--- title: Universal Column Sizes UK: UC Dimensions Table | Koyda url: https://www.koyda.com/steel-section-tables/universal-columns/ description: UC sizes and dimensions for all UK universal columns, 152×152×23 to 356×406×634: mass, h, b, tw, tf, r, area, Ix and Wel. Free CSV download and PDF. last_modified: 2026-10-10 publisher: Koyda Ltd, Units 27–29 Jesmor Farm, St Piers Lane, Lingfield, Surrey RH7 6PN. 07753 213617, joe@koyda.com --- Steel section tables · 02 / 08 # Universal Column (UC) Sizes and Dimensions Universal columns (UC) are H-sections with wide flanges, close to square overall. They are mainly used as columns. Sizes are written depth × width × mass per metre. 36 sizes · 152 × 152 × 23 to 356 × 406 × 634 · BS 4-1 / BS EN 10365 Fig. 02 · UCNot to scale Symbols ## Symbol key Mass : Mass per metre : kg/m h : Depth of section : mm b : Width of section : mm tw : Web thickness : mm tf : Flange thickness : mm r : Root radius : mm A : Area of section : cm² Ix : Second moment of area, major axis x–x : cm⁴ Wel,x : Elastic section modulus, major axis x–x : cm³ † Root radius from current manufacturer data to BS EN 10365:2017. Older BS 4-1:2005 tables give a smaller radius for these sizes; area and I are then about 1–2% lower. DownloadsUC * [CSV Universal columns table](https://www.koyda.com/steel-section-tables/csv/koyda-universal-columns.csv) * [PDF All eight tables, A4](https://www.koyda.com/steel-section-tables/koyda-steel-section-tables.pdf) * [SVG Section diagram](https://www.koyda.com/steel-section-tables/diagrams/koyda-uc-section-diagram.svg) Need sections cut, drilled or fabricated? [Send your drawings →](https://www.koyda.com/contact-us/#upload) Table ## Universal columns table Select a column heading to sort. Every row links: add its ID to the address, for example #uc-305x305x97. Popular sizes * [152 × 152 × 23 23.0 kg/m](#uc-152x152x23) * [152 × 152 × 30 30.0 kg/m](#uc-152x152x30) * [203 × 203 × 46 46.1 kg/m](#uc-203x203x46) * [254 × 254 × 73 73.1 kg/m](#uc-254x254x73) * [305 × 305 × 97 96.9 kg/m](#uc-305x305x97) Universal columns (UC): dimensions and properties, 36 sizes. Values are nominal. | Designationserial size | Masskg/m | hmm | bmm | twmm | tfmm | rmm | Acm² | Ixcm⁴ | Wel,xcm³ | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 152 × 152 × 23 | 23.0 | 152.4 | 152.2 | 5.8 | 6.8 | 7.6 | 29.2 | 1,250 | 164 | | 152 × 152 × 30 | 30.0 | 157.6 | 152.9 | 6.5 | 9.4 | 7.6 | 38.3 | 1,748 | 222 | | 152 × 152 × 37 | 37.0 | 161.8 | 154.4 | 8.0 | 11.5 | 7.6 | 47.1 | 2,210 | 273 | | 152 × 152 × 44 | 44.0 | 166.0 | 155.9 | 9.5 | 13.6 | 7.6 | 56.1 | 2,703 | 326 | | 152 × 152 × 51 | 51.2 | 170.2 | 157.4 | 11.0 | 15.7 | 7.6 | 65.2 | 3,227 | 379 | | 203 × 203 × 46 | 46.1 | 203.2 | 203.6 | 7.2 | 11.0 | 12.7† | 59.2 | 4,605 | 453 | | 203 × 203 × 52 | 52.0 | 206.2 | 204.3 | 7.9 | 12.5 | 12.7† | 66.8 | 5,296 | 514 | | 203 × 203 × 60 | 60.0 | 209.6 | 205.8 | 9.4 | 14.2 | 12.7† | 76.9 | 6,162 | 588 | | 203 × 203 × 71 | 71.0 | 215.8 | 206.4 | 10.0 | 17.3 | 12.7† | 90.9 | 7,655 | 709 | | 203 × 203 × 86 | 86.1 | 222.2 | 209.1 | 12.7 | 20.5 | 12.7† | 110 | 9,486 | 854 | | 203 × 203 × 100 | 99.6 | 228.6 | 210.3 | 14.5 | 23.7 | 12.7† | 127 | 11,335 | 992 | | 203 × 203 × 113 | 113.5 | 235.0 | 212.1 | 16.3 | 26.9 | 12.7† | 145 | 13,338 | 1,135 | | 203 × 203 × 127 | 127.5 | 241.4 | 213.9 | 18.1 | 30.1 | 12.7† | 163 | 15,474 | 1,282 | | 254 × 254 × 73 | 73.1 | 254.1 | 254.6 | 8.6 | 14.2 | 20.0† | 95.2 | 11,643 | 916 | | 254 × 254 × 89 | 88.9 | 260.3 | 256.3 | 10.3 | 17.3 | 20.0† | 115 | 14,504 | 1,114 | | 254 × 254 × 107 | 107.1 | 266.7 | 258.8 | 12.8 | 20.5 | 20.0† | 138 | 17,747 | 1,331 | | 254 × 254 × 132 | 132.0 | 276.3 | 261.3 | 15.3 | 25.3 | 20.0† | 170 | 22,765 | 1,648 | | 254 × 254 × 167 | 167.1 | 289.1 | 265.2 | 19.2 | 31.7 | 20.0† | 215 | 30,234 | 2,092 | | 305 × 305 × 97 | 96.9 | 307.9 | 305.3 | 9.9 | 15.4 | 20.0† | 125 | 22,504 | 1,462 | | 305 × 305 × 118 | 117.9 | 314.5 | 307.4 | 12.0 | 18.7 | 20.0† | 152 | 27,927 | 1,776 | | 305 × 305 × 137 | 136.9 | 320.5 | 309.2 | 13.8 | 21.7 | 20.0† | 176 | 33,070 | 2,064 | | 305 × 305 × 158 | 158.1 | 327.1 | 311.2 | 15.8 | 25.0 | 20.0† | 203 | 39,002 | 2,385 | | 305 × 305 × 198 | 198.1 | 339.9 | 314.5 | 19.1 | 31.4 | 20.0† | 254 | 51,159 | 3,010 | | 305 × 305 × 240 | 240.0 | 352.5 | 318.4 | 23.0 | 37.7 | 20.0† | 307 | 64,458 | 3,657 | | 305 × 305 × 283 | 282.9 | 365.3 | 322.2 | 26.8 | 44.1 | 20.0† | 362 | 79,127 | 4,332 | | 356 × 368 × 129 | 129.0 | 355.6 | 368.6 | 10.4 | 17.5 | 20.0† | 166 | 40,591 | 2,283 | | 356 × 368 × 153 | 152.9 | 362.0 | 370.5 | 12.3 | 20.7 | 20.0† | 196 | 48,935 | 2,704 | | 356 × 368 × 177 | 177.0 | 368.2 | 372.6 | 14.4 | 23.8 | 20.0† | 227 | 57,464 | 3,121 | | 356 × 368 × 202 | 201.9 | 374.6 | 374.7 | 16.5 | 27.0 | 20.0† | 259 | 66,607 | 3,556 | | 356 × 406 × 235 | 235.1 | 381.0 | 394.8 | 18.4 | 30.2 | 20.0† | 301 | 79,431 | 4,170 | | 356 × 406 × 287 | 287.1 | 393.6 | 399.0 | 22.6 | 36.5 | 20.0† | 367 | 100,221 | 5,093 | | 356 × 406 × 340 | 339.9 | 406.4 | 403.0 | 26.6 | 42.9 | 20.0† | 434 | 122,889 | 6,048 | | 356 × 406 × 393 | 393.0 | 419.0 | 407.0 | 30.6 | 49.2 | 20.0† | 502 | 146,964 | 7,015 | | 356 × 406 × 467 | 467.0 | 436.6 | 412.2 | 35.8 | 58.0 | 20.0† | 596 | 183,349 | 8,399 | | 356 × 406 × 551 | 551.0 | 455.6 | 418.5 | 42.1 | 67.5 | 20.0† | 703 | 227,284 | 9,977 | | 356 × 406 × 634 | 633.9 | 474.6 | 424.0 | 47.6 | 77.0 | 20.0† | 809 | 275,191 | 11,597 | Values are nominal. [Reference only](#disclaimer): 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. Weight calculatorkg The calculator needs JavaScript. Use the mass per metre from the table: weight = mass × length × quantity. Questions ## Frequently asked questions How are universal column sizes written? Serial size then mass per metre: a 203 × 203 × 46 UC weighs about 46 kg per metre. The actual depth and width differ a little from the serial size. This one is 203.2 mm deep and 203.6 mm wide. Can a UC be used as a beam? Yes. UCs are often used as beams where depth is limited, for example in shallow floors or over openings. For the same weight a UB is usually stiffer in bending, so the engineer will compare both. How do I work out the weight of a column? Multiply the mass per metre by the length. A 203 × 203 × 46 UC at 3.5 m weighs 46.1 × 3.5 = 161.4 kg, before base plates, cap plates and fittings. Why do some rows have a † next to the root radius? For these sizes the current manufacturer data to BS EN 10365:2017 gives a larger root radius than older BS 4-1:2005 tables. We show the current figures. The CSV also lists the older radius. 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. Other section tables ## Other section tables [UBUniversal beams](https://www.koyda.com/steel-section-tables/universal-beams/)[PFCParallel flange channels](https://www.koyda.com/steel-section-tables/parallel-flange-channels/)[EAEqual angles](https://www.koyda.com/steel-section-tables/equal-angles/)[UAUnequal angles](https://www.koyda.com/steel-section-tables/unequal-angles/)[SHSSquare hollow sections](https://www.koyda.com/steel-section-tables/square-hollow-sections/)[RHSRectangular hollow sections](https://www.koyda.com/steel-section-tables/rectangular-hollow-sections/)[CHSCircular hollow sections](https://www.koyda.com/steel-section-tables/circular-hollow-sections/)