Prefabricated Modular Steel Structure Bridge Heavy-Duty Fabricated Steel Bridge Components

Superior Load-Bearing & Anti-Fatigue Performance
We adopt high-strength low-alloy structural steel as raw material. The integrated frame composed of main girders, cross beams and triangular bracing systems features ultra-high rigidity and stable bearing capacity. It can withstand long-term repeated heavy vehicle rolling, and effectively resist structural fatigue crack, perfectly fitting long-term traffic operation of highway and municipal bridges.
Ultra-Fast Factory Prefabrication & On-Site Assembly
All core bridge components including welded main beams, supporting frames and connecting fittings are fully machined in our workshop, covering cutting, precision welding, hole drilling and dimension calibration. Only high-strength bolt splicing work is needed on site, eliminating complicated on-site pouring and field welding. After receiving advance payment and confirmed construction drawings, we can deliver the first batch of finished steel parts within 60–70 days, cutting field construction duration by more than half compared with traditional concrete bridges.
Strong Seismic & Weather Adaptability
Optimized structural force transfer design greatly improves seismic resistance level, which can cope with geological displacement and vibration risks in mountainous, seismic-prone areas. The overall steel structure has outstanding adaptability to temperature difference, frost, rain and strong wind, and will not crack or deform easily under extreme natural conditions.
Fully Customized Structural Scheme for All Scenarios
We tailor-make the whole bridge system according to your engineering parameters. Adjustable span, deck width, vehicle load grade, structural type (truss bridge, plate girder bridge, pedestrian overpass, temporary transport bridge). The layout of guardrail, expansion joint and bearing support can be revised to match local mainstream standards including AS/NZS, Eurocode and national GB specifications.
Significantly Reduced Total Project Investment
Light self-weight of steel frame largely lowers the construction cost of foundation works. Centralized factory processing reduces site labor, machinery and time cost. Our quotation remains valid for 5 working days; we will adjust unit price and container loading quantity based on final construction drawings to control your overall project budget reasonably.
Recyclable & Low Carbon Green Infrastructure
All steel components can be completely recycled after the bridge service life expires, producing far less construction waste during installation and demolition. The whole manufacturing process follows international environmental protection requirements, fully meeting the green engineering assessment standards of global infrastructure bidding projects.
One-Stop Full Technical Support
We provide complete official documents including material test certificates, welding non-destructive testing reports and professional installation manuals. Our senior structural engineers offer free drawing review, load calculation and scheme optimization before order placement. We can also dispatch technical staff to overseas construction sites to guide assembly on demand.

Product Details

1. Product Overview

Prefabricated modular steel structure bridge is a mature heavy-load infrastructure solution, independently assembled from factory prefabricated steel members. The main system consists of welded H-shaped steel main girders, channel steel cross beams, angle steel stable bracings, square & rectangular tube guardrail frames, round steel connecting pieces and complete sets of matched bolt fittings. All parts are precisely manufactured in advance and shipped in bulk to the construction site, then spliced into a complete bridge via high-strength bolts without cast-in-place concrete. This type of steel bridge is widely applied to municipal overpasses, river-crossing highway passages, scenic sightseeing bridges, mine temporary transport bridges and engineering temporary access bridges around the world.

2. Raw Material & Production Standard

Core Raw Material Grade: Q355B high-strength structural steel; Q355NL low-temperature impact-resistant steel for cold high-latitude regions, with stable yield strength and tensile performance to meet heavy traffic load requirements.
Main Structural Components: Welded H-beam main girders, standard H-beam load-bearing members, angle steel diagonal bracings, channel steel cross beams, round pipe auxiliary supports, square & rectangular hollow section guardrail frames, round steel connecting parts and all loose installation accessories.
Precision Production Process: Numerical control cutting, automatic submerged arc welding, precision CNC drilling, overall dimension calibration and flaw detection inspection, to guarantee consistent dimensional accuracy and welding quality of every component.

3. Production & Delivery Cycle

The total manufacturing cycle ranges from 60 to 90 working days, counting from the date we receive your advance payment and fully confirmed construction drawings. The first batch of finished bridge steel components will be ready for shipment within 60–70 days. All structural parts are wrapped with protective cushioning and fixed with dedicated steel supports inside containers, to prevent collision deformation and surface scratch during long-distance ocean and inland transit. We can lock sea and inland transportation freight rates in advance to avoid cost fluctuations caused by rising logistics prices.

4. Diversified Application Scenarios

Municipal Traffic Engineering: Urban pedestrian overpasses, urban river-crossing vehicle bridges, viaduct auxiliary connecting passages
Highway & Rural Infrastructure: Small-span rural road bridges, heavy truck crossing passages, mountain traffic connecting bridges
Tourism & Landscape Construction: Scenic spot sightseeing bridges, waterfront pedestrian landscape bridges, marina connecting passages
Industrial & Emergency Projects: Mining heavy transport temporary bridges, construction site temporary access bridges, disaster relief rapid assembly emergency bridges

5. Design & Fabrication Code Compliance

Our structural design strictly complies with a full set of international mainstream bridge engineering codes: Chinese national GB bridge specifications, Australian AS/NZS highway design standards, European Eurocode steel structure standards. We accept custom design standards submitted by customers to produce components that fully match local inspection and acceptance rules. Every finished steel member will pass multi-link inspection before delivery, with complete test documents provided together with goods.

6. Shipment & Commercial Terms Regulation

Bill of Lading Rule: If you do not specify the delivery form of bill of lading, telex release will be arranged by default. If the consignee information on the bill of lading contains "TO ORDER", only original paper bill of lading can be issued.
Container VGM Requirement: VGM data must be submitted to the terminal before containers return to the yard; failure to submit VGM on schedule will affect container stacking and ship loading schedule.
Order Policy: Once the formal production order is issued, cancellation will not be accepted. Raw materials will be cut and processed immediately after order confirmation based on confirmed drawings.

7. After-Sales Service Commitment

Free structural scheme optimization and load-bearing parameter calculation before order confirmation
Complete export document package: commercial invoice, packing list, material inspection report, welding flaw detection certificate
Online remote technical guidance for whole installation process; overseas on-site engineer support available upon request
Long-term supply of spare connecting steel fittings for later maintenance and replacement after project completion
24-hour quick response for all commercial and technical consultation requests during cooperation