UPN 120 channel: weight per metre and dimensions
UPN 120 weighs 13.4 kg per metre. A 6 m bar is 80.4 kg, a 12 m bar 160.8 kg, and a tonne is about 74.6 m of this section. Nominal values to DIN 1026-1: depth 120 mm, flange width 55 mm.
Another length or a whole order: the channel weight calculator opens with UPN 120 already selected.
UPN 120 dimensions
| Dimension | Symbol | Value |
|---|---|---|
| Depth | h | 120 mm |
| Flange width | b | 55 mm |
| Web thickness | tw | 7 mm |
| Flange thickness | tf | 9 mm |
| Root radius | r | 9 mm |
| Cross-section area | A | 17 cm² |
| Mass per metre | G | 13.4 kg/m |
A delivered bar may differ from these nominal values within the rolling tolerances of EN 10279; invoicing goes by the mill certificate, not by the table.
UPN 120 weight by length
| Length, m | Mass, kg |
|---|---|
| 1 | 13.4 |
| 2 | 26.8 |
| 3 | 40.2 |
| 4 | 53.6 |
| 5 | 67 |
| 6 | 80.4 |
| 8 | 107.2 |
| 10 | 134 |
| 12 | 160.8 |
Steel cost is mass times the price per kilogram: at a price C per kg a 12 m bar costs 160.8 × C and a 6 m bar 80.4 × C. Cutting, drilling and painting are priced separately; paint goes by surface area, not by weight.
UPN 120 section properties
| Property | Symbol | Value |
|---|---|---|
| Second moment of area, major axis | Iy | 364 cm⁴ |
| Elastic section modulus, major axis | Wel,y | 60.7 cm³ |
| Radius of gyration, major axis | iy | 4.63 cm |
| Second moment of area, minor axis | Iz | 43.2 cm⁴ |
| Elastic section modulus, minor axis, at the flange tip | Wel,z | 11.1 cm³ |
Iy governs deflection, Wel,y bending stress, iy the slenderness of a strut. Iy / Iz = 8.4: in vertical bending the section is 8.4 times stiffer than sideways. Source: ArcelorMittal catalogue “Sections and Merchant Bars” (2023), each value checked against a second, independent table. These are inputs for a check to EN 1993-1-1, not a load capacity.
UPN 120 next to neighbouring sizes
| Section | h, mm | b, mm | kg/m | Iy, cm⁴ |
|---|---|---|---|---|
| UPN 100 | 100 | 50 | 10.6 | 206 |
| UPN 120 | 120 | 55 | 13.4 | 364 |
| UPN 140 | 140 | 60 | 16 | 605 |
| IPE 120 | 120 | 64 | 10.4 | 317.7 |
| HEA 120 | 114 | 120 | 19.9 | 606.1 |
| HEB 120 | 120 | 120 | 26.7 | 864.3 |
Against UPN 120 at the same number: IPE 120 — mass ×0.8, Iy ×0.9; HEA 120 — mass ×1.5, Iy ×1.7; HEB 120 — mass ×2, Iy ×2.4. One size up, UPN 140 adds 19 % mass and 66 % Iy.
Other sizes
- IPE beams: IPE 100 · IPE 120 · IPE 140 · IPE 160 · IPE 180 · IPE 200 · IPE 220 · IPE 240 · IPE 270 · IPE 300
- HEA beams: HEA 100 · HEA 120 · HEA 140 · HEA 160 · HEA 180 · HEA 200 · HEA 220 · HEA 240 · HEA 260 · HEA 280 · HEA 300
- HEB beams: HEB 100 · HEB 120 · HEB 140 · HEB 160 · HEB 180 · HEB 200 · HEB 220 · HEB 240 · HEB 260 · HEB 280 · HEB 300
- UPN channels: UPN 100 · UPN 120 · UPN 140 · UPN 160 · UPN 180 · UPN 200 · UPN 220 · UPN 240 · UPN 260 · UPN 280 · UPN 300
Frequently asked questions
How much does a 6 m and a 12 m UPN 120 weigh?
UPN 120 weighs 13.4 kg/m, so a 6 m bar is 80.4 kg and a 12 m bar 160.8 kg. Ten 12 m bars come to 1608 kg.
Which is heavier: IPE 120, HEA 120, HEB 120 or UPN 120?
Per metre: HEB 120 — 26.7 kg/m (h 120 mm); HEA 120 — 19.9 kg/m (h 114 mm); UPN 120 — 13.4 kg/m (h 120 mm); IPE 120 — 10.4 kg/m (h 120 mm). UPN is a channel and is not symmetric about its web — a different member for different jobs, compared here by weight only.
What does 120 mean in UPN 120?
The nominal depth in millimetres: UPN 120 is 120 mm deep with a 55 mm flange. The letters give the series: UPN, a channel with tapered flanges.
How many metres of UPN 120 are in a tonne?
74.6 m: 1000 kg / 13.4 kg/m. That is about 12.4 bars of 6 m or 6.2 bars of 12 m.
Does S235 or S355 steel change the weight of UPN 120?
No. The table mass is the cross-section area times the density of steel, 7850 kg/m³: 17 cm² × 0.785 = 13.35 kg/m. The grade to EN 10025-2 sets strength, not density. A real bar differs from nominal only within the rolling tolerances of EN 10279.
Updated: