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Rolled Metal Handbook: Sections, Mass of 1 m, Metres per Tonne
I-beam Sections: Mass of 1 m, Dimensions and Section Properties
The tables list I-beams No. 10–60 with sloped inner flange faces: height, flange width, web and flange thickness and the mass of 1 m. For sizes No. 14–45 and the M-series beams they add the section area, the moments of inertia and resistance, the radii of gyration and the hole positions.
Contents
I-beams No. 10–60: dimensions and mass of 1 m
The beam number equals its height in centimetres. The letter “a” in the number marks a profile of the same height with a wider flange.
Hot-rolled steel I-beams with sloped inner flange faces · ГОСТ 8239-89
| Section | h, mm | b, mm | s, mm | t, mm | Mass of 1 m, kg | Metres per tonne |
|---|---|---|---|---|---|---|
| 10 | 100 | 55 | 4.5 | 7.2 | 9.46 | 106 |
| 12 | 120 | 64 | 4.8 | 7.3 | 11.5 | 87 |
| 14 | 140 | 73 | 4.9 | 7.5 | 13.7 | 73 |
| 16 | 160 | 81 | 5 | 7.8 | 15.9 | 62.9 |
| 18 | 180 | 90 | 5.1 | 8.1 | 18.4 | 54.3 |
| 18a | 180 | 100 | 5.1 | 8.3 | 19.9 | 50.3 |
| 20 | 200 | 100 | 5.2 | 8.4 | 21 | 47.6 |
| 20a | 200 | 110 | 5.2 | 8.6 | 22.7 | 44.1 |
| 22 | 220 | 110 | 5.4 | 8.7 | 24 | 41.7 |
| 22a | 220 | 120 | 5.4 | 8.9 | 25.8 | 38.8 |
| 24 | 240 | 115 | 5.6 | 9.5 | 27.3 | 36.6 |
| 24a | 240 | 125 | 5.6 | 9.8 | 29.4 | 34 |
| 27 | 270 | 125 | 6 | 9.8 | 31.5 | 31.7 |
| 27a | 270 | 135 | 6 | 10.2 | 33.9 | 29.5 |
| 30 | 300 | 135 | 6.5 | 10.2 | 36.5 | 27.4 |
| 30a | 300 | 145 | 6.5 | 10.7 | 39.2 | 25.5 |
| 33 | 330 | 140 | 7 | 11.2 | 42.2 | 23.7 |
| 36 | 360 | 145 | 7.5 | 12.3 | 48.6 | 20.6 |
| 40 | 400 | 155 | 8.3 | 13 | 57 | 17.5 |
| 45 | 450 | 160 | 9 | 14.2 | 66.5 | 15 |
| 50 | 500 | 170 | 10 | 15.2 | 78.6 | 12.7 |
| 55 | 550 | 180 | 11 | 16.5 | 92.6 | 10.8 |
| 60 | 600 | 190 | 12 | 17.8 | 108 | 9.26 |
The mass of 1 m is calculated for a steel density of 7850 kg/m³. The dimensions h, b, s and t are in millimetres; t is the mean flange thickness.
Section properties
The moments of inertia and resistance are needed to check a beam for strength and deflection. The values are given for the sizes of the DSTU 8768:2018 range, where the beams are 12 m long and made of 3ps (S245) steel.
Hot-rolled steel I-beams · ДСТУ 8768:2018
| Section | h, mm | b, mm | s, mm | t, mm | r1, mm | r2, mm | A, cm² | Mass of 1 m, kg | Metres per tonne | Jy, cm⁴ | Wy, cm³ | iy, mm | Sy, cm³ | Jz, cm⁴ | Wz, cm³ | iz, mm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 140 | 73 | 4.9 | 7.5 | 8 | 3 | 17.4 | 13.7 | 73 | 572 | 81.7 | 57.3 | 46.8 | 41.9 | 11.5 | 15.5 |
| 16 | 160 | 81 | 5 | 7.8 | 8.5 | 3.5 | 20.2 | 15.9 | 62.9 | 873 | 109 | 65.7 | 62.3 | 58.6 | 14.5 | 17 |
| 18 | 180 | 90 | 5.1 | 8.1 | 9 | 3.5 | 23.4 | 18.4 | 54.3 | 1290 | 143 | 74.2 | 81.4 | 82.6 | 18.4 | 18.8 |
| 20 | 200 | 100 | 5.2 | 8.4 | 9.5 | 4 | 26.8 | 21 | 47.6 | 1840 | 184 | 82.8 | 104 | 115 | 23.1 | 20.7 |
| 30 | 300 | 135 | 6.5 | 10.2 | 12 | 5 | 46.5 | 36.5 | 27.4 | 7080 | 472 | 123 | 268 | 337 | 49.9 | 26.9 |
| 36 | 360 | 145 | 7.5 | 12.3 | 14 | 6 | 61.9 | 48.6 | 20.6 | 13380 | 743 | 147 | 423 | 516 | 71.1 | 28.9 |
| 45 | 450 | 160 | 9 | 14.2 | 16 | 7 | 84.7 | 66.5 | 15 | 27696 | 1231 | 181 | 708 | 808 | 101 | 30.9 |
A is the section area; Jy, Wy, iy, Sy are the moment of inertia, section modulus, radius of gyration and first moment of half the section about the y–y axis (the strong axis); Jz, Wz, iz are the same about the z–z axis.
Special I-beams for suspended tracks (M series) · ГОСТ 19425-74
| Section | h, mm | b, mm | s, mm | t, mm | Mass of 1 m, kg | Metres per tonne |
|---|---|---|---|---|---|---|
| 18M | 180 | 90 | 7 | 12 | 25.8 | 38.8 |
| 24M | 240 | 110 | 8.2 | 14 | 38.3 | 26.1 |
| 30M | 300 | 130 | 9 | 15 | 50.2 | 19.9 |
| 36M | 360 | 130 | 9.5 | 16 | 57.9 | 17.3 |
| 45M | 450 | 150 | 10.5 | 18 | 77.6 | 12.9 |
Hole positions · Hot-rolled steel I-beams
| Section | a1, mm | d1 max, mm | a2, mm | d2 max, mm |
|---|---|---|---|---|
| 14 | 40 | 13 | 40 | 15 |
| 16 | 45 | 13 | 40 | 15 |
| 18 | 50 | 15 | 50 | 21 |
| 20 | 55 | 17 | 50 | 19 |
| 30 | 70 | 21 | 65 | 25 |
| 36 | 80 | 25 | 70 | 25 |
| 45 | 90 | 25 | 70 | 25 |
a1 and a2 are the distances to the hole axes in the flange and the web, d1 max and d2 max are the largest hole diameters. The values are for reference.
I-beams with parallel flange faces: series B, Sh and K
In I-beams to GOST 26020-83 the inner flange faces are parallel to the outer ones. The number in the designation is the profile height in centimetres, the letter is the series (B normal, Sh wide-flange, K column), and the last digit is the size number within the series. The actual height does not equal the number exactly: 20B1 is 200 mm high and 26B1 is 258 mm.
I-beams with parallel flange faces: normal flange (B) · ГОСТ 26020-83
| Section | h, mm | b, mm | s, mm | t, mm | Mass of 1 m, kg | Metres per tonne |
|---|---|---|---|---|---|---|
| 10B1 | 100 | 55 | 4.1 | 5.7 | 8.1 | 123 |
| 12B1 | 117.6 | 64 | 3.8 | 5.1 | 8.7 | 115 |
| 12B2 | 120 | 64 | 4.4 | 6.3 | 10.4 | 96.2 |
| 14B1 | 137.4 | 73 | 3.8 | 5.6 | 10.5 | 95.2 |
| 14B2 | 140 | 73 | 4.7 | 6.9 | 12.9 | 77.5 |
| 16B1 | 157 | 82 | 4 | 5.9 | 12.7 | 78.7 |
| 16B2 | 160 | 82 | 5 | 7.4 | 15.8 | 63.3 |
| 18B1 | 177 | 91 | 4.3 | 6.5 | 15.4 | 64.9 |
| 18B2 | 180 | 91 | 5.3 | 8 | 18.8 | 53.2 |
| 20B1 | 200 | 100 | 5.6 | 8.5 | 22.4 | 44.6 |
| 23B1 | 230 | 110 | 5.6 | 9 | 25.8 | 38.8 |
| 26B1 | 258 | 120 | 5.8 | 8.5 | 28 | 35.7 |
| 26B2 | 261 | 120 | 6 | 10 | 31.2 | 32.1 |
| 30B1 | 295 | 140 | 5.8 | 8.5 | 32.9 | 30.4 |
| 30B2 | 299 | 140 | 6 | 10 | 36.6 | 27.3 |
| 35B1 | 346 | 155 | 6.2 | 8.5 | 38.9 | 25.7 |
| 35B2 | 349 | 155 | 6.5 | 10 | 43.3 | 23.1 |
| 40B1 | 392 | 165 | 7 | 9.5 | 48.1 | 20.8 |
| 40B2 | 396 | 165 | 7.5 | 11.5 | 54.7 | 18.3 |
| 45B1 | 443 | 180 | 7.8 | 11 | 59.8 | 16.7 |
| 45B2 | 447 | 180 | 8.4 | 13 | 67.5 | 14.8 |
| 50B1 | 492 | 200 | 8.8 | 12 | 73 | 13.7 |
| 50B2 | 496 | 200 | 9.2 | 14 | 80.7 | 12.4 |
| 55B1 | 543 | 220 | 9.5 | 13.5 | 89 | 11.2 |
| 55B2 | 547 | 220 | 10 | 15.5 | 97.9 | 10.2 |
| 60B1 | 593 | 230 | 10.5 | 15.5 | 106.2 | 9.42 |
| 60B2 | 597 | 230 | 11 | 17.5 | 115.6 | 8.65 |
| 70B1 | 691 | 260 | 12 | 15.5 | 129.3 | 7.73 |
| 70B2 | 697 | 260 | 12.5 | 18.5 | 144.2 | 6.93 |
| 80B1 | 791 | 280 | 13.5 | 17 | 159.5 | 6.27 |
| 80B2 | 798 | 280 | 14 | 20.5 | 177.9 | 5.62 |
| 90B1 | 893 | 300 | 15 | 18.5 | 194 | 5.15 |
| 90B2 | 900 | 300 | 15.5 | 22 | 213.8 | 4.68 |
| 100B1 | 990 | 320 | 16 | 21 | 230.6 | 4.34 |
| 100B2 | 998 | 320 | 17 | 25 | 258.2 | 3.87 |
| 100B3 | 1006 | 320 | 18 | 29 | 285.7 | 3.5 |
| 100B4 | 1013 | 320 | 19.5 | 32.5 | 314.5 | 3.18 |
I-beams with parallel flange faces: wide flange (Sh) · ГОСТ 26020-83
| Section | h, mm | b, mm | s, mm | t, mm | Mass of 1 m, kg | Metres per tonne |
|---|---|---|---|---|---|---|
| 20Sh1 | 193 | 150 | 6 | 9 | 30.6 | 32.7 |
| 23Sh1 | 226 | 155 | 6.5 | 10 | 36.2 | 27.6 |
| 26Sh1 | 251 | 180 | 7 | 10 | 42.7 | 23.4 |
| 26Sh2 | 255 | 180 | 7.5 | 12 | 49.2 | 20.3 |
| 30Sh1 | 291 | 200 | 8 | 11 | 53.6 | 18.7 |
| 30Sh2 | 295 | 200 | 8.5 | 13 | 61 | 16.4 |
| 30Sh3 | 299 | 200 | 9 | 15 | 68.3 | 14.6 |
| 35Sh1 | 338 | 250 | 9.5 | 12.5 | 75.1 | 13.3 |
| 35Sh2 | 341 | 250 | 10 | 14 | 82.2 | 12.2 |
| 35Sh3 | 345 | 250 | 10.5 | 16 | 91.3 | 11 |
| 40Sh1 | 388 | 300 | 9.5 | 14 | 96.1 | 10.4 |
| 40Sh2 | 392 | 300 | 11.5 | 16 | 111.1 | 9 |
| 40Sh3 | 396 | 300 | 12.5 | 18 | 123.4 | 8.1 |
| 50Sh1 | 484 | 300 | 11 | 15 | 114.4 | 8.74 |
| 50Sh2 | 489 | 300 | 14.5 | 17.5 | 138.7 | 7.21 |
| 50Sh3 | 495 | 300 | 15.5 | 20.5 | 156.4 | 6.39 |
| 50Sh4 | 501 | 300 | 16.5 | 23.5 | 174.1 | 5.74 |
| 60Sh1 | 580 | 320 | 12 | 17 | 142.1 | 7.04 |
| 60Sh2 | 587 | 320 | 16 | 20.5 | 176.9 | 5.65 |
| 60Sh3 | 595 | 320 | 18 | 24.5 | 205.5 | 4.87 |
| 60Sh4 | 603 | 320 | 20 | 28.5 | 234.2 | 4.27 |
| 70Sh1 | 683 | 320 | 13.5 | 19 | 169.9 | 5.89 |
| 70Sh2 | 691 | 320 | 15 | 23 | 197.6 | 5.06 |
| 70Sh3 | 700 | 320 | 18 | 27.5 | 235.4 | 4.25 |
| 70Sh4 | 708 | 320 | 20.5 | 31.5 | 268.1 | 3.73 |
| 70Sh5 | 718 | 320 | 23 | 36.5 | 305.9 | 3.27 |
I-beams with parallel flange faces: column (K) · ГОСТ 26020-83
| Section | h, mm | b, mm | s, mm | t, mm | Mass of 1 m, kg | Metres per tonne |
|---|---|---|---|---|---|---|
| 20K1 | 195 | 200 | 6.5 | 10 | 41.5 | 24.1 |
| 20K2 | 198 | 200 | 7 | 11.5 | 46.9 | 21.3 |
| 23K1 | 227 | 240 | 7 | 10.5 | 52.2 | 19.2 |
| 23K2 | 230 | 240 | 8 | 12 | 59.5 | 16.8 |
| 26K1 | 255 | 260 | 8 | 12 | 65.2 | 15.3 |
| 26K2 | 258 | 260 | 9 | 13.5 | 73.2 | 13.7 |
| 26K3 | 262 | 260 | 10 | 15.5 | 83.1 | 12 |
| 30K1 | 296 | 300 | 9 | 13.5 | 84.8 | 11.8 |
| 30K2 | 300 | 300 | 10 | 15.5 | 96.3 | 10.4 |
| 30K3 | 304 | 300 | 11.5 | 17.5 | 108.9 | 9.18 |
| 35K1 | 343 | 350 | 10 | 15 | 109.7 | 9.12 |
| 35K2 | 348 | 350 | 11 | 17.5 | 125.9 | 7.94 |
| 35K3 | 353 | 350 | 13 | 20 | 144.5 | 6.92 |
| 40K1 | 393 | 400 | 11 | 16.5 | 138 | 7.25 |
| 40K2 | 400 | 400 | 13 | 20 | 165.6 | 6.04 |
| 40K3 | 409 | 400 | 16 | 24.5 | 202.3 | 4.94 |
| 40K4 | 419 | 400 | 19 | 29.5 | 242.2 | 4.13 |
| 40K5 | 431 | 400 | 23 | 35.5 | 291.2 | 3.43 |
The mass of 1 m is calculated for a steel density of 7850 kg/m³. The dimensions h, b, s and t are in millimetres.
How to get the mass of a beam from the table
The mass of a beam is its mass per metre times its length. A No. 30 I-beam weighs 36.5 kg/m, so a six-metre beam is 219 kg, and a tonne of this section is 27.4 m long. A No. 20 beam (21 kg/m) gives 47.6 m per tonne.
The “Metres per tonne” column helps when buying by weight: divide the length you need by this figure to get the mass in tonnes.
Where I-beams are used
An I-beam works in bending, so it is used for floor and roof beams, purlins, crane-runway girders and, in built-up sections, frame columns. The M series is meant for suspended tracks: hoists and overhead cranes run on its lower flange.
Calculator and ordering
The mass of any number of I-beams can be worked out in the rolled metal calculator. If you need the beams as part of a structure, send a drawing or a specification: the POLYGONAL company makes steel structures to the customer’s drawings.
Updated:
I-beam sections: frequently asked questions
How much does a No. 20 I-beam weigh?
A No. 20 I-beam weighs 21 kg per metre, and a No. 20a with a wider flange weighs 22.7 kg. A six-metre No. 20 beam is about 126 kg.
What does the I-beam number mean?
It is the height of the profile in centimetres: a No. 30 beam is 300 mm high. The letter “a” shows that the flange is wider than that of the base profile of this number.
How does an M-series I-beam differ from an ordinary one?
The M series is made for suspended tracks, so the profile has different proportions. The mass of 1 m is 38.3 kg for No. 24M and 57.9 kg for No. 36M.
How do I find how many metres of I-beam make a tonne?
Divide 1000 kg by the mass of 1 m. For a No. 16 beam (15.9 kg/m) it is about 63 m.
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