Custom Prefabricated ASTM A588 Corten Steel Plate Truss Bridge with Trial Assembly

Product Overview

This custom prefabricated plate truss bridge is built to order for permanent and temporary crossings that demand a long service life with minimum maintenance. All main structural members are fabricated from ASTM A588 high-strength low-alloy weathering steel, a material that forms a stable oxide patina over time and eliminates the need for periodic repainting. Every bridge is trial-assembled in our workshop before shipment, so camber, splice fit and bolt-hole alignment are proven before the steel ever leaves the factory. Delivered as clearly tagged modular sections, the bridge is erected on site with bolted connections only — no site welding, no on-site drilling — typically reducing installation time by 60–70% compared with conventionally built bridges.

Key Specifications

• Steel grade: ASTM A588 Gr.A / Gr.B weathering steel (A572 Gr.50 and Q355NH available)
• Design load: AASHTO HS20-44 / HS25 / HL-93 or client-specified load class
• Connection: high-strength friction-grip bolted, ASTM A325 / A490
• Execution standard: AASHTO LRFD, AWS D1.5, EN 1090 up to EXC3
• Geometry: fully custom — span, deck width, truss depth and camber engineered to your drawings or site survey

Material Advantage — Why ASTM A588

• Weathering steel develops a dense, self-healing protective layer that slows further corrosion
• Corrosion resistance typically 2–8 times that of ordinary carbon structural steel
• Service life of 50 years and beyond in rural, urban and industrial atmospheres
• No painting cycle, therefore near-zero maintenance cost over the life of the bridge
• Bare, painted or galvanized finish selected according to the visual and environmental requirements of the project

Engineering & Custom Design

• In-house structural calculation and detailing from client drawings, site surveys or performance requirements
• Truss configuration adapted to span, clearance and aesthetics: Pratt, Warren, Baltimore or fully custom geometry
• Fatigue and deflection checks for highway, pedestrian and heavy-haul load classes
• 3D model and preliminary design submitted for approval before fabrication
• Third-party design verification and international code compliance available on request

Fabrication & Quality Control

• CNC cutting, automatic submerged-arc welding, straightening and shot blasting to Sa2.5
• Dimensional inspection at every stage; weld quality checked by UT and MT
• Traceable heat numbers and mill certificates for all main plates
• Full inspection report, as-built drawings and NDT records shipped with the goods

Trial Assembly — Proven Before Shipment

1. Shop trial assembly of the complete truss or matched segments on level beds
2. Verification of camber, overall geometry, splice fit and bolt-hole alignment
3. Matched marking of every member and connection with the erection sequence
4. Disassembly, protective packing and sequence-based loading
5. Erection manual supplied, remote video guidance available during installation

Surface & Finish Options

• Uncoated weathering steel: natural patina, lowest lifecycle cost
• Hot-dip galvanizing to ASTM A123 / ISO 1461 for aggressive environments
• Paint systems to ISO 12944 C3–C5, two-coat or three-coat epoxy / polyurethane
• Anti-slip deck treatment: grating, checker plate or sprayed aggregate

Deck & Accessory Options

• Steel plate deck, reinforced concrete deck, timber deck or open grating
• Guardrails, handrails, kerbs, expansion joints, drainage and lighting brackets
• Approach slabs and transition details coordinated with the client road design

Applications

Highway and rural road crossings, pedestrian and cycle bridges, temporary and emergency bridges, mining and industrial access bridges, agricultural and forestry access, park and landscape bridges, stream and river crossings, and replacement of deteriorated existing structures.

Delivery & Logistics

• Members bundled and steel-frame crated, connections tagged by assembly sequence
• Container or break-bulk loading plan prepared for the most economical freight
• Production lead time generally 30–45 days after drawing approval
• FOB, CIF, CFR and DAP terms available, export documentation handled in-house

Documentation & Compliance

Mill test certificates, welding procedure specifications and qualification records, dimensional inspection reports, trial assembly report, NDT reports, packing list, erection drawings and O&M manual are provided as a complete project package.

After-Sales Support

• Installation supervision or on-site technical guidance available
• Spare bolts, bearings and wearing parts supplied with the shipment
• Structural warranty per contract terms, technical response within 24 hours

How to Order

Send us your span, deck width, design load, site conditions and any reference drawings. Our engineering team returns a preliminary design, 3D sketch and quotation within 5 working days.

Contact us today with your bridge project requirements for a tailored, cost-effective prefabricated steel solution.