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04 · Structural Sections

Structural hollow sections: SHS, RHS and CHS

Imperial values are converted from metric; section and sheet designations stay metric.

Units
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04

Structural Sections

Hollow and open hot-rolled sections plus cold-formed profiles for frames, subframes, canopies and secondary steel.

ST-HSStructural Hollow Sections

SHS, RHS and CHS — cold-formed and hot-finished tube.

BHtr₁r₀ = external corner radius
Square hollow section with dimensions
Standards
EN 10219 (cold-formed) · EN 10210 (hot-finished) · ASTM A500 Gr.B / C
Grades
S235JRH · S275J0H · S355J2H
Finish
Black · varnished · pre-galvanised · after fabrication (ISO 1461)
Length
6.0 m standard; 12.0 m to order19.7 ft standard; 39.4 ft to order
Light gauge
1.2–2.0 mm tube for enclosures, gates, furniture0.047–0.079 in tube for enclosures, gates, furniture

Cold-formed EN 10219 — theoretical mass (7.85 kg/dm³); hot-finished EN 10210 is heavier

SHS B × B × t (mm)
SHS B × B × t (mm)SHS B × B × t (in)
20×20×1.50.787×0.787×0.0590.830.56
25×25×20.984×0.984×0.0791.360.91
30×30×21.18×1.18×0.0791.681.13
40×40×21.57×1.57×0.0792.311.55
40×40×31.57×1.57×0.1183.302.22
50×50×31.97×1.97×0.1184.252.86
60×60×32.36×2.36×0.1185.193.49
80×80×43.15×3.15×0.1579.226.20
100×100×53.94×3.94×0.19714.419.68
150×150×65.91×5.91×0.23626.4017.74
RHS B × H × t (mm)
RHS B × H × t (mm)RHS B × H × t (in)
40×20×1.51.57×0.787×0.0591.300.87
50×25×21.97×0.984×0.0792.151.44
60×40×22.36×1.57×0.0792.931.97
60×40×32.36×1.57×0.1184.252.86
80×40×33.15×1.57×0.1185.193.49
100×50×33.94×1.97×0.1186.604.43
100×50×43.94×1.97×0.1578.595.77
120×60×44.72×2.36×0.15710.487.04
150×100×55.91×3.94×0.19718.3312.32
200×100×67.87×3.94×0.23626.4017.74
CHS D × t (mm)
CHS D × t (mm)CHS D × t (in)
21.3×2.00.839×0.0790.950.64
26.9×2.01.06×0.0791.230.83
33.7×2.61.33×0.1021.991.34
42.4×2.61.67×0.1022.551.71
48.3×2.91.90×0.1143.252.18
60.3×3.22.37×0.1264.513.03
76.1×3.23.00×0.1265.753.86
88.9×3.23.50×0.1266.764.54
114.3×3.64.50×0.1429.836.61
139.7×4.05.50×0.15713.399.00
SPECIFY ASST-HS · S355J2H · SHS 80 × 80 × 4 mm · EN 10219 · pre-galvanised · 6.0 m · EN 10204 3.1 · 240 lengths

Last reviewed 2026-09-26 by the Mulk Trading technical team

Standards referenced: EN 10219, EN 10210, ASTM A500, ISO 1461, EN 10204

Specifications and ranges are indicative; the quotation, order confirmation and mill certificate are binding.

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