Structural steel channels are widely used across construction, fabrication, and industrial applications due to their strength, versatility, and ease of installation. One commonly specified size is the C3×4.1 steel channel. Whether you are an engineer, contractor, or fabricator, understanding the dimensions and characteristics of this channel section is essential for selecting the right material for your project.
This blog explains the C3×4.1 channel dimensions, their practical uses, and why sourcing them from a trusted supplier like Bobco Metal matters.
What Does C3×4.1 Mean?
The designation C3×4.1 follows the standard American naming convention for structural channels. The letter “C” indicates a channel shape with a vertical web and two horizontal flanges. The number “3” represents the nominal depth of the channel in inches, while “4.1” refers to the weight per foot in pounds.
This means a C3×4.1 channel is approximately 3 inches deep and weighs 4.1 pounds per linear foot, making it suitable for light to medium structural applications.
C3×4.1 Channel Dimensions
Understanding the physical dimensions of a C3×4.1 channel is important for accurate design, load calculations, and fabrication.
The overall depth, also known as the web height, is 3 inches. This vertical dimension plays a major role in the channel’s bending strength and load-bearing ability.
The flange width is approximately 1.41 inches. These flanges help stabilize the channel and provide a surface for bolting, welding, or connecting to other structural members.
The web thickness is about 0.17 inches, offering sufficient rigidity while keeping the overall weight manageable.
The flange thickness is typically around 0.27 inches, which improves durability and resistance to deformation under load.
C3×4.1 channels also include rounded fillets where the web meets the flanges. These fillets help reduce stress concentration, improve structural performance, and make welding easier.
Material Characteristics
C3×4.1 channels are usually manufactured from hot-rolled mild steel, commonly ASTM A36 or an equivalent grade. Hot rolling produces a strong, durable material with good ductility.
This type of steel offers excellent weldability and is easy to cut, drill, and fabricate. These qualities make C3×4.1 channels a reliable choice for general structural and fabrication work.
Common Applications of C3×4.1 Channels
Due to their size and strength-to-weight ratio, C3×4.1 channels are used in a wide range of applications. Common uses include light structural framing, equipment supports, bracing and reinforcement members, industrial racks and platforms, architectural features, utility structures, and custom fabrication projects.
They are especially useful in situations where space is limited or where heavier structural sections would be unnecessary and inefficient.
Why Dimensions Matter in Structural Design
Selecting the correct channel size is critical to ensuring safety, efficiency, and long-term performance.
The depth and thickness of the channel directly affect how much load it can safely support. A C3×4.1 channel performs well for secondary framing and lighter structural loads.
Flange width and thickness also influence structural stability and resistance to twisting, especially when the channel is used horizontally as a beam or support member.
Standardized dimensions improve fabrication efficiency by allowing predictable cutting, welding, and assembly, reducing errors and saving time on the job.
C3×4.1 Channels from Bobco Metal
Bobco Metal is a trusted supplier of hot-rolled steel products, including C3×4.1 structural channels. Their channels are produced to standard specifications, ensuring dimensional accuracy and consistent performance.
Bobco Metal provides high-quality mild steel channels suitable for structural, industrial, and fabrication use. Accurate sizing ensures compatibility with engineering designs, while ready availability in standard lengths helps reduce project delays. With industry experience and dependable service, Bobco Metal supports contractors, fabricators, and manufacturers with reliable steel solutions.
Tips for Selecting the Right Channel
Before choosing a C3×4.1 channel, it is important to evaluate load requirements to ensure the channel can handle expected stresses. Confirm the material grade for strength and weldability, and consider connection methods such as welding or bolting when reviewing flange and web thickness.
If the channel will be used outdoors or in harsh environments, corrosion protection such as coatings or galvanizing should also be considered.
Conclusion
The C3×4.1 steel channel is a versatile and efficient structural section with a 3-inch depth, approximately 1.41-inch flange width, and balanced thickness for strength and workability. It is well suited for light to medium structural applications where durability, ease of fabrication, and cost efficiency are important.
By sourcing C3×4.1 channels from Bobco Metal, you gain consistent quality, accurate dimensions, and dependable performance. Understanding these dimensions and applications allows engineers, contractors, and fabricators to design and build stronger, safer, and more efficient structures.