Precision Steel Arch Bridge Fabrication and Trial Assembly to AWS D1.5 and ASTM A709: custom fabrication of steel arch bridges with factory trial assembly — arch ribs, box beams and decking built to ASTM A709 and welded to AWS D1.5, ensuring dimensional accuracy, fit-up and smooth site erection.

• Precision Fabrication: Tight tolerances for camber, sweep and splices

• Trial Assembly: Factory pre-assembly to verify geometry and connections

• Welding Compliance: AWS D1.5 Bridge Welding Code

• Material Standard: ASTM A709 structural steel for bridges

• Certified Fabrication: AISC IBR/ABR bridge fabricator, AWS CWI inspection

For overseas bridge projects, steel components travel thousands of kilometres before they ever meet on site. If splices don’t line up or bolt holes don’t match, the fix happens on site — costly, slow and weather-dependent.

Factory trial assembly solves this before a single component leaves the plant. We fit the arch ribs, box beams and connections together on our shop floor, measure every gap, correct every mismatch — then mark, disassemble and ship.

Why Trial Assembly Matters

What We Fabricate

• Arch ribs — welded steel box sections with longitudinal stiffeners

• Box beams / girders — single-cell or multi-cell welded sections

• Bridge decking — orthotropic steel deck or composite with concrete slab

• Cross beams, hangers, bracing and base plates — welded or bolted connections

Built to Bridge Standards

• AWS D1.5 — Bridge Welding Code: WPS/PQR, certified welders, inspection

• ASTM A709 — Structural steel, Grade 50 / 50W / HPS 70W as specified

• AISC IBR/ABR — Certified Bridge Fabricator for major bridge work

• AWS CWI — inspection on all welding; AISC FCE fracture-control endorsement on request

How It Works

1. Drawings in — Shop drawings prepared with camber, sweep and splice details.

2. Fabrication — ASTM A709 steel cut, formed and welded to AWS D1.5.

3. Trial assembly on the shop floor — Segments fitted, measured and marked as they will go up on site.

4. Disassembled, packed, shipped — Every piece numbered for its erection sequence.

Documentation Included

Each shipment carries: Mill Test Reports, WPS/PQR, welder certificates, weld maps, NDT reports, trial assembly records, as-built shop drawings and packing list — ready for your project file.

Why Choose FASECbuilding?

At Hangzhou FAMOUS Steel Engineering Co., Ltd. (FASECbuilding), we bring over 20 years of experience in steel bridges and steel structures and exports to more than 100 countries and regions, specialising in steel bridges, factory buildings, trusses, composite floor decking and custom steel components. When you work with us, you get:

• AWS D1.5 & ASTM A709 compliant fabrication — documented and traceable

• AISC IBR/ABR certified factory with AWS CWI inspection

• Factory trial assembly — your bridge fits together before it ships

• OEM/ODM — built to your drawings, not from a catalog

• Export packing and worldwide shipping with full logistics support

Send us your drawings and required standard today for a free quotation and technical proposal — Hangzhou FAMOUS Steel Engineering Co., Ltd. (FASECbuilding) is ready to build your precision steel arch bridge, right the first time.