IPN and UPN Sections
Classic I-shaped IPN and U-shaped UPN sections — versatile members for construction and machinery manufacturing.
IPN and UPN are classic structural sections produced to European standards, with tapered inner flange surfaces. IPN, with its I-shaped cross section, excels in beam applications, while UPN, with its U (channel) section, stands out in frames, chassis and side-wall applications. Both sections are fundamental building blocks of the manufacturing industry thanks to their weldability and wide availability. At Atakaş Demir Çelik we supply IPN sections from 80 to 400 and UPN sections from 65 to 400 in S235JR and S275JR grades from stock, with cutting to project requirements.
The tapered inner flange face of IPN and UPN is what makes these sections indispensable in classical fabrication, but it requires tapered washers in bolted connections. The UPN section is sensitive to torsion because its shear centre lies outside the web: for long-span beams, a double-channel solution (boxed back to back) should be preferred. In trailer chassis and tipper fabrication, the flat back face of UPN eases welding and assembly. We offer both series from stock with short lead times, in 6 or 12 metre lengths as requested and together with the project cutting list.
Because these two series cover a wide range of sizes, confirming stock before quotation clarifies the lead time. For sections not held in stock we present the procurement time and alternative section options within the same quotation. In fabrication dominated by welded connections, the squareness of cut faces directly affects labour, so we prefer saw cutting.
Applications
- Beam and purlin applications
- Machinery and equipment chassis
- Trailer and tipper manufacturing
- Mezzanine and platform structures
- Formwork and scaffolding systems
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| IPN Section Range | IPN 80 – IPN 400 |
|---|---|
| UPN Section Range | UPN 65 – UPN 400 |
| Grades | S235JR, S275JR |
| Weight per Metre | INP100: 8.34 kg/m … UNP300: 46.2 kg/m |
| Standard | DIN 1025-1 / EN 10365 (IPN), DIN 1026-1 (UPN) |
| Standards | DIN 1025-1 (IPN) · DIN 1026-1 (UPN) · EN 10025-2 · S235JR / S275JR |
| Delivery forms | IPN (I) · UPN (U) · 6 / 12 m length · Cut to size |
This sheet is for information only and is not a binding offer.
