Hot-Dip Galvanized Steel Channel is a hot-rolled U-shaped steel section with a web and two flanges. The listed sizes include 6#, 8#, 10#, 12#, 14#a and 16#a, with Q235B and Q355B available. The channel is processed and then hot-dip galvanized for outdoor and corrosion-prone applications.
The open U-shaped section provides a practical connection surface for brackets, bolts, braces and equipment supports. The galvanized coating protects the steel surface from atmospheric corrosion.
| Channel Size | Web × Flange × Web Thickness (mm) | Theoretical Weight (kg/m) | Standard Length |
| 6# | 60 × 37 × 4.8 | 6.928 | 6 m / 9 m / 12 m |
| 8# | 80 × 43 × 5.0 | 8.045 | 6 m / 9 m / 12 m |
| 10# | 100 × 48 × 5.3 | 10.007 | 6 m / 9 m / 12 m |
| 12# | 120 × 53 × 5.5 | 12.059 | 6 m / 9 m / 12 m |
| 14#a | 140 × 58 × 6.0 | 14.535 | 6 m / 9 m / 12 m |
| 16#a | 160 × 63 × 6.5 | 17.241 | 6 m / 9 m / 12 m |
Other a/b channel sections can be supplied according to drawings and project requirements. Fixed-length cutting, punching, drilling, bending and other agreed processing are available.
Q235B is commonly used for support frames, equipment supports, warehouse structures, guardrails and general steel fabrication.
Q355B provides higher material strength and can be specified for heavier loads, larger spans and more demanding structural applications.
Material grade and channel size should be selected together with the span, load, support spacing and structural calculation.
| Requirement | Coating Thickness |
| Average zinc coating | ≥85 μm |
| Local minimum | ≥65 μm |
| Cut end | ≥45 μm |
| Heavy-corrosion option | ≥100 μm |
For coastal, chemical or other highly corrosive environments, a thicker zinc coating can be specified according to the project requirements.
For purchasing, the coating requirement should be stated together with the steel grade, channel size and length, for example: Q355B / 12# / hot-dip galvanized / average zinc ≥85 μm / 6 m.
The channel is produced first and galvanized after the required cutting and mechanical processing.
Hot-rolled channel steel → sizing and straightening → cutting / processing → degreasing → pickling → fluxing → drying → hot-dip galvanizing → cooling → passivation → zinc coating inspection → final inspection → packing.
The zinc bath is typically maintained at around 450°C. The zinc coating forms through the reaction between the prepared steel surface and molten zinc.
| Application | Typical Use |
| Steel buildings | Support frames, platforms and secondary structures |
| Curtain walls | Main and secondary support members |
| Solar power | Ground PV supports, bases and equipment frames |
| Municipal works | Guardrail bases, lamp supports and outdoor structures |
| Power and communications | Cable supports, brackets and equipment frames |
| Agriculture | Greenhouse frames and equipment supports |
| Industrial plants | Equipment racks, wastewater supports and outdoor structures |
| Warehouses | Structural frames, platforms and support systems |
Fixed-length cutting, punching and drilling can normally be completed before galvanizing so that the processed member receives zinc protection after fabrication.
If the galvanized channel is cut or drilled after delivery, the exposed steel should be cleaned and repaired with a suitable zinc-rich coating. Welding also removes zinc from the heated area and requires zinc-rich repair after welding.
Inspection can cover the following items:
Material certificates and galvanizing inspection records can be supplied for project orders. Third-party inspection can also be arranged when required.
Black channel steel has no zinc corrosion-protection layer and normally requires painting or another protective coating for outdoor use. Hot-dip galvanized channel steel receives its zinc coating during factory processing, eliminating the need for a separate full-surface painting process after delivery.
For dry indoor structures, black channel may be sufficient when permitted by the project specification. For outdoor or moisture-exposed structures, the required corrosion-protection system should be specified together with the structural section.
Custom orders can include fixed-length cutting, punching, drilling, bending, beveling, grinding and other processing according to drawings.
For export orders, channel steel can be bundled and reinforced for ocean transportation. Moisture-resistant protection can be used during shipment and storage to reduce handling damage and white-rust risk.
Rongheng supplies steel products from Tianjin Daqiuzhuang and can combine standard channel sizes with fixed-length cutting and project-specific fabrication.
Common listed sizes are 6#, 8#, 10#, 12#, 14#a and 16#a. Other a/b sections can be discussed according to drawings and requirements.
Standard lengths are 6 m, 9 m and 12 m. Fixed lengths can be supplied according to the order requirements.
Q235B is commonly used for conventional structural fabrication. Q355B has higher material strength and is used where the structural calculation requires a higher-strength grade.
The standard requirement can be specified as an average zinc coating of ≥85 μm, with local minimum ≥65 μm and cut-end coating ≥45 μm. Coatings of ≥100 μm can be specified for heavier corrosion exposure.
Yes. Fixed-length cutting, punching and drilling can be arranged before galvanizing according to drawings. Post-galvanizing cutting or welding requires zinc-rich repair on the affected area.
Yes. It is intended for applications where the steel is exposed to moisture or atmospheric corrosion. The zinc coating requirement should be selected according to the actual environment.
Yes. The listed applications include ground-mounted PV supports, bases and equipment frames. The channel size, steel grade and zinc coating should be specified according to the structural and environmental requirements of the project.
Material certificates, galvanizing inspection records and other agreed quality documents can be supplied. Third-party inspection can also be coordinated when required.
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Secondary Arterial Road No. 2-1, Expansion Area of Daqiuzhuang Industrial Zone, Jinghai District, Tianjin, China
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