Steel section tables · 08 / 08
Circular Hollow Section (CHS) Sizes
Circular hollow sections (CHS) are round tubes. They are used for columns, handrails, canopies and feature steelwork. Sizes are written outside diameter × wall thickness. This table covers hot-finished sections.
Symbols
Symbol key
- Mass
- Mass per metre
- kg/m
- d
- Outside diameter
- mm
- t
- Thickness
- mm
- A
- Area of section
- cm²
- I
- Second moment of area
- cm⁴
- Wel
- Elastic section modulus
- cm³
Table
Circular hollow sections table
Select a column heading to sort. Every row links: add its ID to the address, for example #chs-219-1x5.
Popular sizes
| Designationserial size | Masskg/m | dmm | tmm | Acm² | Icm⁴ | Welcm³ |
|---|---|---|---|---|---|---|
| 42.4 × 3.2 | 3.09 | 42.4 | 3.2 | 3.94 | 7.62 | 3.59 |
| 42.4 × 3.6 | 3.44 | 42.4 | 3.6 | 4.39 | 8.33 | 3.93 |
| 42.4 × 4.0 | 3.79 | 42.4 | 4.0 | 4.83 | 8.99 | 4.24 |
| 42.4 × 5.0 | 4.61 | 42.4 | 5.0 | 5.87 | 10.5 | 4.93 |
| 48.3 × 3.2 | 3.56 | 48.3 | 3.2 | 4.53 | 11.6 | 4.8 |
| 48.3 × 3.6 | 3.97 | 48.3 | 3.6 | 5.06 | 12.7 | 5.26 |
| 48.3 × 4.0 | 4.37 | 48.3 | 4.0 | 5.57 | 13.8 | 5.7 |
| 48.3 × 5.0 | 5.34 | 48.3 | 5.0 | 6.8 | 16.2 | 6.69 |
| 48.3 × 6.3 | 6.53 | 48.3 | 6.3 | 8.31 | 18.7 | 7.76 |
| 60.3 × 3.2 | 4.51 | 60.3 | 3.2 | 5.74 | 23.5 | 7.78 |
| 60.3 × 3.6 | 5.03 | 60.3 | 3.6 | 6.41 | 25.9 | 8.58 |
| 60.3 × 4.0 | 5.55 | 60.3 | 4.0 | 7.07 | 28.2 | 9.34 |
| 60.3 × 5.0 | 6.82 | 60.3 | 5.0 | 8.69 | 33.5 | 11.1 |
| 60.3 × 6.3 | 8.39 | 60.3 | 6.3 | 10.7 | 39.5 | 13.1 |
| 60.3 × 8.0 | 10.3 | 60.3 | 8.0 | 13.1 | 46 | 15.3 |
| 76.1 × 3.2 | 5.75 | 76.1 | 3.2 | 7.33 | 48.8 | 12.8 |
| 76.1 × 3.6 | 6.44 | 76.1 | 3.6 | 8.2 | 54 | 14.2 |
| 76.1 × 4.0 | 7.11 | 76.1 | 4.0 | 9.06 | 59.1 | 15.5 |
| 76.1 × 5.0 | 8.77 | 76.1 | 5.0 | 11.2 | 70.9 | 18.6 |
| 76.1 × 6.3 | 10.8 | 76.1 | 6.3 | 13.8 | 84.8 | 22.3 |
| 76.1 × 8.0 | 13.4 | 76.1 | 8.0 | 17.1 | 101 | 26.4 |
| 88.9 × 3.2 | 6.76 | 88.9 | 3.2 | 8.62 | 79.2 | 17.8 |
| 88.9 × 3.6 | 7.57 | 88.9 | 3.6 | 9.65 | 87.9 | 19.8 |
| 88.9 × 4.0 | 8.38 | 88.9 | 4.0 | 10.7 | 96.3 | 21.7 |
| 88.9 × 5.0 | 10.3 | 88.9 | 5.0 | 13.2 | 116 | 26.2 |
| 88.9 × 6.3 | 12.8 | 88.9 | 6.3 | 16.3 | 140 | 31.5 |
| 88.9 × 8.0 | 16.0 | 88.9 | 8.0 | 20.3 | 168 | 37.8 |
| 88.9 × 10.0 | 19.5 | 88.9 | 10.0 | 24.8 | 196 | 44.1 |
| 114.3 × 3.6 | 9.83 | 114.3 | 3.6 | 12.5 | 192 | 33.6 |
| 114.3 × 4.0 | 10.9 | 114.3 | 4.0 | 13.9 | 211 | 36.9 |
| 114.3 × 5.0 | 13.5 | 114.3 | 5.0 | 17.2 | 257 | 45 |
| 114.3 × 6.3 | 16.8 | 114.3 | 6.3 | 21.4 | 313 | 54.7 |
| 114.3 × 8.0 | 21.0 | 114.3 | 8.0 | 26.7 | 379 | 66.4 |
| 114.3 × 10.0 | 25.7 | 114.3 | 10.0 | 32.8 | 450 | 78.7 |
| 139.7 × 3.6 | 12.1 | 139.7 | 3.6 | 15.4 | 357 | 51.1 |
| 139.7 × 4.0 | 13.4 | 139.7 | 4.0 | 17.1 | 393 | 56.2 |
| 139.7 × 5.0 | 16.6 | 139.7 | 5.0 | 21.2 | 481 | 68.8 |
| 139.7 × 6.3 | 20.7 | 139.7 | 6.3 | 26.4 | 589 | 84.3 |
| 139.7 × 8.0 | 26.0 | 139.7 | 8.0 | 33.1 | 720 | 103 |
| 168.3 × 5.0 | 20.1 | 168.3 | 5.0 | 25.7 | 856 | 102 |
| 168.3 × 6.3 | 25.2 | 168.3 | 6.3 | 32.1 | 1,050 | 125 |
| 168.3 × 8.0 | 31.6 | 168.3 | 8.0 | 40.3 | 1,300 | 154 |
| 168.3 × 10.0 | 39.0 | 168.3 | 10.0 | 49.7 | 1,560 | 186 |
| 168.3 × 12.5 | 48.0 | 168.3 | 12.5 | 61.2 | 1,870 | 222 |
| 193.7 × 5.0 | 23.3 | 193.7 | 5.0 | 29.6 | 1,320 | 136 |
| 193.7 × 6.3 | 29.1 | 193.7 | 6.3 | 37.1 | 1,630 | 168 |
| 193.7 × 8.0 | 36.6 | 193.7 | 8.0 | 46.7 | 2,020 | 208 |
| 193.7 × 10.0 | 45.3 | 193.7 | 10.0 | 57.7 | 2,440 | 252 |
| 193.7 × 12.5 | 55.9 | 193.7 | 12.5 | 71.2 | 2,930 | 303 |
| 193.7 × 14.2 | 62.9 | 193.7 | 14.2 | 80.1 | 3,240 | 335 |
| 193.7 × 16.0 | 70.1 | 193.7 | 16.0 | 89.3 | 3,550 | 367 |
| 219.1 × 5.0 | 26.4 | 219.1 | 5.0 | 33.6 | 1,930 | 176 |
| 219.1 × 6.3 | 33.1 | 219.1 | 6.3 | 42.1 | 2,390 | 218 |
| 219.1 × 8.0 | 41.6 | 219.1 | 8.0 | 53.1 | 2,960 | 270 |
| 219.1 × 10.0 | 51.6 | 219.1 | 10.0 | 65.7 | 3,600 | 328 |
| 219.1 × 12.5 | 63.7 | 219.1 | 12.5 | 81.1 | 4,340 | 397 |
| 219.1 × 14.2 | 71.8 | 219.1 | 14.2 | 91.4 | 4,820 | 440 |
| 219.1 × 16.0 | 80.1 | 219.1 | 16.0 | 102 | 5,300 | 483 |
| 244.5 × 5.0 | 29.5 | 244.5 | 5.0 | 37.6 | 2,700 | 221 |
| 244.5 × 6.3 | 37.0 | 244.5 | 6.3 | 47.1 | 3,350 | 274 |
| 244.5 × 8.0 | 46.7 | 244.5 | 8.0 | 59.4 | 4,160 | 340 |
| 244.5 × 10.0 | 57.8 | 244.5 | 10.0 | 73.7 | 5,070 | 415 |
| 244.5 × 12.5 | 71.5 | 244.5 | 12.5 | 91.1 | 6,150 | 503 |
| 244.5 × 14.2 | 80.6 | 244.5 | 14.2 | 103 | 6,840 | 559 |
| 244.5 × 16.0 | 90.2 | 244.5 | 16.0 | 115 | 7,530 | 616 |
| 273 × 5.0 | 33.0 | 273 | 5.0 | 42.1 | 3,780 | 277 |
| 273 × 6.3 | 41.4 | 273 | 6.3 | 52.8 | 4,700 | 344 |
| 273 × 8.0 | 52.3 | 273 | 8.0 | 66.6 | 5,850 | 429 |
| 273 × 10.0 | 64.9 | 273 | 10.0 | 82.6 | 7,150 | 524 |
| 273 × 12.5 | 80.3 | 273 | 12.5 | 102 | 8,700 | 637 |
| 273 × 14.2 | 90.6 | 273 | 14.2 | 115 | 9,700 | 710 |
| 273 × 16.0 | 101.0 | 273 | 16.0 | 129 | 10,700 | 784 |
| 273 × 17.5 | 110.0 | 273 | 17.5 | 140 | 11,500 | 844 |
| 323.9 × 5.0 | 39.3 | 323.9 | 5.0 | 50.1 | 6,370 | 393 |
| 323.9 × 6.3 | 49.3 | 323.9 | 6.3 | 62.9 | 7,930 | 490 |
| 323.9 × 8.0 | 62.3 | 323.9 | 8.0 | 79.4 | 9,910 | 612 |
| 323.9 × 10.0 | 77.4 | 323.9 | 10.0 | 98.6 | 12,200 | 751 |
| 323.9 × 12.5 | 96.0 | 323.9 | 12.5 | 122 | 14,800 | 917 |
| 323.9 × 14.2 | 108.0 | 323.9 | 14.2 | 138 | 16,600 | 1,020 |
| 323.9 × 16.0 | 121.0 | 323.9 | 16.0 | 155 | 18,400 | 1,140 |
| 323.9 × 17.5 | 132.0 | 323.9 | 17.5 | 168 | 19,800 | 1,220 |
| 355.6 × 6.3 | 54.3 | 355.6 | 6.3 | 69.1 | 10,500 | 593 |
| 355.6 × 8.0 | 68.6 | 355.6 | 8.0 | 87.4 | 13,200 | 742 |
| 355.6 × 10.0 | 85.2 | 355.6 | 10.0 | 109 | 16,200 | 912 |
| 355.6 × 12.5 | 106.0 | 355.6 | 12.5 | 135 | 19,900 | 1,120 |
| 355.6 × 14.2 | 120.0 | 355.6 | 14.2 | 152 | 22,200 | 1,250 |
| 355.6 × 16.0 | 134.0 | 355.6 | 16.0 | 171 | 24,700 | 1,390 |
| 355.6 × 17.5 | 146.0 | 355.6 | 17.5 | 186 | 26,600 | 1,500 |
| 406.4 × 10.0 | 97.8 | 406.4 | 10.0 | 125 | 24,500 | 1,200 |
| 406.4 × 12.5 | 121.0 | 406.4 | 12.5 | 155 | 30,000 | 1,480 |
| 406.4 × 14.2 | 137.0 | 406.4 | 14.2 | 175 | 33,700 | 1,660 |
| 406.4 × 16.0 | 154.0 | 406.4 | 16.0 | 196 | 37,400 | 1,840 |
| 406.4 × 17.5 | 168.0 | 406.4 | 17.5 | 214 | 40,500 | 1,990 |
| 457 × 10.0 | 110.0 | 457 | 10.0 | 140 | 35,100 | 1,540 |
| 457 × 12.5 | 137.0 | 457 | 12.5 | 175 | 43,100 | 1,890 |
| 457 × 14.2 | 155.0 | 457 | 14.2 | 198 | 48,500 | 2,120 |
| 457 × 16.0 | 174.0 | 457 | 16.0 | 222 | 54,000 | 2,360 |
| 457 × 17.5 | 190.0 | 457 | 17.5 | 242 | 58,400 | 2,560 |
| 508 × 10.0 | 123.0 | 508 | 10.0 | 156 | 48,500 | 1,910 |
| 508 × 12.5 | 153.0 | 508 | 12.5 | 195 | 59,800 | 2,350 |
| 508 × 14.2 | 173.0 | 508 | 14.2 | 220 | 67,200 | 2,650 |
| 508 × 16.0 | 194.0 | 508 | 16.0 | 247 | 74,900 | 2,950 |
| 508 × 17.5 | 212.0 | 508 | 17.5 | 270 | 81,200 | 3,200 |
Values are nominal. Reference only: check against current manufacturer data and a structural engineer before design use.
Calculator
Steel weight calculator
Pick a section and size, enter the length and quantity, and get the total weight. Plate and flat bar are worked out from their dimensions at 7,850 kg/m³.
- Section weight = mass per metre × length × quantity
- Plate or flat bar weight = length × width × thickness × 7,850 kg/m³ × quantity
A 305 × 165 × 40 UB is 40.3 kg/m, so four 6 m lengths weigh 40.3 × 6 × 4 = 967.2 kg. A 10 mm plate 1,000 × 500 mm weighs 1.0 × 0.5 × 0.01 × 7,850 = 39.25 kg. Weights are nominal and exclude coatings, plates and fittings.
Questions
Frequently asked questions
Why are CHS diameters numbers like 48.3 or 114.3?
They come from the traditional pipe sizes. For example, 48.3 mm is the outside diameter of 1½ inch pipe, which is why it is the common size for scaffold tube and handrails.
How are CHS sizes written?
Outside diameter × wall thickness in millimetres. A 114.3 × 5.0 CHS has a 114.3 mm outside diameter and a 5 mm wall.
How do I work out the weight of a CHS?
Multiply the mass per metre by the length. A 114.3 × 5.0 CHS at 4 m weighs 13.5 × 4 = 54.0 kg.
Is this table hot-finished or cold-formed?
Hot-finished, to BS EN 10210-2. Cold-formed CHS to BS EN 10219 come in similar sizes but are a different product, so check which one is specified.
Standards
Standards referenced
- BS 4-1:2005 Structural steel sections. Specification for hot-rolled sections (UB, UC, PFC)
- BS EN 10365:2017 Hot rolled steel channels, I and H sections. Dimensions and masses
- BS EN 10056-1:2017 Structural steel equal and unequal leg angles. Dimensions
- BS EN 10210-2:2019 Hot finished steel structural hollow sections. Tolerances, dimensions and sectional properties
- BS EN 10219-2:2019 Cold formed welded steel structural hollow sections (not covered by these tables)
Reference only
Reference only. Values are nominal figures for the standard UK section ranges. Check them against current manufacturer data, and have a structural engineer confirm sizes before you use them in design. Koyda Ltd accepts no liability for decisions based on these tables.
Sizes and dimensions are compiled from the standard section ranges and checked against current manufacturer data (British Steel for beams, columns, channels and large angles; Tata Steel Celsius for hollow sections) and independent published tables. We recalculated area, second moment of area and elastic modulus from the nominal dimensions for every size, and show a value only where it matches a published figure. Diagrams and layout are our own.
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