Modular Corten Steel Plate Truss Bridge – ASTM A588 Weathering Shop Built

Modular is a logistics decision, not just a design style.

Long truss bridges usually run into the same three constraints: how the span is transported, what the site crane can lift, and how much work has to happen at height. A one-piece truss solves none of them.

This bridge is divided into repeating plate truss modules that are shop-built to the same jig, shipped as standard modules inside containers, and bolted together on site in sequence. The span is extended by adding modules, so one design family covers a range of crossings, and a damaged or relocated module can be replaced without rebuilding the entire bridge.

MODULE CHAIN: From Standard Module to Finished Span

1. Module Definition
The truss is split into transportable modules with the same chord gauge and node pattern. Module length is set by container or truck limits, and the span is reached by module count plus end panels.

2. Shop Build to One Jig
Every module is assembled and welded in the same jig, so mating faces, bolt gauges, and camber match across the whole run. Interchangeability is designed in, not sorted on site.

3. Module Trial Fit
Modules are trial-fitted in pairs or in a full run before packing, confirming that the next module will bolt straight onto the previous one.

4. Container Packing
Modules, bracing, and splice plates are packed in the assembly sequence, with match marks that follow the erection order rather than the drawing order.

5. Progressive Site Assembly
Modules are lifted and bolted one after another, either on temporary supports or by cantilever from the abutment. Deck and railing follow behind the truss, so access is never blocked for long.

TECHNICAL DATA: Modular Structure Requirements

WHERE IT IS USED (Modular Applications)

• Long span pedestrian bridge

• River and canal crossing

• Site access and haul road bridge

• Temporary and emergency detour

• Mining and port conveyor walkway

• Relocatable industrial crossing

• Event and campus footbridge

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SCOPE OF SUPPLY: What Ships With the Modules

• ✓ Repeating truss modules and end panels with bearings

• ✓ Bracing sets, floor beams, and deck support members

• ✓ Jig-drilled splice plates and A325 / A490 bolt sets per joint

• ✓ Module schedule, erection drawings, and lifting point plan

• ✓ Mill test certificates, WPS, and NDT reports per module

• ✓ Packing list in erection sequence with match marks

YOUR DECISIONS: What Can Be Tailored

• Module Length: Set by container, truck, or crane limit. Shorter modules are easier to handle; longer modules reduce the number of site joints.

• Span Build-Up: Fixed span with end panels, or extendable span where additional modules can be added later on the same abutments.

• Deck and Access: Steel grating, timber, or composite deck, with optional maintenance walkway, kerb, and railing configuration.

• Finish Strategy: Bare weathering throughout, zoned galvanizing at bearings and splash areas, or a full coating system for a specified color.

BUYER QUESTIONS (FAQ)

Q: Can the bridge be extended later by adding modules?
A: Yes, if ordered as an extendable configuration. Abutments and bearings are sized for the future span, and the module type stays the same so new modules bolt onto the existing run.

Q: Can a damaged module be replaced on site?
A: That is the main advantage of interchangeability. The damaged module is unbolted and lifted out, and a replacement built to the same jig goes in without re-drilling adjacent modules.

Q: What crane capacity does site assembly need?
A: It depends on module length and truss depth, which are chosen partly to suit the crane available on site. Tell us the crane and access limits and the module split is adjusted to match.

Q: Is the bridge suitable for temporary or relocatable use?
A: Yes. Bolted modules can be dismantled, transported, and re-erected on new abutments, which is common for detour and construction access bridges.

Q: How is the bare finish protected during shipping?
A: Modules are packed on dunnage, separated at contact points, and protected from oil, mud, and salt spray. Contamination is the main risk to patina development, so packing and handling instructions are issued with the shipment.

ABOUT US

Hangzhou FAMOUS Steel Engineering Co., Ltd. (Est. 2002)
We have been designing and fabricating structural steel since 2002 from Hangzhou, China. Detailing, CNC cutting, jig assembly, welding, trial fitting, and inspection are handled in-house, so every module leaves the shop to the same gauge.

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

Trial orders are welcome. Contact us today with your span and module requirements.