Construction Metal Fabrication — Built to Code, Delivered On-Site
The construction industry doesn’t tolerate delays or rework — every anchor plate, every welded beam-to-column connection, every architectural panel must arrive on-spec, on-time, and ready to install.
Conwhole has been supplying custom metal components to construction contractors, structural steel fabricators, and architectural firms for over 25 years. Our capabilities span the full range of construction-grade metal fabrication: heavy plate cutting and forming for structural components, certified welding for load-bearing connections, CNC machining for precision anchor assemblies, and a managed surface finishing partner network for hot-dip galvanizing, powder coating, and weathering steel treatment.
What sets us apart for construction clients: mill-certified steel with full traceability, weld procedure specifications (WPS) compliant with AWS D1.1 / EN 1090, fabrication to ASTM A36 / A572 / A992 / EN 10025 / GB standards, and one-stop delivery including hot-dip galvanizing.
Key Takeaways:
- Standards compliance: ASTM A36 / A572 / A992, EN 10025, GB/T 700
- Welding certifications: AWS D1.1, EN 1090-1/2 EXC2-EXC3, ISO 9606-1
- Hot-dip galvanizing per ASTM A123 / ISO 1461 / GB/T 13912
- Plate cutting capacity up to 100mm thickness
- Structural member length up to 12,000 mm
- Material traceability with mill certificates on every lot
- Typical lead time: 3–6 weeks fabrication, +1–2 weeks galvanizing
Welding & Assembly for Construction
Certified welding for structural steel connections, load-bearing assemblies, and architectural fabrications.
| Welding Processes | MIG/MAG, TIG, SAW (Submerged Arc), Stick Welding, Robot Welding |
| Welding Standards | AWS D1.1, EN 1090-1/2 EXC2-EXC3, ISO 9606-1, ISO 15614-1, GB 50661 |
| Materials Welded | Carbon Steel, HSLA, Weathering Steel, Stainless Steel |
| Max Component Size | 12,000 × 3,000 × 1,500 mm (Long beams, columns) |
| Welding Positions | All positions (Flat, Horizontal, Vertical, Overhead) |
| Post-Weld Services | Stress Relief, Weld Inspection (VT, UT, MT, PT), Galvanizing-Ready Finish |
Sheet Metal Fabrication for Construction
Plate cutting, forming, and bending for construction connectors, panels, covers, trims, and custom sheet metal parts.
| Cutting Methods | Fiber Laser, Plasma (via partner), Press Brake Bending |
| Sheet/Plate Max Size | 6,000 × 2,500 mm |
| Plate Thickness | 0.8 – 100 mm (steel) |
| Typical Parts | Panels, trims, flashings, covers, brackets, cladding pieces |
| Finish Options | Galvanizing-ready, powder coat, paint, weathering steel |
| Tolerance | ±1.0 mm laser/plasma, ±0.5 mm formed parts |
Tube / Round-Part Special Fabrication for Construction
For curved architectural pieces and round visual components used in construction projects.
| Core Processes | Tube Laser Cutting, Metal Spinning |
| Profile Max Length | 12,000 mm |
| Applicable Parts | Curved covers, round trims, end caps, decorative rings, special visual components |
| Tolerance | ±1.0 mm laser/plasma, ±0.5 mm on formed round parts |
| Surface Prep | Galvanizing-ready, powder coating, paint, weathering steel finish |
| Use Case | Special-shaped parts, low-volume architectural components |
Typical Construction Parts We Manufacture
| Component Category | Examples | Key Processes |
|---|---|---|
| Anchor & Base Plates | Column base plates, anchor bolts, embed plates, foundation templates | CNC Machining, Welding, Hot-Dip Galvanizing |
| Structural Connectors | Gusset plates, shear tabs, end plates, stiffener plates, moment connections | Stamping, Welding, Laser/Plasma Cutting |
| Beams & Columns | H-beams, I-beams, hollow section columns, tapered columns, base plates | Welding, CNC Machining |
| Architectural Panels | Facade panels, perforated screens, cladding brackets, sun-shading louvers | Laser Cutting, Bending, Powder Coating |
| Roofing & Cladding Hardware | Z-purlins, C-purlins, roof clips, wall girts, flashing | Roll Forming, Stamping, Galvanizing |
| Stairs & Railings | Stair stringers, handrail brackets, baluster connectors, landing frames | Welding, CNC Machining, Galvanizing |
Why Choose Conwhole for Construction Metal Parts?
🏗️ One-Stop Fabrication + Galvanizing
In-house cutting, forming, welding, and CNC machining — combined with our managed hot-dip galvanizing partner network. You receive ready-to-install parts with the spangled zinc finish, no need to coordinate 3 suppliers.
📋 Code-Compliant Welding
Weld Procedure Specifications (WPS) and Procedure Qualification Records (PQR) certified to AWS D1.1, EN 1090-1/2 EXC2-EXC3, and GB 50661. Your structural engineer gets the documentation needed for inspection sign-off on day one.
⚙️ Heavy-Plate Capability
Press brake up to 400 tons, plasma cutting (via partner) up to 100mm plate, structural profile cutting up to 12,000mm long. We handle the heavy structural members most fabrication shops decline.
🎨 Architectural Finish Options
Hot-dip galvanizing per ASTM A123, powder coating in custom RAL colors, weathering steel (Cor-Ten) with controlled patina, brushed stainless. We deliver structural strength with architectural-grade aesthetics.
Frequently Asked Questions — Construction Metal Parts
Q1: What’s your typical lead time for construction metal parts?
3–6 weeks for fabrication depending on complexity and quantity, plus 1–2 weeks for hot-dip galvanizing. Rush programs can be expedited to 2–3 weeks total. We coordinate the entire chain so you receive ready-to-install parts on a single delivery date.
Q2: Can you provide weld procedure specifications (WPS) for our project?
Yes. We issue WPS and PQR (Procedure Qualification Records) tailored to your project requirements — AWS D1.1 for North American projects, EN 1090-1/2 EXC2 or EXC3 for European projects, GB 50661 for Chinese projects. Each WPS includes welding parameters, filler metal specs, and qualified joint details.
Q3: What steel grades do you work with?
We fabricate from structural steel grades including ASTM A36, A572 Gr.50, A992, A588 (weathering), EN 10025 S275JR/S355JR/S355J0/S355J2, GB Q235/Q355, and stainless 304/316/316L for architectural applications. We source from mills with full MTC (Mill Test Certificate) traceability.
Q4: Do you offer hot-dip galvanizing, or do we need to source it separately?
We offer hot-dip galvanizing as part of our one-stop service through our managed finishing partner network. Parts are fabricated, then transferred to our certified galvanizing partner for ASTM A123 / ISO 1461 / GB/T 13912 compliant zinc coating. We coordinate the entire flow and deliver ready-to-install galvanized parts.
Q5: Can you handle large structural members like long beams and tall columns?
Yes. Our fabrication facility handles structural members up to 12,000 mm (12 meters) in length and up to 100 mm plate thickness. For oversized items requiring special transport, we can deliver in segments with bolted field connections and matching splice plates.
Q6: What’s the minimum order quantity for construction parts?
We have no strict MOQ — from single prototype anchor plates to 10,000+ production runs. Cost-effectiveness typically improves at 50+ pieces for custom fabrications, and 500+ for rolled-formed components.
Q7: Do you ship directly to construction sites?
Yes. We ship directly to your job site, fabrication shop, or warehouse. We support EXW, FOB, CIF, and DDP terms. For domestic Chinese projects we offer on-site delivery with crane-friendly packaging. For international projects we handle export crating, container loading, and full documentation.
Q8: Can you match the architectural finish specified by our design team?
Yes. We work with architects’ specifications including: hot-dip galvanizing (ASTM A123 standard), powder coating in any RAL color, weathering steel (Cor-Ten A/B) with controlled patina, brushed/polished stainless steel 304/316, and architectural-grade PVDF coating for aluminum panels. We provide finish samples for architect approval before production.