Bridge steel beams description
Bridge steel beams, also known as bridge steel girders, are used in bridge structures, serving as the main load-bearing components to distribute the upper loads.
Bridge steel beams are fabricated from high-strength steel grades (e.g., ASTM A572, ASTM A709, S460, S690, Q345q, Q420q). Their exceptional strength and tensile properties make them ideal for constructing various types of bridges, including long-span, highway, railroad, and pedestrian bridges.
The unmatched benefits of steel beams in bridge structures
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Due to exceptional strength and stability, steel beams provide a safe and robust foundation for bridges.
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With proper surface treatment (such as HDG), bridge steel beams have superior durability and a long life span.
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The use of steel beams offers flexibility and freedom in bridge construction, enabling innovative designs and efficient prefabrication.
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Steel's inherent ductility helps steel bridges absorb and disperse extreme forces (e.g., strong winds and seismic events).

Leading End-to-End bridge steel beam manufacturing
We provide a comprehensive range of precision-engineered bridge steel beam solutions, fabricated to meet the exacting demands of modern infrastructure projects.




Various bridge steel beam options:
- Welded wide flange H-beams
- Rolled steel beams for bridges
- steel box girders
- Steel truss for bridges
Every steel beam for a bridge is designed and fabricated to rigorously adhere to AISC and ASTM standards.
The quality of prefabricated bridge steel beams is guaranteed through independent third-party inspections from globally recognized bodies like TUV, ABS, and BV.
Conclusion
From sourcing materials to the precise fabrication and rigorous quality inspection of bridge steel beams, SYNERGIA offers comprehensive, seamless support. We collaborate closely with you to turn your vision into a completed project.
FAQ
What is the steel cross beam on a bridge called?
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The steel cross beam on a bridge is called a girder. Bridge steel girder are the primary support member of a steel bridge to transfer heavy loads to the foundation.
What are strong steel beams supporting bridges?
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Strong steel beams supporting bridges are structural members designed to carry heavy loads and withstand various forces such as bending, shear, and vibration. Typically, I-beams, welded H-beams, box girders, or truss bridge form the primary load-carrying framework.
What type of steel is best for bridges?
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Bridge steel beams are commonly made from high-strength low-alloy steel (such as ASTM A572, S460, Q460B, etc.)and strctural steel for bridges (ASTM A709, S460Q, Q345q, etc).
| Design | TEKLA / BIM / CAD | ||
| Thickness | 8-100mm or customized | ||
| Width | 1600-3200mm or customized | ||
| Length | 8000-16000mm or customized | ||
| Standards | GB | ASTM | EN |
| Materials | Q355q C/D/E Q370q C/D/E Q420q D/E/F Q460q D/E/F Q500q D/E/F Q550q D/E/F Q620q D/E/F Q690q D/E/F Q355qNH D/E/F Q370qNH D/E/F Q420qNH D/E/F Q460qNH D/E/F Q500qNH D/E/F Q550qNH D/E/F |
A709 50[345] 50W[345W] HPS 50W[HPS345W] HPS 70W[HPS 485W] HPS 100W[HPS 690W] |
S355N/NL/M/ML S420N/NL/M/ML S460N/NL/M/ML S460Q/QL/QL1 S500Q/QL/QL1 S550Q/QL/QL1 S620Q/QL/QL1 S690Q/QL/QL1 |
| Surface Treatment | Sand(Shot) Blasting / Acid Washing | ||
| Coating | HDG Painting (INTERNATIONAL / JOTUN / HEMPEL) |
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| Fasteners for Bridge | Heavy Hex Bolts Sockey Head Cap Screws U Bolts Eyebolts Threaded Rods Welding Studs Anchor Bolts |
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| Bolts standards | GB | ASTM | EN |
| GB/T 1228 GB/T 1231 GB/T 43151 |
ASTM A325(M) ASTM A490(M) ASTM A354 ASTM A574 ASTM F3125 ASTM F1554 |
EN 14399-3 EN 14399-4 DIN6914 DIN6915 DIN931 DIN933 |
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