400x200 RHS — Sizes, Dimensions & Properties

8 sizes in the 400x200 serial size group. All dimensions in mm, section properties in cm units.

Designation	Mass (kg/m)	D (mm)	B (mm)	t (mm)	A (cm2)	Ixx (cm4)	Iyy (cm4)
400x200x6.0	55.1	400	200	6	70.2	14,998	5,142
400x200x6.3	57.8	400	200	6.3	73.6	15,696	5,376
400x200x8.0	72.8	400	200	8	92.8	19,562	6,660
400x200x10.0	90.2	400	200	10	115	23,914	8,084
400x200x12.0	107	400	200	12	137	28,059	9,418
400x200x12.5	112	400	200	12.5	142	29,063	9,738
400x200x14.2	126	400	200	14.2	160	32,400	10,800
400x200x16.0	141	400	200	16	179	35,738	11,824

400x200x6.0 RHS

Designation: 400x200x6.0
Outside Depth (D): 400 mm
Outside Width (B): 200 mm
Wall Thickness (t): 6 mm
Mass per Metre: 55.1 kg/m
Cross-Sectional Area: 70.2 cm2
Second Moment of Area Ixx: 14,998 cm4
Second Moment of Area Iyy: 5,142 cm4
Elastic Modulus Zxx: 750 cm3
Elastic Modulus Zyy: 514 cm3
Plastic Modulus Sxx: 917 cm3
Plastic Modulus Syy: 568 cm3
Radius of Gyration rxx: 14.6 cm
Radius of Gyration ryy: 8.56 cm
Torsional Constant (It): 12,049 cm4
Surface Area per Metre: 1.18 m2/m
Surface Area per Tonne: 21.4 m2/t

400x200x6.3 RHS

Designation: 400x200x6.3
Outside Depth (D): 400 mm
Outside Width (B): 200 mm
Wall Thickness (t): 6.3 mm
Mass per Metre: 57.8 kg/m
Cross-Sectional Area: 73.6 cm2
Second Moment of Area Ixx: 15,696 cm4
Second Moment of Area Iyy: 5,376 cm4
Elastic Modulus Zxx: 785 cm3
Elastic Modulus Zyy: 538 cm3
Plastic Modulus Sxx: 960 cm3
Plastic Modulus Syy: 594 cm3
Radius of Gyration rxx: 14.6 cm
Radius of Gyration ryy: 8.55 cm
Torsional Constant (It): 12,612 cm4
Surface Area per Metre: 1.18 m2/m
Surface Area per Tonne: 20.4 m2/t

400x200x8.0 RHS

Designation: 400x200x8.0
Outside Depth (D): 400 mm
Outside Width (B): 200 mm
Wall Thickness (t): 8 mm
Mass per Metre: 72.8 kg/m
Cross-Sectional Area: 92.8 cm2
Second Moment of Area Ixx: 19,562 cm4
Second Moment of Area Iyy: 6,660 cm4
Elastic Modulus Zxx: 978 cm3
Elastic Modulus Zyy: 666 cm3
Plastic Modulus Sxx: 1,203 cm3
Plastic Modulus Syy: 743 cm3
Radius of Gyration rxx: 14.5 cm
Radius of Gyration ryy: 8.47 cm
Torsional Constant (It): 15,735 cm4
Surface Area per Metre: 1.18 m2/m
Surface Area per Tonne: 16.2 m2/t

400x200x10.0 RHS

Designation: 400x200x10.0
Outside Depth (D): 400 mm
Outside Width (B): 200 mm
Wall Thickness (t): 10 mm
Mass per Metre: 90.2 kg/m
Cross-Sectional Area: 115 cm2
Second Moment of Area Ixx: 23,914 cm4
Second Moment of Area Iyy: 8,084 cm4
Elastic Modulus Zxx: 1,196 cm3
Elastic Modulus Zyy: 808 cm3
Plastic Modulus Sxx: 1,480 cm3
Plastic Modulus Syy: 911 cm3
Radius of Gyration rxx: 14.4 cm
Radius of Gyration ryy: 8.39 cm
Torsional Constant (It): 19,259 cm4
Surface Area per Metre: 1.17 m2/m
Surface Area per Tonne: 13 m2/t

400x200x12.0 RHS

Designation: 400x200x12.0
Outside Depth (D): 400 mm
Outside Width (B): 200 mm
Wall Thickness (t): 12 mm
Mass per Metre: 107 kg/m
Cross-Sectional Area: 137 cm2
Second Moment of Area Ixx: 28,059 cm4
Second Moment of Area Iyy: 9,418 cm4
Elastic Modulus Zxx: 1,403 cm3
Elastic Modulus Zyy: 942 cm3
Plastic Modulus Sxx: 1,748 cm3
Plastic Modulus Syy: 1,072 cm3
Radius of Gyration rxx: 14.3 cm
Radius of Gyration ryy: 8.3 cm
Torsional Constant (It): 22,622 cm4
Surface Area per Metre: 1.17 m2/m
Surface Area per Tonne: 10.9 m2/t

400x200x12.5 RHS

Designation: 400x200x12.5
Outside Depth (D): 400 mm
Outside Width (B): 200 mm
Wall Thickness (t): 12.5 mm
Mass per Metre: 112 kg/m
Cross-Sectional Area: 142 cm2
Second Moment of Area Ixx: 29,063 cm4
Second Moment of Area Iyy: 9,738 cm4
Elastic Modulus Zxx: 1,453 cm3
Elastic Modulus Zyy: 974 cm3
Plastic Modulus Sxx: 1,813 cm3
Plastic Modulus Syy: 1,111 cm3
Radius of Gyration rxx: 14.3 cm
Radius of Gyration ryy: 8.28 cm
Torsional Constant (It): 23,438 cm4
Surface Area per Metre: 1.17 m2/m
Surface Area per Tonne: 10.4 m2/t

400x200x14.2 RHS

Designation: 400x200x14.2
Outside Depth (D): 400 mm
Outside Width (B): 200 mm
Wall Thickness (t): 14.2 mm
Mass per Metre: 126 kg/m
Cross-Sectional Area: 160 cm2
Second Moment of Area Ixx: 32,400 cm4
Second Moment of Area Iyy: 10,800 cm4
Elastic Modulus Zxx: 1,620 cm3
Elastic Modulus Zyy: 1,080 cm3
Plastic Modulus Sxx: 2,030 cm3
Plastic Modulus Syy: 1,240 cm3
Radius of Gyration rxx: 14.2 cm
Radius of Gyration ryy: 8.21 cm
Torsional Constant (It): 26,100 cm4
Surface Area per Metre: 1.16 m2/m
Surface Area per Tonne: 9.2 m2/t

400x200x16.0 RHS

Designation: 400x200x16.0
Outside Depth (D): 400 mm
Outside Width (B): 200 mm
Wall Thickness (t): 16 mm
Mass per Metre: 141 kg/m
Cross-Sectional Area: 179 cm2
Second Moment of Area Ixx: 35,738 cm4
Second Moment of Area Iyy: 11,824 cm4
Elastic Modulus Zxx: 1,787 cm3
Elastic Modulus Zyy: 1,182 cm3
Plastic Modulus Sxx: 2,256 cm3
Plastic Modulus Syy: 1,374 cm3
Radius of Gyration rxx: 14.1 cm
Radius of Gyration ryy: 8.13 cm
Torsional Constant (It): 28,871 cm4
Surface Area per Metre: 1.16 m2/m
Surface Area per Tonne: 8.2 m2/t

400x200 RHS — Overview

The 400x200 serial size group contains 8 sections, ranging from 141 kg/m to 55.1 kg/m. All sections in this group share the same nominal depth and width but differ in web and flange thickness, which affects the weight and structural capacity.

Section properties are sourced from the Tata Steel Blue Book / SCI P363. For structural design to BS EN 1993-1-1 (Eurocode 3), use these properties with the appropriate partial factors from the UK National Annex.

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