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ASTM A653 Hot-Dip Galvanized Steel C Structural Channel for Purlins and Framing
Product Overview
Royal Steel Group offers ASTM A653 hot-dip galvanized steel C channels for worldwide construction, industrial, agricultural, and solar applications. Manufactured by cold forming galvanised steel coils with high precision, c channel sections offer a high strength to weight ratio along with great corrosion protection.
These galvanized C structural channels are applied in roof purlins, wall girts, steel framing members, equipment supports, solar mounting systems and secondary structural members, in standard and customized sizes.
The products can be customized in thickness, length, hole patterns and galvanized coating thickness based on project drawings and structural specifications.
Product Detail
| Product Name | Hot-Dip Galvanized Steel C Structural Channel | Coating Options | G30, G40, G60, G90, Z275 and customized |
| Section Type | C Channel / C Purlin | Thickness | 1.5–5.0 mm |
| Manufacturing | Cold Formed / Roll Formed | Length | 6 m, 9 m, 12 m or customized |
| Base Material | Galvanized Carbon Steel / Structural Steel | Surface | Zinc Coated |
| Standard | ASTM A653/A653M | Holes | Plain / Pre-Punched / Slotted |
| Typical Grades | CS, SS / Structural Grades as specified | Processing | Cutting, Punching, Drilling, Custom Fabrication |
| Coating | Hot-Dip Galvanized | Inspection | MTC / SGS / Third-Party Inspection |
A36 Hot-Dip Galvanized Steel C Channel Chemical Composition & Mechanical Properties
Chemical Composition (ASTM A36 C Channel Steel)
| C | Mn | P | S | Cu | Fe |
| ≤0.26% | 0.80–1.20% | ≤0.040% | ≤0.050% | ≥0.20% (when specified) | Balance |
Mechanical Properties (ASTM A36 C Channel Steel)
| Yield Strength | Tensile Strength | Elongation (200mm) | Elongation (50mm) | Modulus of Elasticity | Density |
| ≥36 ksi (250 MPa) | 58–79 ksi (400–550 MPa) | ≥20% | ≥23% | 200 GPa | 7.85 g/cm³ |
A36 Hot-Dip Galvanized Steel C Channel Size
| No. | Size | Thickness | Type | Surface Treatment | ||
| mm | inch | mm | Gauge | |||
| A | 41x21 | 1-5/8x13/16" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
| B | 41x25 | 1-5/8x1" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
| C | 41x41 | 1-5/8x1-5/8" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
| D | 41x62 | 1-5/8x2-7/16" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
| E | 41x82 | 1-5/8x3-1/4" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
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Hot-Dip Galvanized Steel C Channel Manufacturing Process
1. Raw Material Selection
High-quality structural galvanized steel sheet is selected according to the required grade, thickness, coating designation, and mechanical properties.
2. Slitting
Steel coils are slit into suitable widths according to the required C channel dimensions.
3. Roll Forming
The strip passes through a series of forming rollers to gradually create the C-shaped cross-section while maintaining dimensional accuracy.
4. Punching and Cutting
Bolt holes, slots, service holes, and other openings can be punched according to drawings. The channel is then cut to the specified length.
5. Quality Inspection
Dimensions, thickness, straightness, surface condition, coating quality, and mechanical properties are checked according to the agreed specification.
6. Packing and Shipment
Finished C channels are bundled with steel straps and protected for international transportation.
Advantages of Hot-Dip Galvanized C Structural Channel
1.Durability for a Long Time
The zinc layer forms a protective film against humidity and atmospheric corrosion.
2.Reduced Maintenance Demand
For many typical outdoor environments, galvanized steel requires less surface maintenance than bare carbon steel.
3.Lightweight Structural Solution
Cold-formed C sections may be formed to produce an efficient structural profile while saving unnecessary steel.
4.Versatile Manufacturing
Various dimensions, lengths, holes, slots, lips and joints alternatives can be manufactured according to the project drawings.
5.Economical Building
Galvanized C channels are also ideal for budget-friendly building applications due to the low cost, ease of installation, and rust protection associated with them.
Application
Steel Structure Warehouses: Galvanized C channels are commonly used as roof purlins and wall girts in steel structure warehouses, providing support for roof and wall cladding systems.
Steel Structure Workshops: They can be used as secondary framing components in industrial workshops and manufacturing facilities.
Industrial Buildings: C structural channels provide lightweight and corrosion-resistant framing solutions for factories, plants, storage facilities, and equipment support structures.
Solar Mounting Structures: Galvanized C sections are suitable for photovoltaic mounting structures and solar support systems where long-term outdoor corrosion resistance is required.
Agricultural Buildings: Applications include agricultural warehouses, storage buildings, livestock buildings, and farm structures.
Equipment & Support Frames: C channels can also be fabricated into equipment supports, cable support systems, platforms, and other structural frames.
Why Choose Royal Steel Group
ASTM Standard Compliance – Our galvanized c channel steel are made in line with the agreed ASTM standards or customized.
Durable Corrosion Protection – Hot-dip galvanized surface solutions provide long-lasting zinc protection for building and outdoor structural uses.
Standard or Customized Size & Process – C channel is available in different dimensions with punching, cutting or other processing.
Rigorous Quality Control - We can make dimension, surface, coating and material inspection, MTC and 3rd party inspection are available.
Worldwide Export Experience – Royal Steel Group has clienteles worldwide, covering 160 countries and regions, help them in global steel procurement and logistics management since ever.
Competitive PriceDirect Supply – Royal Steel Group, your reliable steel producer and supplier from China, offers you competitive price, steady supply and professional export service.
One Stop Steel Service Provider - Besides galvanized c channel, Royal Steel Group also trades in a wide variety of galvanized and carbon steel profiles, applicable to building and industrial projects.
Packaging & Shipping
Royal Steel Group uses export-standard seaworthy packaging to protect galvanized C structural channels from deformation, moisture, scratches, and handling damage during long-distance transportation. Products are securely bundled with steel straps, with additional waterproof and protective materials available according to customer requirements.
Packaging
1.Strong steel strap bundling to prevent movement and deformation
2.Waterproof woven bags and moisture-proof paper for additional protection
3.Protective film available for galvanized surfaces when required
4.Specifications, quantity, weight, and shipping marks clearly labeled
5.Reinforced loading and fixing for container transportation
6.Customized export packing available for special projects
Shipping
We provide flexible international transportation solutions, including:
1.FCL Container
2.LCL Container
3.Bulk Vessel
4.Break Bulk
5.Sea Freight
6.Rail & Land Transportation
C structural channels can be securely loaded and fixed according to container dimensions and cargo weight to maximize loading efficiency. Royal Steel Group also provides complete export documentation and logistics coordination.
Delivery Time
Standard production and delivery are generally 7–15 days, depending on product specifications, order quantity, customization requirements, and destination.
Before shipment, Royal Steel Group performs a final inspection covering package condition, quantity, weight, labels, and overall cargo security to help ensure the products arrive safely at the destination.
FAQ
Q1: What is a galvanized C structural channel?
A: Galvanized C structural channel is a C-shaped cold-formed steel section protected by a zinc coating. It is commonly used for purlins, girts, framing systems, supports, and lightweight structural applications.
Q2: What ASTM standard is used for galvanized C channels?
ASTM A653/A653M covers hot-dip galvanized steel sheet used as the base material, while ASTM A1003/A1003M covers metallic-coated steel sheet used to manufacture cold-formed framing members such as purlins and girts.
Q3: What galvanized coating should I choose?
A: G60 and G90 are common coating designations for structural applications, but the appropriate coating should be selected according to the project environment, required service life, design specification, and applicable standards.
Q4: Can C channels be punched with holes?
A: Yes. C channels can be supplied with pre-punched holes, slots, or customized connection holes according to engineering drawings.
Q5: Can you manufacture customized C channels?
A: Yes. Width, height, thickness, lip size, length, hole pattern, steel grade, and galvanized coating can be customized according to customer drawings and project requirements.
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