Circular Hollow Sections (CHS) — Sizes, Dimensions & Properties

124 sections across 19 serial size groups. Click a group to view full properties for all sizes.

26.9
1 size
1.87 — 1.87 kg/m
33.7
4 sizes
2.93 — 1.99 kg/m
42.4
4 sizes
4.61 — 2.55 kg/m
48.3
5 sizes
5.34 — 3.35 kg/m
60.3
4 sizes
6.82 — 4.24 kg/m
76.1
5 sizes
8.77 — 5.24 kg/m
88.9
6 sizes
12.8 — 6.36 kg/m
114.3
8 sizes
16.8 — 8.23 kg/m
139.7
6 sizes
32 — 13.4 kg/m
168.3
7 sizes
48 — 16.2 kg/m
193.7
8 sizes
55.9 — 18.7 kg/m
219.1
10 sizes
80.1 — 23.8 kg/m
244.5
8 sizes
90.2 — 29.5 kg/m
273
9 sizes
101 — 33 kg/m
323.9
9 sizes
121 — 39.3 kg/m
355.6
8 sizes
134 — 43.2 kg/m
406.4
8 sizes
154 — 59.2 kg/m
457
7 sizes
174 — 66.7 kg/m
508
7 sizes
194 — 74.3 kg/m

About Circular Hollow Sections (CHS)

Circular Hollow Sections (CHS) are round tubes used as columns, struts, architectural features, and handrails. Their uniform shape gives equal strength and stiffness in all directions, making them ideal for compression members and aesthetically exposed steelwork. Available from 26.9mm to 508.0mm outside diameter.

This page shows section properties for all 124 standard UK circular hollow sections (chs) 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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