IPN 320 Steel I-Beam
IPN 320 Steel I-Beam: 320 mm deep and 131 mm wide, with a 11.5 mm web and 17.3 mm flanges, rolled to EN 10025 / EN 10365 in S235JR. It weighs 61 kg/m, so a 12 m length weighs about 732 kg.
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Applications & Usage
IPN beams have tapered inner flange faces and are specified where drawings call for them — crane runway and monorail beams, and repairs to older structures. Bolted flange connections need taper washers. Standard lengths: 12m.
Technical Specifications
| Specification | Value |
|---|---|
| Dimensions | IPN 320 |
| Depth h | 320 mm (12.6 in) |
| Flange width b | 131 mm (5.16 in) |
| Web thickness tw | 11.5 mm |
| Flange thickness tf | 17.3 mm |
| Root radius r | 11.5 mm |
| Toe radius r2 | 6.9 mm |
| Cross-sectional area A | 77.7 cm² |
| Weight per Meter | 61 kg/m (41 lb/ft) |
| Weight of a 12 m length | 732 kg |
| Material | Steel |
| Alloy/Grade | S235JR |
| Standard | EN 10025 / EN 10365 |
| Full Stock Length | 12 m |
Section properties
| Property | y-y | z-z |
|---|---|---|
| Second moment of area I (cm⁴) | 12510 | 555 |
| Elastic section modulus Wel (cm³) | 782 | 84.7 |
| Plastic section modulus Wpl (cm³) | 914 | 143 |
| Radius of gyration i (cm) | 12.7 | 2.67 |
IPN range: nominal dimensions in mm, mass in kg/m and major-axis (y-y) properties.
| Designation | h | b | tw | tf | kg/m | A (cm²) | Iy (cm⁴) | Wel,y (cm³) |
|---|---|---|---|---|---|---|---|---|
| IPN 80 | 80 | 42 | 3.9 | 5.9 | 5.9 | 7.58 | 77.8 | 19.5 |
| IPN 100 | 100 | 50 | 4.5 | 6.8 | 8.3 | 10.6 | 171 | 34.2 |
| IPN 120 | 120 | 58 | 5.1 | 7.7 | 11.1 | 14.2 | 328 | 54.7 |
| IPN 140 | 140 | 66 | 5.7 | 8.6 | 14.3 | 18.3 | 573 | 81.9 |
| IPN 160 | 160 | 74 | 6.3 | 9.5 | 17.9 | 22.8 | 935 | 117 |
| IPN 180 | 180 | 82 | 6.9 | 10.4 | 21.9 | 27.9 | 1450 | 161 |
| IPN 200 | 200 | 90 | 7.5 | 11.3 | 26.2 | 33.4 | 2140 | 214 |
| IPN 220 | 220 | 98 | 8.1 | 12.2 | 31.1 | 39.5 | 3060 | 278 |
| IPN 240 | 240 | 106 | 8.7 | 13.1 | 36.2 | 46.1 | 4250 | 354 |
| IPN 260 | 260 | 113 | 9.4 | 14.1 | 41.9 | 53.3 | 5740 | 442 |
| IPN 280 | 280 | 119 | 10.1 | 15.2 | 47.9 | 61 | 7590 | 542 |
| IPN 300 | 300 | 125 | 10.8 | 16.2 | 54.2 | 69 | 9800 | 653 |
| IPN 320 | 320 | 131 | 11.5 | 17.3 | 61 | 77.7 | 12510 | 782 |
| IPN 340 | 340 | 137 | 12.2 | 18.3 | 68 | 86.7 | 15700 | 923 |
| IPN 360 | 360 | 143 | 13 | 19.5 | 76.1 | 97 | 19610 | 1090 |
| IPN 380 | 380 | 149 | 13.7 | 20.5 | 84 | 107 | 24010 | 1260 |
| IPN 400 | 400 | 155 | 14.4 | 21.6 | 92.4 | 118 | 29210 | 1460 |
| IPN 450 | 450 | 170 | 16.2 | 24.3 | 115 | 147 | 45850 | 2040 |
| IPN 500 | 500 | 185 | 18 | 27 | 141 | 179 | 68740 | 2750 |
| IPN 550 | 550 | 200 | 19 | 30 | 166 | 212 | 99180 | 3610 |
| IPN 600 | 600 | 215 | 21.6 | 32.4 | 199 | 254 | 138800 | 4627 |
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Technical guides
Steel beam and channel sizes and weights: HEA, HEB, IPE, IPN, UPN and UPE tables (EN 10365)
Steel beam sizes in mm for European I-beams (IPE, IPN), H-beams (HEA, HEB) and UPN/UPE channels to EN 10365: dimensions, weight in kg/m, area, Iy and Wel,y.
Read the guide →H-beam vs I-beam: differences, designations and when to use each
How H-beams (HEA, HEB) and I-beams (IPE, IPN) differ in shape, weight and strength, how European, UK and US designations compare, and which to choose for beams and columns.
Read the guide →