UPN is a European rolled U-channel (structural channel) with a vertical web and two parallel flanges. Designation UPN = U-Profil Normal.
| Profile | hmm▲ | bmm▲ | twmm▲ | tfmm▲ | Acm2▲ | Iycm4▲ | Izcm4▲ | Wycm3▲ | Wzcm3▲ | Gkg/m▲ | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| UPN 50 | 50 | 38 | 5 | 7 | 7.12 | 26.4 | 9.12 | 10.6 | 3.75 | 5.6 | |
| UPN 65 | 65 | 42 | 5.5 | 7.5 | 9.03 | 57.5 | 14.1 | 17.7 | 5.07 | 7.1 | |
| UPN 80 | 80 | 45 | 6 | 8 | 11 | 106 | 19.4 | 26.5 | 6.36 | 8.6 | |
| UPN 100 | 100 | 50 | 6 | 8.5 | 13.5 | 206 | 29.3 | 41.2 | 8.49 | 10.6 | |
| UPN 120 | 120 | 55 | 7 | 9 | 17 | 364 | 43.2 | 60.7 | 11.1 | 13.4 | |
| UPN 140 | 140 | 60 | 7 | 10 | 20.4 | 605 | 62.7 | 86.4 | 14.8 | 16 | |
| UPN 160 | 160 | 65 | 7.5 | 10.5 | 24 | 925 | 85.3 | 116 | 18.3 | 18.8 | |
| UPN 180 | 180 | 70 | 8 | 11 | 28 | 1 350 | 114 | 150 | 22.4 | 22 | |
| UPN 200 | 200 | 75 | 8.5 | 11.5 | 32.2 | 1 910 | 148 | 191 | 27 | 25.3 | |
| UPN 220 | 220 | 80 | 9 | 12.5 | 37.4 | 2 690 | 197 | 245 | 33.6 | 29.4 | |
| UPN 240 | 240 | 85 | 9.5 | 13 | 42.3 | 3 600 | 248 | 300 | 39.6 | 33.2 | |
| UPN 260 | 260 | 90 | 10 | 14 | 48.3 | 4 820 | 317 | 371 | 47.7 | 37.9 | |
| UPN 280 | 280 | 95 | 10 | 15 | 53.3 | 6 280 | 399 | 448 | 57.2 | 41.8 | |
| UPN 300 | 300 | 100 | 10 | 16 | 58.8 | 8 030 | 495 | 535 | 67.8 | 46.2 | |
| UPN 320 | 320 | 100 | 14 | 17.5 | 75.8 | 10 870 | 597 | 679 | 80.6 | 59.5 | |
| UPN 350 | 350 | 100 | 14 | 16 | 77.3 | 12 840 | 570 | 734 | 75 | 60.6 | |
| UPN 380 | 380 | 102 | 13.5 | 16 | 80.4 | 15 760 | 615 | 829 | 78.7 | 63.1 | |
| UPN 400 | 400 | 110 | 14 | 18 | 91.5 | 20 350 | 846 | 1 020 | 102 | 71.8 |
UPN is a European rolled U-channel (structural channel) with a vertical web and two parallel flanges. Designation UPN = U-Profil Normal. Defined by EN 10365.
The section has one axis of symmetry (parallel to the flanges). The centroid lies inside the section, shifted from the web toward the open side of the U. UPN is used for frames, ladders, roof trusses, vehicle side rails, and structures where the flat web face is advantageous (easy bolted connections). Because of asymmetry, the centroid position (ey) and the fact that the shear centre lies outside the section matter for design: eccentric loads cause torsion. UPN has much lower torsional stiffness than closed sections.