200x120 RHS — Sizes, Dimensions & Properties

8 sizes in the 200x120 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)
200x120x5.0	24.1	200	120	5	30.7	1,690	762
200x120x6.0	28.7	200	120	6	36.5	1,976	890
200x120x6.3	29.9	200	120	6.3	38	2,039	919
200x120x8.0	37.3	200	120	8	47.6	2,490	1,114
200x120x10.0	45.9	200	120	10	58.5	2,978	1,320
200x120x12.0	54.5	200	120	12	69.4	3,459	1,515
200x120x12.5	55.7	200	120	12.5	71	3,468	1,524
200x120x14.2	63.3	200	120	14.2	80.7	3,910	1,690

200x120x5.0 RHS

Designation: 200x120x5.0
Outside Depth (D): 200 mm
Outside Width (B): 120 mm
Wall Thickness (t): 5 mm
Mass per Metre: 24.1 kg/m
Cross-Sectional Area: 30.7 cm2
Second Moment of Area Ixx: 1,690 cm4
Second Moment of Area Iyy: 762 cm4
Elastic Modulus Zxx: 168 cm3
Elastic Modulus Zyy: 127 cm3
Plastic Modulus Sxx: 205 cm3
Plastic Modulus Syy: 144 cm3
Radius of Gyration rxx: 7.4 cm
Radius of Gyration ryy: 4.98 cm
Torsional Constant (It): 1,650 cm4
Surface Area per Metre: 0.627 m2/m
Surface Area per Tonne: 26 m2/t

200x120x6.0 RHS

Designation: 200x120x6.0
Outside Depth (D): 200 mm
Outside Width (B): 120 mm
Wall Thickness (t): 6 mm
Mass per Metre: 28.7 kg/m
Cross-Sectional Area: 36.5 cm2
Second Moment of Area Ixx: 1,976 cm4
Second Moment of Area Iyy: 890 cm4
Elastic Modulus Zxx: 198 cm3
Elastic Modulus Zyy: 148 cm3
Plastic Modulus Sxx: 241 cm3
Plastic Modulus Syy: 169 cm3
Radius of Gyration rxx: 7.35 cm
Radius of Gyration ryy: 4.94 cm
Torsional Constant (It): 1,943 cm4
Surface Area per Metre: 0.624 m2/m
Surface Area per Tonne: 21.7 m2/t

200x120x6.3 RHS

Designation: 200x120x6.3
Outside Depth (D): 200 mm
Outside Width (B): 120 mm
Wall Thickness (t): 6.3 mm
Mass per Metre: 29.9 kg/m
Cross-Sectional Area: 38 cm2
Second Moment of Area Ixx: 2,039 cm4
Second Moment of Area Iyy: 919 cm4
Elastic Modulus Zxx: 204 cm3
Elastic Modulus Zyy: 153 cm3
Plastic Modulus Sxx: 250 cm3
Plastic Modulus Syy: 175 cm3
Radius of Gyration rxx: 7.32 cm
Radius of Gyration ryy: 4.92 cm
Torsional Constant (It): 2,034 cm4
Surface Area per Metre: 0.619 m2/m
Surface Area per Tonne: 20.7 m2/t

200x120x8.0 RHS

Designation: 200x120x8.0
Outside Depth (D): 200 mm
Outside Width (B): 120 mm
Wall Thickness (t): 8 mm
Mass per Metre: 37.3 kg/m
Cross-Sectional Area: 47.6 cm2
Second Moment of Area Ixx: 2,490 cm4
Second Moment of Area Iyy: 1,114 cm4
Elastic Modulus Zxx: 249 cm3
Elastic Modulus Zyy: 186 cm3
Plastic Modulus Sxx: 309 cm3
Plastic Modulus Syy: 216 cm3
Radius of Gyration rxx: 7.23 cm
Radius of Gyration ryy: 4.84 cm
Torsional Constant (It): 2,501 cm4
Surface Area per Metre: 0.614 m2/m
Surface Area per Tonne: 16.5 m2/t

200x120x10.0 RHS

Designation: 200x120x10.0
Outside Depth (D): 200 mm
Outside Width (B): 120 mm
Wall Thickness (t): 10 mm
Mass per Metre: 45.9 kg/m
Cross-Sectional Area: 58.5 cm2
Second Moment of Area Ixx: 2,978 cm4
Second Moment of Area Iyy: 1,320 cm4
Elastic Modulus Zxx: 298 cm3
Elastic Modulus Zyy: 220 cm3
Plastic Modulus Sxx: 374 cm3
Plastic Modulus Syy: 260 cm3
Radius of Gyration rxx: 7.14 cm
Radius of Gyration ryy: 4.75 cm
Torsional Constant (It): 3,006 cm4
Surface Area per Metre: 0.609 m2/m
Surface Area per Tonne: 13.3 m2/t

200x120x12.0 RHS

Designation: 200x120x12.0
Outside Depth (D): 200 mm
Outside Width (B): 120 mm
Wall Thickness (t): 12 mm
Mass per Metre: 54.5 kg/m
Cross-Sectional Area: 69.4 cm2
Second Moment of Area Ixx: 3,459 cm4
Second Moment of Area Iyy: 1,515 cm4
Elastic Modulus Zxx: 346 cm3
Elastic Modulus Zyy: 253 cm3
Plastic Modulus Sxx: 439 cm3
Plastic Modulus Syy: 304 cm3
Radius of Gyration rxx: 7.06 cm
Radius of Gyration ryy: 4.67 cm
Torsional Constant (It): 3,462 cm4
Surface Area per Metre: 0.608 m2/m
Surface Area per Tonne: 11.1 m2/t

200x120x12.5 RHS

Designation: 200x120x12.5
Outside Depth (D): 200 mm
Outside Width (B): 120 mm
Wall Thickness (t): 12.5 mm
Mass per Metre: 55.7 kg/m
Cross-Sectional Area: 71 cm2
Second Moment of Area Ixx: 3,468 cm4
Second Moment of Area Iyy: 1,524 cm4
Elastic Modulus Zxx: 347 cm3
Elastic Modulus Zyy: 254 cm3
Plastic Modulus Sxx: 444 cm3
Plastic Modulus Syy: 308 cm3
Radius of Gyration rxx: 6.99 cm
Radius of Gyration ryy: 4.63 cm
Torsional Constant (It): 3,568 cm4
Surface Area per Metre: 0.599 m2/m
Surface Area per Tonne: 10.7 m2/t

200x120x14.2 RHS

Designation: 200x120x14.2
Outside Depth (D): 200 mm
Outside Width (B): 120 mm
Wall Thickness (t): 14.2 mm
Mass per Metre: 63.3 kg/m
Cross-Sectional Area: 80.7 cm2
Second Moment of Area Ixx: 3,910 cm4
Second Moment of Area Iyy: 1,690 cm4
Elastic Modulus Zxx: 391 cm3
Elastic Modulus Zyy: 282 cm3
Plastic Modulus Sxx: 503 cm3
Plastic Modulus Syy: 346 cm3
Radius of Gyration rxx: 6.96 cm
Radius of Gyration ryy: 4.58 cm
Torsional Constant (It): 3,920 cm4
Surface Area per Metre: 0.603 m2/m
Surface Area per Tonne: 9.5 m2/t

200x120 RHS — Overview

The 200x120 serial size group contains 8 sections, ranging from 63.3 kg/m to 24.1 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.