Tianjin Brisk Metalwork Co., Ltd. is one of the leading manufacturers and suppliers of structural hollow section for bridges in China. We have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy bulk durable structural hollow section for bridges from our factory.
Product Overview
| Item | What We Supply |
|---|---|
| Section shapes | CHS, SHS, RHS |
| Production routes | Hot-finished (EN 10210 type), cold-formed welded (EN 10219 type) |
| Common grades | S355J0H, S355J2H, S355K2H, S460NH/NLH, ASTM A500 Gr.B/C |
| Surface | Black, shot-blasted, primed, painted, hot-dip galvanized |
| Lengths | 6 m and 12 m standard, cut-to-length on request |
| Processing | Saw cutting, bevelled ends, end plates, profile cutting for nodes |
| Documents | EN 10204 3.1 certificates, 3.2 with third-party witnessing on request |
Bridge structures we typically supply:
- Pedestrian and cycle footbridges (truss, arch and portal types)
- Highway overpass and utility pipe-rack bridges
- Truss bridge chords, diagonals and bracing
- Handrail, parapet and sign-gantry members
- Temporary and modular bridge systems
Which Route Fits Which Bridge Member?
| Bridge Member | Typical Choice | Why |
|---|---|---|
| Main truss chords (heavy wall, node zones) | Hot-finished CHS/SHS, S355K2H or S460NH | Uniform properties around the section, impact grade for cold climates |
| Diagonals and verticals | Cold-formed CHS or SHS | Tight dimensions, good economy at moderate wall |
| Footbridge arch or rafter members | Cold-formed or hot-finished CHS | Smooth profile, clean appearance |
| Handrail posts, parapet rails | Cold-formed SHS/RHS or CHS, galvanized | Light, uniform, durable finish |
| Pipe-rack / utility bridges | Cold-formed RHS/SHS | Cost-efficient, easy to bolt or weld |
How Do We Match the Impact Grade to Your Lowest Service Temperature?
Toughness is the property bridge reviewers check first. Steel that is fine at +20 degC can behave very differently on a winter night. The letters in the grade tell you the test temperature:
- J0H: impact tested at 0 degC
- J2H: impact tested at -20 degC
- K2H: a higher energy requirement at -20 degC
- NH/NLH: normalized steels for colder or heavier-wall applications
We confirm the impact grade against the lowest design service temperature and wall thickness stated in your specification, and the test result is reported per heat in the certificate, not copied from a typical value.
What Quality Checks Come With Bridge Members?
- Per-heat chemistry and mechanical results linked to every tube by heat number
- Impact test records at the specified temperature
- Wall thickness checks by ultrasonic measurement at the ends and along the length, so the wall at node zones is the wall you designed
- Weld seam NDT on welded sections
- Seam position control: on cold-formed sections we can keep the weld seam away from the node zone and the visible face when requested
- Third-party witnessed inspection (EN 10204 3.2) when your project or owner requires it, with the inspector welcome in our workshop
Why Does Durability Matter as Much as Strength?
Bridge members stay outdoors for a long time, so coating and interior protection decide maintenance cost.
- Hot-dip galvanizing for footbridges and handrails, with vent and drain details planned before dipping so zinc covers the inside and outside of the tube.
- Blast-cleaned and primed members for projects with a full paint system applied by the fabricator.
- Sealed ends: where your design calls for a closed-box member, we can supply plugged or capped tubes with guidance on end details, which keeps water from collecting inside.
- Smooth, continuous surface: a hollow section has fewer edges and crevices than a built-up open section, so coating is easier to apply and inspect.
Typical Applications
- Pedestrian and cycle truss footbridges
- Arch and portal-type footbridges
- Road overpass and highway truss members
- Utility, pipe-rack and conveyor bridges
- Railway platform and station bridges
- Handrails, parapets and sign gantries
- Temporary and modular bridge structures
Case: Two Footbridges, 64 Tubes, and the Inspector Who Caught the Wrong Impact Grade
A fabricator was building two pedestrian truss footbridges, each with a 38 m span, in a region where winter lows reach about -20 degC. The truss used 64 CHS tubes: 168.3x8 chords and 88.9x5 diagonals, about 31 tonnes in total.
The first lot had been bought as S355J0H, tested at 0 degC. When the independent inspector reviewed the certificates against the -20 degC design requirement, the whole lot was returned before fabrication began, and the project lost time.
The fabricator re-ordered from us as S355K2H with impact tests at -20 degC reported per heat, ultrasonic wall checks and a witnessed 3.2 inspection by the inspector's own representative. The documents were accepted at the first submission, and fabrication started on the planned date.
FAQ
Q: Can you supply bridge members with third-party inspection?
A: Yes. We arrange witnessed testing and EN 10204 3.2 certification with the inspection body you name.
Q: Do you profile-cut tube ends for truss nodes?
A: Yes, we can supply saw-cut, bevelled and profile-cut ends according to your node drawings.
Q: Can the hollow sections be galvanized after fabrication?
A: Yes, provided vent and drain holes are designed in. Send the drawings and we will mark the positions.
Q: Is a cold-formed section acceptable for a bridge?
A: For many members it is, depending on wall thickness, load type and your design code. Heavy-wall chords and fatigue-sensitive zones often favour hot-finished sections. Your bridge designer should make the final decision, and we will provide the product data.
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