Shixinda's suppliers have specially produced this Cold Formed Channel Steel, also known as Cold-Rolled U-shaped Steel. It is formed by rolling steel strips at room temperature. The cross-section is in the shape of a groove "[". It belongs to cold-formed thin-walled steel and is different from hot-rolled channel steel produced through high-temperature rolling. It complies with the national standard GB/T 6728 for Cold-Rolled Steel Sections.
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Standard GB/T 6728 Equal Cold-Formed Channel Steel (U-channel) Specification Table |
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No. |
Size Model (H×B×t, mm) |
Section Height H (mm) |
Flange Width B (mm) |
Optional Standard Thickness (mm) |
Common Material |
Main Application Scenarios |
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1 |
40×20×t |
40 |
20 |
1.5/2.0/2.5 |
Q235B/Q355B |
Small storage racks, cable brackets, light keels |
|
2 |
50×30×t |
50 |
30 |
1.5/2.0/2.5/3.0 |
Q235B/Q355B/Galvanized |
Storage racks, keels, light equipment frames |
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3 |
60×30×t |
60 |
30 |
2.0/2.5/3.0 |
Q235B/Q355B |
Wall keels, support frames, light purlins |
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4 |
80×40×t |
80 |
40 |
2.0/2.5/3.0/4.0 |
Q235B/Q355B/Galvanized |
Factory purlins, photovoltaic brackets, medium-duty racks |
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5 |
100×50×t |
100 |
50 |
2.0/2.5/3.0/4.0/5.0 |
Q235B/Q355B/Galvanized |
Roof purlins, PV support columns, medium steel structures |
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6 |
120×50×t |
120 |
50 |
2.5/3.0/4.0/5.0/6.0 |
Q235B/Q355B |
Heavy purlins, equipment bases, steel structure frames |
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7 |
120×60×t |
120 |
60 |
2.5/3.0/4.0/5.0/6.0 |
Q235B/Q355B/Galvanized |
PV brackets, heavy purlins, mechanical equipment frames |
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8 |
140×60×t |
140 |
60 |
3.0/4.0/5.0/6.0 |
Q355B |
Large steel structures, PV support columns, heavy load brackets |
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9 |
160×60×t |
160 |
60 |
3.0/4.0/5.0/6.0/8.0 |
Q355B/Galvanized |
Factory beams & columns, large PV supports, heavy steel structures |
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10 |
180×70×t |
180 |
70 |
3.0/4.0/5.0/6.0/8.0 |
Q355B |
Heavy factory frames, equipment bases, bridge supports |
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11 |
200×70×t |
200 |
70 |
3.0/4.0/5.0/6.0/8.0/10.0 |
Q355B/Galvanized |
Large steel frameworks, heavy PV columns, infrastructure supports |
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Profile Type |
Main Application Scenarios |
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Thin-wall Mini U Channel (40×20 / 50×30) |
Keels, cable trays, small brackets, rack accessories |
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Standard Cold-Formed U Channel (80×40 ~ 120×60) |
Canopies, equipment bases, pipe support hangers |
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C Channel with Inner Lips |
Factory purlins, main beams of photovoltaic brackets |
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Thick-wall Cold-Formed U Channel (160×60 / 200×70) |
Heavy-duty attics, large PV support columns, heavy-load equipment frames |
- Cold forming process, higher section accuracy
- Clean surface finish, no need for secondary grinding
- Lightweight and high-strength structure, effectively reduces load and cost
- Good structural symmetry, stable and balanced force distribution
- Strong adaptability for deep processing, flexible customization
- Optional corrosion protection upgrade, excellent outdoor weather resistance
- Controllable national quality standards, strong engineering applicability
1.Selecting based on working conditions: Cold Formed Channel Steel is mainly used for lightweight, uniform load support, suitable for roof trusses, supports, ribs, and auxiliary load-bearing structures; for heavy-load impact, large-span high-pressure load core main beams, it is recommended to be combined with hot-rolled steel for use, to avoid long-term strong impact deformation.
2.Welding construction operation specifications: Cold-formed profiles have slight cold work residual stress, on-site welding should adopt segmented spot welding and low-temperature slow welding methods, avoiding continuous high-temperature concentrated welding, to prevent local stress concentration causing deformation and cracking. Perform rust prevention and paint repair treatment promptly after welding.
3.Uniform force distribution during installation: Ensure the flatness of the mating surface of the profile during installation, prohibit single-point suspension and forced twisting assembly, to avoid eccentric loading causing side bending or deformation of the profile, and ensure the long-term stability of the structure.
4.Using corrosion protection according to environmental classification: For indoor dry ordinary working conditions, black cold-formed channel steel can be selected; for outdoor open-air, coastal salt spray, and humid acidic alkaline environments, it is necessary to use hot-dip galvanized type, to delay zinc layer aging and rusting.
5.Preprocessing for deep processing in advance: For batch projects, it is recommended to pre-prepare holes and fixed-length cutting in the factory to reduce on-site secondary processing, reduce on-site processing errors and surface wear, and improve installation accuracy and construction efficiency.
6.Moisture-proof and protection during storage and stacking: The finished products should be raised off the ground, covered with rainproof film for stacking, to avoid long-term ground moisture and rain soaking, and prevent the surface of the profile from oxidizing and turning white, and the growth of rust.
7.Adhering to standard specifications for adaptation: Domestic and foreign construction strictly follow the requirements of GB/T 6728 national standards and European standards, for export projects, corresponding tolerances and wall thickness standards can be matched as needed to ensure the compliance of project acceptance.
A1: It is highly suitable. It has high precision, a smooth surface, is lightweight, and does not deform easily. It is the preferred material for interior light steel joists and wall supports.
A2: Cold-formed steel has more precise dimensions, a more attractive appearance, and is lighter in weight. It is suitable for lightweight and precise construction; hot-rolled steel is better suited for heavy-duty main structural load-bearing.
A3: The regular hot-dip galvanizing process has strong weather resistance. It can be used stably in regular outdoor environments for a long time and generally requires no frequent maintenance.
A4: Full-size customization, cut to length, precise drilling are supported. The finished components can be directly delivered, eliminating the need for on-site processing.
A5: The medium-thick wall specifications are fully compatible with photovoltaic purlins, support auxiliary load-bearing structures, and are currently the mainstream material for photovoltaic lightweight renovation.
A6: Each batch can provide material certificates and factory test documents. Third-party sampling re-inspection and export clearance are supported.
A7: Zero-cutting, mixed batch delivery, and urgent order delivery are supported. The inventory specifications are complete, and there is no high minimum order quantity limit.
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