Tapered Flange Channels - FAQs

Usually made from hot-rolled steel, a tapered flange channels are a common structural steel profile with a wide flat surface (web) and flanges at right angles to the web on either side of the web, forming a C-shape. The thickness of the flanges reduces from the web to the ends. The outer edges of tapered flange channels are sharply angled, while the inner surface has radius corners.

The flanges of a tapered flange channels taper in thickness from the web (the wide, flat part of the channel) to their ends, forming right angles on the outside and radius angles on the inside. The flanges of a parallel flange channel are the same thickness from the web to their ends, creating right angles on the outside and inside of the channel.

Tapered flange channels and I-beams are the two steel profile shapes with tapered flanges.

Tapered flange channels are used in a wide range of construction and other applications. They are commonly used for beams, columns, lightweight purlins, and other structural elements in multi-storey and industrial structures and bridges. They are also used in mining infrastructure, and in the manufacturing, transport, and storage industries.

Choosing the right TFC size depends on load requirements, span length, and application type. Refer to taper flange channel dimensions to ensure proper weight distribution. For load-bearing applications, consult structural engineers for the calculation of bending resistance. Match the flange thickness and web height to your specific framework needs.

The strength of a tapered flange channel depends on load orientation and application. TFCs provide superior load-bearing capacity when forces are applied vertically. Parallel flange channels may offer better load distribution for evenly distributed weights. The choice depends on structural design, with TFCs preferred for cost-efficient steelwork.

Yes, TFCs can be welded, bolted, or riveted, depending on the application and structural requirements. Welding is ideal for permanent connections in heavy-duty frameworks. Bolting provides flexibility for adjustments and maintenance in modular construction. Use pre-drilled connections for ease of assembly and accuracy in fabrication.

Tolerances for TFCs are set by steel manufacturing standards, ensuring uniformity and precision. Web thickness and flange tapers must meet load-bearing specifications. Length and straightness tolerances depend on fabrication standards (e.g., EN 10025 for structural steel). Engineers should refer to technical datasheets for exact measurements.

The gradual tapering of the flanges improves load distribution and material efficiency. Reduces unnecessary weight, making structures lighter without compromising strength. Minimises waste in steel fabrication, improving cost efficiency in construction. Enhances structural integrity by directing load forces efficiently through the web and flanges.