When selecting structural steel for construction, fabrication, or industrial projects, understanding the dimensions and characteristics of standard steel shapes is essential. One commonly used profile is the C-channel, known for its strength, versatility, and ease of fabrication. Among the smaller structural channel sizes, the C3 × 4.1 hot-rolled steel channel is a popular choice for light to moderate load applications. This article provides a detailed overview of the C3 × 4.1 channel dimensions, material properties, and typical uses, while also highlighting the role of suppliers such as Bobco Metals.
What Does C3 × 4.1 Mean?
The designation C3 × 4.1 follows the standard American steel channel naming convention.
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The “C” indicates that the shape is a structural channel.
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The “3” represents the nominal depth of the channel in inches.
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The “4.1” indicates the weight of the channel in pounds per linear foot.
This means that a C3 × 4.1 channel is approximately 3 inches deep and weighs 4.1 pounds per foot of length. Understanding this designation helps engineers, fabricators, and buyers quickly identify whether a channel is suitable for their structural requirements.
Standard Dimensions of the C3 × 4.1 Channel
The C3 × 4.1 hot-rolled channel has standardized dimensions that ensure consistency across manufacturers and suppliers.
- Overall Depth
The nominal depth of the channel is 3.00 inches. This measurement represents the total vertical height of the section from the top of one flange to the bottom of the opposite flange. The depth plays a key role in determining the channel’s bending strength.
- Flange Width
Each flange has a width of approximately 1.41 inches. The flanges extend horizontally from the web and are critical in resisting bending forces. Wider flanges generally provide greater stability when the channel is used horizontally.
- Web Thickness
The web thickness is approximately 0.170 inches. The web is the vertical portion connecting the two flanges, and it primarily carries shear forces. A thicker web improves the channel’s resistance to deformation under load.
- Flange Thickness
The average flange thickness is approximately 0.273 inches, making it thicker than the web. This increased thickness allows the flanges to handle higher bending stresses, which typically occur at the outer edges of the section.
- Weight
As indicated in the designation, the C3 × 4.1 channel weighs 4.1 pounds per foot. This weight allows the channel to provide adequate strength while remaining light enough for easy handling and installation.
- Length
Standard stock lengths are commonly around 20 feet, though many suppliers, including Bobco Metals, offer cutting services to meet specific project requirements.
Material and Manufacturing Process
The C3 × 4.1 channel is typically produced from hot-rolled mild steel, commonly meeting A36 or equivalent structural steel standards. Hot rolling involves shaping steel at high temperatures, resulting in a durable product with excellent structural integrity.
Hot-rolled channels are known for:
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Good weldability
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High strength-to-weight ratio
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Cost-effectiveness
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Suitability for structural and industrial use
The surface finish of hot-rolled steel is generally rougher than cold-rolled steel, but this does not affect its performance in structural applications.
Common Applications of the C3 × 4.1 Channel
Due to its compact size and reliable strength, the C3 × 4.1 channel is widely used in a variety of applications, including:
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Light structural framing
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Equipment supports and machinery bases
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Trailer frames and vehicle components
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Racks, shelves, and support rails
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General fabrication and repair work
The channel shape allows for easy bolting and welding, making it ideal for custom steel projects where flexibility and efficiency are important.
Sourcing C3 × 4.1 Channels from Bobco Metals
Bobco Metals is a trusted supplier of hot-rolled steel products, including standard C-channels like the C3 × 4.1. Their inventory typically includes commonly used channel sizes, making it easier for contractors, fabricators, and manufacturers to obtain materials without long lead times.
Benefits of sourcing from Bobco Metals include:
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Consistent availability of standard channel sizes
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Accurate dimensional specifications
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Options for custom cutting and order quantities
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Support for both small and large projects
Having a reliable steel supplier ensures that material specifications match design requirements and that projects remain on schedule.
Summary of C3 × 4.1 Channel Dimensions
| Feature | Specification |
|---|---|
| Nominal Depth | 3.00 inches |
| Flange Width | 1.41 inches |
| Web Thickness | 0.170 inches |
| Flange Thickness (avg.) | 0.273 inches |
| Weight | 4.1 lb/ft |
| Material | Hot-rolled mild steel |
| Typical Length | 20 feet |
Final Thoughts
The C3 × 4.1 steel channel is a practical and versatile structural shape that meets the needs of many light to moderate load applications. Its standardized dimensions, manageable weight, and compatibility with common fabrication methods make it a reliable choice across multiple industries. By understanding its dimensions and material properties and sourcing from established suppliers such as Bobco Metals, builders and fabricators can ensure structural reliability and efficient project execution.