Universal Beams (UB) — Sizes, Dimensions & Properties

96 sections across 28 serial size groups. Click a group to view full properties for all sizes.

1016x305
8 sizes
222 — 486.7 kg/m
914x419
2 sizes
343.3 — 388 kg/m
914x305
4 sizes
200.9 — 289.1 kg/m
838x292
3 sizes
175.9 — 226.5 kg/m
762x267
4 sizes
133.9 — 196.8 kg/m
686x254
4 sizes
125.2 — 170.2 kg/m
610x305
3 sizes
149.2 — 238.1 kg/m
610x229
4 sizes
101.2 — 139.9 kg/m
610x178
3 sizes
81.8 — 100.3 kg/m
533x312
4 sizes
150.6 — 273.3 kg/m
533x210
6 sizes
82.2 — 138.3 kg/m
533x165
3 sizes
65.7 — 84.8 kg/m
457x191
8 sizes
67.1 — 161.4 kg/m
457x152
5 sizes
52.3 — 82.1 kg/m
406x178
5 sizes
54.1 — 85.3 kg/m
406x140
3 sizes
39 — 53.3 kg/m
356x171
4 sizes
45 — 67.1 kg/m
356x127
2 sizes
33.1 — 39.1 kg/m
305x165
3 sizes
40.3 — 54 kg/m
305x127
3 sizes
37 — 48.1 kg/m
305x102
3 sizes
24.8 — 32.8 kg/m
254x146
3 sizes
31.1 — 43 kg/m
254x102
3 sizes
22 — 28.3 kg/m
203x133
2 sizes
25.1 — 30 kg/m
203x102
1 size
23.1 — 23.1 kg/m
178x102
1 size
19 — 19 kg/m
152x89
1 size
16 — 16 kg/m
127x76
1 size
13 — 13 kg/m

About Universal Beams (UB)

Universal Beams (UBs) are I-shaped sections used primarily as beams in bending. They have a deeper cross-section relative to their width, making them efficient at resisting bending moments. UBs are the most commonly used structural steel section in UK construction, found in portal frame rafters, floor beams, lintels, and transfer structures. Available in serial sizes from 127x76 to 1016x305.

This page shows section properties for all 96 standard UK universal beams (ub) from the Tata Steel Blue Book (SCI P363). Properties include dimensions, cross-sectional area, second moment of area, elastic and plastic section modulus, radius of gyration, and torsional properties. All values are per BS 4-1:2005 / BS EN 10365.

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Section properties from Tata Steel Blue Book / SCI P363 / BS 4-1:2005.

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