China Factory Prefab Steel Arch Bridge Aashto Lrfd with Sea-Worthy Packing

• Customization: Available
• After-sales Service: 24/7 Online Technical Support
• Warranty: 1 Year
• Model NO.: Steel Arched Bridge
• Design Standard: Aashto Lrfd 20 (10th ED.)
• Welding Code: Aws D1.5 (2025)
• Steel Grade: ASTM A709 Gr.50 / Q355b
• Fabrication: Full Factory Prefab, CNC + Robotic Weld
• Preassembly: One-Side Full Assembly on Jigs
• Inspection: 100% Ut on Primary Welds
• Anti-Corrosion: HDG / Weathering Steel / Epoxy Paint
• Application: Multi-Lane Highway, Interchange, Overpass
• Transport Package: Seaworthy Packing
• Specification: High strength structural steel
• Trademark: FAMOUS
• Origin: China
• HS Code: 730890000
• Package Size: 1000.00cm * 200.00cm * 100.00cm
• Package Gross Weight: 50000.000kg
• Lead Time: 25 days (1 - 20 Tons) ; To be negotiated ( > 20 Tons)

Product Description

This China Factory Prefab Steel Arch Bridge is fully designed and fabricated to AASHTO LRFD 20 (10th Edition) and AWS D1.5 Bridge Welding Code (2025) , specially tailored for North American highway projects and global infrastructure contractors. Manufactured in our ISO-certified Hangzhou plant with over 20 years of heavy steel experience, the bridge features a closed-box arch rib structure that delivers outstanding torsion resistance and heavy-load capacity for multi-lane highways. Every order benefits from our in-house full preassembly and sea-worthy export packing – ensuring that your shipment arrives on-site intact, ready for fast bolted assembly, and free from corrosion or transit damage.

Specification

Parameter Category	Detailed Technical Data
Structural Configuration	Steel box arch ribs with lateral wind braces; orthotropic steel deck system (top plate, vertical webs, bottom flange, longitudinal stiffeners, transverse diaphragms); inward-inclined basket arch optional.
Span & Dimensional Range	Usable span: 30m – 200m; arch rise ratio adjustable 1:4~1:7; deck width: 6m – 24m (custom per lane count); single segment length: 2m – 12m for transport.
Material & Plate Thickness	ASTM A709 Grade 50 / Q355B structural steel; plate thickness 8mm – 50mm, graded by load demand; minimum 1/4 inch (6mm) for primary members.
Welding & NDT Requirements	100% UT (ultrasonic testing) on all primary load-carrying welds; full-penetration groove welds for splices; AWS D1.5 Clause 12 governs fracture-critical member fabrication; MT/PT on secondary welds.
Design Load & Performance	AASHTO LRFD limit states: Strength I, II, III, V; Fatigue I; Extreme Event I & II; HL-93 vehicle load (up to 600 kN); seismic categories I-IV; wind load resistance up to 1.5 kN/m².
Coating & Corrosion Protection	Multi-layer epoxy/polyurethane paint system (C3/C4 coastal grade); hot-dip galvanizing (ASTM A123) optional; weathering steel (Corten) available for unpainted service.

Factory Capability & Customization

Our large-scale workshop is equipped with CNC plasma cutters, automatic welding robots, large boring machines, and NDT inspection devices, enabling annual output of over 30,000 tons of steel bridges. We specialise in full-custom production: span length, arch curve, deck width, plate thickness, coating type, and even connection details can be tailored to your project specifications. We welcome bulk orders and provide volume discounts for large-scale highway programmes. With an in-house engineering team, we offer free structural calculation drawings and LRFD reports to support your tender or approval process.

Prefabrication & Preassembly Process

All components are 100% factory prefabricated – cutting, bending, welding, and drilling are completed under controlled indoor conditions, eliminating weather delays and ensuring precision. After individual fabrication, we perform a one-side complete preassembly of the entire arch rib on dedicated jigs, checking:

• Arch linearity and camber
• Bolt hole concentricity (tolerance ±0.3 mm)
• Segment matching gaps
• Overall span and width
• Fit-up of diaphragms and stiffeners
Preassembly records are signed off and included in the delivery documentation, giving you verified dimensional data before the bridge leaves our factory.

Quality Control & Certifications
 

Our quality system is built around AASHTO LRFD and AWS D1.5 requirements. We hold ISO 9001, EN1090, ISO3834, and AWS D1.1 certifications. Every steel coil comes with an ASTM A709 material test certificate, and we offer third-party inspection (e.g., SGS, BV) upon request. All welders are individually qualified per AWS D1.5, and all primary welds are 100% UT inspected – with full traceability from raw material to finished segment, ensuring smooth authority acceptance.

Packing & Delivery

Understanding the challenges of ocean transport, we provide professional sea-worthy packaging:

• Surface protection: Shop primer + anti-rust oil coating on machined surfaces.
• Edge protection: Collision-proof steel frames and rubber padding at corners.
 •Securing: Heavy-duty steel strapping and blocking to prevent shifting.
 •Container or break-bulk: Segments are sized to fit 20GP/40GP containers or arranged for bulk vessel loading – we supply a detailed loading layout drawing to maximise container utilisation and minimise freight costs.

All packing lists, bills of lading, and customs documents are provided for smooth clearance.

After Sales Service

We stand behind every bridge with a comprehensive after-sales package:

• On-site supervision: Experienced supervisors available for technical guidance during erection.
• Warranty: 1-year standard warranty against fabrication defects, extendable to 5 years.
• 24/7 engineering support: Rapid response via email/phone/video for any field issues.
• Spare parts: Stock of high-strength bolts, bearings, and coating kits – emergency parts air-shipped within 72 hours.
• Training: We provide on-site bolting, inspection, and maintenance training for your crew, plus a customised maintenance schedule to achieve the 75-100-year design life.

Company Profile

Hangzhou FAMOUS Steel Engineering Co., Ltd. is a leading heavy steel manufacturer with over 20 years of export experience. We have successfully delivered numerous AASHTO-standard steel bridges to North America, Australia, and the Middle East. Our integrated service covers structural design, detailing, full fabrication, preassembly, sea-worthy packing, and shipping – all from a single source, ensuring quality consistency, timely delivery, and competitive pricing for global contractors and wholesalers.