Precision Prefabricated Weathering Steel Bridge - ASTM A588 Corten Truss Structure

A prefabricated bridge only saves money if the parts arrive ready to assemble. When plate edges are hand-cut, holes are match-drilled on site, and camber is pulled in with jacks, the savings disappear into crane time and rework.

We build it the other way round.
What arrives on site is not a random kit of steel—it is a structure that has already been put together once in our factory. Every plate is CNC cut, every node is jig-assembled, and the full span is trial-assembled before it’s packed.

The Result: Zero drilling. Zero cutting. Zero field fit-up surprises.

THE SCORECARD: Precision by the Numbers

Why our tolerance holds when others fail:

• 100% Factory Trial Assembly

• 0 Site Reaming or Flame Cutting Required

• AWS D1.5 Certified Full-Penetration Welding

• ASTM A588 Bare Weathering (No Paint Schedule)

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ANATOMY OF PRECISION: The 6-Stage Controlled Chain

Instead of just giving you a spec sheet, here is exactly how we guarantee your bridge bolts together on the first lift:

Stage 1: Detailing & Nesting
Member sizes, camber, and bolt gauges are resolved in the shop 3D model first. Plates are nested for grain direction and minimum waste, with every part match-marked from day one.

Stage 2: CNC Cutting & Edge Prep
Plate is plasma or laser-cut to profile, with edges prepared for full-penetration welds. Cut quality is verified before assembly—so on-site fit-up never depends on a grinder.

Stage 3: Jig Assembly & Welding
Chords, webs, and gussets are set in fixed jigs to lock in squareness and camber. Welding follows qualified WPS to AWS D1.5, with a sequence controlled to eliminate distortion.

Stage 4: Jig Drilling of Connections
Splice and node plates are clamped and drilled together. Hole patterns are physically transferred from the jig, not re-measured.

Stage 5: Full Span Trial Assembly
The complete truss is assembled in the yard with temporary bolts to verify hole alignment, camber, bearing seats, and railing interfaces. Any deviation is corrected here, not on your site.

Stage 6: Marking & Sequential Packing
Members are match-marked, bare weathering surfaces are protected from transit contamination, and bundles are packed in the exact sequence your site will erect them.

THE METALLURGY: Why ASTM A588?

• Self-Healing Patina: The copper, chromium, and nickel alloy balance generates a dense, adherent oxide layer under alternating wet and dry exposure.

• Zero Paint Schedule: No scaffolding, no repainting shutdowns, no maintenance access issues.

• Smart Corrosion Zoning: The ventilated truss stays bare, while bearings, splash zones, and buried steel are hot-dip galvanized or coated. Supplied with Mill Test Certificates per heat.

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THE CONFIGURATOR: Decisions You Control

We don't sell off-the-shelf. Tailor your structure to the exact site conditions:

THE HANDOVER PACKAGE: Unboxing Your Bridge

When the containers arrive, you have everything needed to close the site:

• ✅ Match-marked truss segments, floor beams, and bracing.

• ✅ Jig-drilled splice and node plates (packed per connection).

• ✅ A325 / A490 bolt sets, nuts, washers, and bearing assemblies.

• ✅ Erection drawings, bolt schedule, and lifting point plan.

• ✅ Mill test certificates, WPS & welder certs, NDT reports.

• ✅ Trial assembly dimensional report and sequential packing list.

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FIELD NOTES: Buyer FAQ

Q: Can we skip the trial assembly to save cost?
A: It can be offered, but it transfers geometry risk to your site. For first articles and spans that interface with existing abutments, we strongly recommend keeping it.

Q: What if a bolt hole doesn't line up on site?
A: It shouldn't happen because of the jig-drilling and trial assembly. But if an issue occurs, the match marks and drawings allow us to identify the exact member and ship a replacement immediately.

Q: How is camber verified?
A: Camber is set in the jig, checked at trial assembly, and recorded in the dimensional report. It's measured relative to the chord ends so your team can verify it before lifting.

THE FACTORY FLOOR: About Us

Hangzhou FAMOUS Steel Engineering Co., Ltd. (Est. 2002)
Detailing, CNC cutting, jig assembly, welding, trial assembly, and inspection are all handled in-house. We don't outsource your precision. Tolerance is controlled by one team from drawing to shipment.

🌐 Websites: www.famoussteel.com | www.steelfabricat.com | www.structural-steelbuilding.com

Ready to eliminate on-site rework?
Send us your span, load requirements, and site survey data. We will provide a tailored structural package and a competitive quotation.

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