B (Equivalent to ASTM A36 / A572 Gr.50, S235JR / S355JR)	Shot Blasting to Sa 2.5 + Epoxy Zinc-Rich Paint (DFT $\ge$ 80$\mu$m) OR Hot-Dip Galvanized
2	Wall / Roof Purlin	Cold-Formed C-Section or Z-Section Purlins	Q235B / Q355B (S235JR / S355JR), High-Tensile DX51D / S350GD+Z	Pre-galvanized / Hot-dip galvanized (Zinc coating: $\ge$ 120g/m² to 275g/m²)
II	Bracing System
1	Tie Rod	Circular Hollow Section (CHS Pipe): Ø89×3.0mm / Ø114×3.5mm / Ø158×4.0mm	Q235B (ASTM A53 Gr.B)	Anti-Rust Primer & Finish Painting or Hot-Dip Galvanized
2	Flexible Bracing	Solid Round Bar: Ø16mm / Ø18mm / Ø20mm with Turnbuckles	Q235B (S235JR)	High-durability Paint or Electro-galvanized / HDG
3	Sag Rod	Solid Round Bar / Steel Rod: Ø12mm / Ø14mm / Ø20mm	Q235B	Galvanized for maximum corrosion resistance
4	Brace Rod	Flange / Web Bracing, Angle Steel, or Steel Pipe (Ø32mm)	Q235B / Q355B	Galvanized or Painted
5	Knee-Brace	Angle Steel: L50×50×4mm / L50×50×5mm	Q235B (S235JR)	Anti-Rust Painted or Hot-Dip Galvanized
III	Cladding & Roofing
1	Roof & Wall Panel Option A	Corrugated Single Steel Sheet (Thickness: 0.326mm - 0.70mm)	High-Tensile Steel (G300/G550, DX51D)	Aluzinc Coated / PPGI / PPGL (PE/PVDF Coating)
2	Roof & Wall Panel Option B	Insulated Sandwich Panel (Core thickness: 50mm/75mm/100mm/150mm)	Core: EPS / Rockwool / Glasswool / Polyurethane (PU/PIR)	Double-sided Color Steel Cladding Sheets
3	Roof/Wall Trimming	Complete Eaves & Ridge System: Ridge caps, Gable trimmings, Corner flashings (0.4mm - 0.5mm)	Color Coated Galvanized Steel	Matches Wall/Roof Panel Color
IV	Windows & Doors
1	Window	PVC Frame or Aluminum Alloy Frame Windows	Single Glazing / Double Insulated Glazing	Fixed, Sliding, or Top-hung / Swing Type
2	Door	Industrial Rolling Shutter Door / Sliding Sandwich Panel Door	Galvanized Steel / Aluminum Frame	Motorized (Electric Remote Control) or Manual Operation
V	Accessories & Vent
1	Connection Bolts	Full Structural Fasteners: High-Strength Bolts (Grade 8.8 / 10.9), Foundation Anchor Bolts, Turnbuckles, Shear Studs	Carbon Steel / Alloy Steel	Black Phosphated, Dacromet, or Hot-Dip Galvanized
2	Gutter	Exterior or Interior Gutter System (Thickness: 0.5mm - 1.5mm)	Galvanized Steel Sheet / Stainless Steel 304 Grade	High corrosion resistant finish
3	Downpipe	Rainwater Downspout: Ø110mm / Ø160mm	Premium PVC / Galvanized Steel Pipe	Standard White/Blue/Grey color
4	Roof Ventilator	Unpowered Roof Turbine Ventilator (Diameter: Ø600mm)	Stainless Steel 201/304 or Galvanized Steel	Natural wind-driven, maintenance-free

Professional Design & Engineering Support

Custom Design Service: We provide full structural analysis and 3D modeling tailored to your site conditions.
Accept Client's Drawings: Send us your architectural or structural blueprints for an accurate, fast quote.
Precision Guaranteed: All components are fabricated according to the high-precision shop drawings shown above, ensuring a 100% accurate fit during on-site assembly.

Have a project in mind? Contact us to share your requirements or drawings now!

SUCCESSFUL PROJECT CASES

Factory Show

Direct Factory: Professional Steel Structure Manufacturer

Factory Scale & Capacity
Large-Scale Production: Thousands of tons monthly output with multiple high-precision H-beam lines.
Advanced Tech: CNC multi-head cutting & automatic submerged arc welding (AWS/ISO certified).
Export Excellence: 15+ years of experience shipping to 50+ countries.

[Why Choose Us?]

Top Quality: Materials meet ASTM A36/A572 & S235/S355JR standards.
Precision Design: Free structural optimization using Tekla & AutoCAD.
Best Value: Direct factory pricing—no middlemen, no hidden costs.
Seaworthy Packing: Expert loading in 40'HQ/OT/FR for maximum safety.
[Ready to Quote?] Send us your Building Size (LxWxH) or Drawings now. Get a professional technical proposal and a firm quote within 24 hours.

Packaging & Shipping

FAQ

Q1: Can you provide a custom design for my project?

 A: Yes! We provide one-stop custom designs using Tekla and AutoCAD. We calculate the structure based on your local wind speed, snow load, and seismic requirements to ensure safety.

Q2: What quality standards do you follow?

A: We use high-strength Q235B/Q355B steel (equivalent to ASTM A36/A572 or S235/S355JR). All fabrication follows ISO 9001 and CE certification standards.

Q3: How difficult is the installation?

 A: Very easy. Our system is 100% bolt-connected with no on-site welding required. We provide a complete set of installation drawings and a detailed packing list for your local team.

Q4: What info do I need to provide for a quick quote?

A: Please send us the Building Size (LxWxH), your Local Wind Speed, and the intended Usage (Warehouse/Workshop). We will provide a formal quotation within 24 hours.