ASTM-Certified Q355B Steel Truss Structures for Heavy-Duty Factory Roofs and Warehouses

Steel trusses are the most efficient structural solution for heavy-duty factory roofs and warehouses. Unlike solid-web beams that rely on bending resistance, the triangular lattice configuration of a steel truss transfers loads through axial forces – members experience only tension or compression. This fundamental difference delivers remarkable advantages: significantly less steel for the same span and load, lighter structural weight reducing foundation costs, and the ability to achieve column-free spans of 30–60 metres or more. For warehouses requiring uninterrupted floor space for high-bay racking and production lines, or factories housing heavy equipment and conveyors, steel trusses offer the optimal balance of strength, economy, and design flexibility.

Why Q355B? – The Smart Material Choice for Industrial Projects

Q355B delivers 355 MPa minimum yield strength – approximately 51% higher than Q235B and 38% higher than ASTM A36 – enabling lighter sections and reduced steel tonnage. With CEV ≤0.45%, it offers excellent weldability without preheating for most thicknesses, and 34J impact toughness ensures reliable cold-climate performance.

Global Equivalents: Q355B is fully interchangeable with ASTM A572 Grade 50 (USA), S355JR (Europe), and JIS SM490A (Japan). Full Mill Test Certificates with heat number traceability are provided.

Designed for Real-World Industrial Demands

     • Column-Free Interiors – maximises floor space for high-bay racking, AGV pathways, and production lines.

     • Heavy Load Capacity – engineered for roof insulation, fire sprinklers, HVAC, exhaust systems, and maintenance loads.

     • Crane Integration – provisions for overhead bridge cranes (5–20 ton) with runway beam support.

     • Seismic Resilience – AISC 341 compliant detailing available for seismic zones.

• Future Expansion – designed with connection points for building extensions.

Custom-Engineered to Your Project

What We Customise:

• • Span, roof slope, column spacing

• • Dead, live, snow, wind, and seismic loads

• • H-beams, channels, angles, or tubes

• • Bolted or shop-welded connections

• • Primer, paint, or hot-dip galvanized finish

• • AISC 360, Eurocode 3, or GB 50017 compliance

Engineering Deliverables: 3D models (Tekla Structures / STAAD Pro), detailed shop drawings, erection plans, connection details, and lifting plans.

Fabrication Excellence

• CNC Cutting & Drilling – exact lengths and hole positions to AISC tolerances (±1.5mm).

• Jig-Set Assembly – consistent geometry across all trusses.

• Certified Welding – EN ISO 9606-1 certified welders with approved WPS (SMAW/GMAW/SAW).

• Inspection & Testing – dimensional verification, visual weld inspection, NDT (UT/MT) on critical joints, and coating thickness checks.

• Trial Assembly – 1:1 scale verification for complex projects before disassembly and packing.

Quality Assurance

• • Full material traceability – heat numbers linked to Mill Test Certificates

• • Certified welders and procedures – WPS/PQR documentation available

• • In-process inspection – checks at every fabrication stage

• • Third-party inspection welcome – SGS, BV, TÜV, or your specified inspector

Complete documentation provided with every shipment: MTCs, WPS/PQR, NDT reports, dimensional records, and as-built drawings.

Specifications (Customisable)