200x100 RHS — Sizes, Dimensions & Properties

9 sizes in the 200x100 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)
200x100x4.0	18.1	200	100	4	23.1	1,213	414
200x100x5.0	22.6	200	100	5	28.7	1,495	505
200x100x6.0	26.8	200	100	6	34.2	1,754	589
200x100x6.3	28.1	200	100	6.3	35.8	1,829	613
200x100x8.0	35.1	200	100	8	44.8	2,234	739
200x100x10.0	43.1	200	100	10	54.9	2,664	869
200x100x12.0	50.8	200	100	12	64.7	3,047	979
200x100x12.5	52.7	200	100	12.5	67.1	3,136	1,004
200x100x16.0	65.2	200	100	16	83	3,678	1,147

200x100x4.0 RHS

Designation: 200x100x4.0
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 4 mm
Mass per Metre: 18.1 kg/m
Cross-Sectional Area: 23.1 cm2
Second Moment of Area Ixx: 1,213 cm4
Second Moment of Area Iyy: 414 cm4
Elastic Modulus Zxx: 121 cm3
Elastic Modulus Zyy: 82.8 cm3
Plastic Modulus Sxx: 149 cm3
Plastic Modulus Syy: 92.4 cm3
Radius of Gyration rxx: 7.25 cm
Radius of Gyration ryy: 4.23 cm
Torsional Constant (It): 986 cm4
Surface Area per Metre: 0.587 m2/m
Surface Area per Tonne: 32.4 m2/t

200x100x5.0 RHS

Designation: 200x100x5.0
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 5 mm
Mass per Metre: 22.6 kg/m
Cross-Sectional Area: 28.7 cm2
Second Moment of Area Ixx: 1,495 cm4
Second Moment of Area Iyy: 505 cm4
Elastic Modulus Zxx: 149 cm3
Elastic Modulus Zyy: 101 cm3
Plastic Modulus Sxx: 185 cm3
Plastic Modulus Syy: 114 cm3
Radius of Gyration rxx: 7.21 cm
Radius of Gyration ryy: 4.19 cm
Torsional Constant (It): 1,204 cm4
Surface Area per Metre: 0.587 m2/m
Surface Area per Tonne: 26 m2/t

200x100x6.0 RHS

Designation: 200x100x6.0
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 6 mm
Mass per Metre: 26.8 kg/m
Cross-Sectional Area: 34.2 cm2
Second Moment of Area Ixx: 1,754 cm4
Second Moment of Area Iyy: 589 cm4
Elastic Modulus Zxx: 175 cm3
Elastic Modulus Zyy: 118 cm3
Plastic Modulus Sxx: 218 cm3
Plastic Modulus Syy: 134 cm3
Radius of Gyration rxx: 7.16 cm
Radius of Gyration ryy: 4.15 cm
Torsional Constant (It): 1,414 cm4
Surface Area per Metre: 0.585 m2/m
Surface Area per Tonne: 21.8 m2/t

200x100x6.3 RHS

Designation: 200x100x6.3
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 6.3 mm
Mass per Metre: 28.1 kg/m
Cross-Sectional Area: 35.8 cm2
Second Moment of Area Ixx: 1,829 cm4
Second Moment of Area Iyy: 613 cm4
Elastic Modulus Zxx: 183 cm3
Elastic Modulus Zyy: 123 cm3
Plastic Modulus Sxx: 228 cm3
Plastic Modulus Syy: 140 cm3
Radius of Gyration rxx: 7.15 cm
Radius of Gyration ryy: 4.14 cm
Torsional Constant (It): 1,475 cm4
Surface Area per Metre: 0.584 m2/m
Surface Area per Tonne: 20.8 m2/t

200x100x8.0 RHS

Designation: 200x100x8.0
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 8 mm
Mass per Metre: 35.1 kg/m
Cross-Sectional Area: 44.8 cm2
Second Moment of Area Ixx: 2,234 cm4
Second Moment of Area Iyy: 739 cm4
Elastic Modulus Zxx: 223 cm3
Elastic Modulus Zyy: 148 cm3
Plastic Modulus Sxx: 282 cm3
Plastic Modulus Syy: 172 cm3
Radius of Gyration rxx: 7.06 cm
Radius of Gyration ryy: 4.06 cm
Torsional Constant (It): 1,804 cm4
Surface Area per Metre: 0.579 m2/m
Surface Area per Tonne: 16.5 m2/t

200x100x10.0 RHS

Designation: 200x100x10.0
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 10 mm
Mass per Metre: 43.1 kg/m
Cross-Sectional Area: 54.9 cm2
Second Moment of Area Ixx: 2,664 cm4
Second Moment of Area Iyy: 869 cm4
Elastic Modulus Zxx: 266 cm3
Elastic Modulus Zyy: 174 cm3
Plastic Modulus Sxx: 341 cm3
Plastic Modulus Syy: 206 cm3
Radius of Gyration rxx: 6.96 cm
Radius of Gyration ryy: 3.98 cm
Torsional Constant (It): 2,156 cm4
Surface Area per Metre: 0.574 m2/m
Surface Area per Tonne: 13.3 m2/t

200x100x12.0 RHS

Designation: 200x100x12.0
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 12 mm
Mass per Metre: 50.8 kg/m
Cross-Sectional Area: 64.7 cm2
Second Moment of Area Ixx: 3,047 cm4
Second Moment of Area Iyy: 979 cm4
Elastic Modulus Zxx: 305 cm3
Elastic Modulus Zyy: 196 cm3
Plastic Modulus Sxx: 395 cm3
Plastic Modulus Syy: 237 cm3
Radius of Gyration rxx: 6.86 cm
Radius of Gyration ryy: 3.89 cm
Torsional Constant (It): 2,469 cm4
Surface Area per Metre: 0.569 m2/m
Surface Area per Tonne: 11.2 m2/t

200x100x12.5 RHS

Designation: 200x100x12.5
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 12.5 mm
Mass per Metre: 52.7 kg/m
Cross-Sectional Area: 67.1 cm2
Second Moment of Area Ixx: 3,136 cm4
Second Moment of Area Iyy: 1,004 cm4
Elastic Modulus Zxx: 314 cm3
Elastic Modulus Zyy: 201 cm3
Plastic Modulus Sxx: 408 cm3
Plastic Modulus Syy: 245 cm3
Radius of Gyration rxx: 6.84 cm
Radius of Gyration ryy: 3.87 cm
Torsional Constant (It): 2,541 cm4
Surface Area per Metre: 0.568 m2/m
Surface Area per Tonne: 10.8 m2/t

200x100x16.0 RHS

Designation: 200x100x16.0
Outside Depth (D): 200 mm
Outside Width (B): 100 mm
Wall Thickness (t): 16 mm
Mass per Metre: 65.2 kg/m
Cross-Sectional Area: 83 cm2
Second Moment of Area Ixx: 3,678 cm4
Second Moment of Area Iyy: 1,147 cm4
Elastic Modulus Zxx: 368 cm3
Elastic Modulus Zyy: 229 cm3
Plastic Modulus Sxx: 491 cm3
Plastic Modulus Syy: 290 cm3
Radius of Gyration rxx: 6.66 cm
Radius of Gyration ryy: 3.72 cm
Torsional Constant (It): 2,982 cm4
Surface Area per Metre: 0.559 m2/m
Surface Area per Tonne: 8.6 m2/t

200x100 RHS — Overview

The 200x100 serial size group contains 9 sections, ranging from 65.2 kg/m to 18.1 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.