Welded H Beam Column Steel Frame Q355B Fabrication Structural Steel Fabrications

A welded H beam is built up from three steel plates joined by continuous submerged arc welding (SAW). The result is a section with a straight web, parallel flanges, and a smooth weld bead. Because it is welded rather than rolled, the web height, flange width, and plate thickness can follow your drawing exactly, including tapered and variable depth members.

We use Q355B as the standard grade. It is a low-alloy high-strength steel with a minimum yield strength of 355 MPa, roughly 40% higher than Q235B. This means a lighter member can carry the same load, reducing frame weight, foundation load, and freight costs. Other grades such as Q235B, Q345B, S355JR, S355J2, ASTM A36, and A572 Gr.50 are available on request.

Each member leaves the workshop ready to bolt. Holes are CNC drilled to your bolt layout, copes and notches are cut, and base plates, end plates, gusset plates, and stiffeners are welded on. Every piece carries a mark matching the erection drawing. Surface protection is either shot blasting with primer/topcoat, or hot-dip galvanizing between 65 and 200 microns for outdoor and coastal sites.

Main Applications: Workshop and warehouse portal frames, mezzanine floors, crane runway girders, roof trusses, equipment support frames, and prefabricated steel buildings.

🌟 Why Customers Choose It

• Exact Size, No Compromise: A welded section follows your drawing exactly, so you avoid oversized standard beams, wasted steel, and last-minute site modifications.

• Higher Strength per Ton: Q355B at 355 MPa yield means a smaller section does the same job, cutting steel weight, transport volume, and foundation load.

• Fits on Site First Time: CNC drilling and piece marking matched to the erection drawing mean the site team bolts the frame together without reaming holes or reworking connections.

• Verifiable Weld Quality: Main seams are welded by SAW, welders are certified to EN ISO 9606, and UT or MT can be arranged whenever your specification requires.

• Complete Documentation: Mill Test Certificates (MTCs), welding procedures, welder certificates, galvanizing reports, and packing lists travel with the goods, ensuring smooth customs clearance and client approval.

📊 Technical Specifications

🛠️ Fabrication Scope & Workflow

1. Engineering Review: Send a drawing, BIM model, or member list. Our engineers return a marked-up quotation within two working days.

2. Processing: Plate cutting, edge preparation, H beam assembly, and submerged arc welding.

3. Machining: Straightening, CNC drilling/slotting, end milling, camber, and splice preparation.

4. Fit-up: Base plates, end plates, gussets, stiffeners, and shear studs are welded on. Trial assembly can be arranged for complex frames.

5. Finishing: Shot blasting with primer/top coat in your RAL color, hot-dip galvanizing, or a duplex system.

6. Delivery: Bundled by piece mark, protected at contact points, and loaded according to a loading plan. Delivery is normally 15 to 25 days after deposit and drawing confirmation.

Documentation Package: Piece mark list, packing list, Mill Test Certificate 3.1, welding procedure & welder certificate, galvanizing thickness report, and erection drawing.

🏢 About Our Company

Hangzhou FAMOUS Steel Engineering Co., Ltd. (FASECbuildings) is a steel structure group established in 2000, working as a manufacturer, fabricator, and exporter. With 1,200–1,300 employees and a fabrication capacity of about 8,000 metric tons per month, we deliver steelworks, facades, and building materials to projects in more than 60 countries across Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

We hold ISO 9001 and CE marked fabrication to EN 1090, and our welders are certified to EN ISO 9606. Design, welding, galvanizing, packing, and shipping are handled by one team, ensuring no gaps between suppliers and no waiting time between processes.

🌐 Website: www.structural-steelbuilding.com|https://www.famoussteel.com/

📩 Send Your Welded H Beam Drawings Today

Our engineers will confirm the section, the welding standard, and the delivery schedule, then return a competitive quotation