160x80 RHS — Sizes, Dimensions & Properties

8 sizes in the 160x80 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)
160x80x4.0	14.4	160	80	4	18.4	612	207
160x80x5.0	17.8	160	80	5	22.7	744	249
160x80x6.0	21.2	160	80	6	27	868	288
160x80x6.3	22.2	160	80	6.3	28.2	903	299
160x80x8.0	27.6	160	80	8	35.2	1,091	356
160x80x10.0	33.7	160	80	10	42.9	1,284	411
160x80x12.0	39.5	160	80	12	50.3	1,449	455
160x80x12.5	40.9	160	80	12.5	52.1	1,485	465

160x80x4.0 RHS

Designation: 160x80x4.0
Outside Depth (D): 160 mm
Outside Width (B): 80 mm
Wall Thickness (t): 4 mm
Mass per Metre: 14.4 kg/m
Cross-Sectional Area: 18.4 cm2
Second Moment of Area Ixx: 612 cm4
Second Moment of Area Iyy: 207 cm4
Elastic Modulus Zxx: 76.5 cm3
Elastic Modulus Zyy: 51.7 cm3
Plastic Modulus Sxx: 94.7 cm3
Plastic Modulus Syy: 58.3 cm3
Radius of Gyration rxx: 5.77 cm
Radius of Gyration ryy: 3.35 cm
Torsional Constant (It): 493 cm4
Surface Area per Metre: 0.47 m2/m
Surface Area per Tonne: 32.6 m2/t

160x80x5.0 RHS

Designation: 160x80x5.0
Outside Depth (D): 160 mm
Outside Width (B): 80 mm
Wall Thickness (t): 5 mm
Mass per Metre: 17.8 kg/m
Cross-Sectional Area: 22.7 cm2
Second Moment of Area Ixx: 744 cm4
Second Moment of Area Iyy: 249 cm4
Elastic Modulus Zxx: 93 cm3
Elastic Modulus Zyy: 62.3 cm3
Plastic Modulus Sxx: 116 cm3
Plastic Modulus Syy: 71.1 cm3
Radius of Gyration rxx: 5.72 cm
Radius of Gyration ryy: 3.31 cm
Torsional Constant (It): 600 cm4
Surface Area per Metre: 0.467 m2/m
Surface Area per Tonne: 26.2 m2/t

160x80x6.0 RHS

Designation: 160x80x6.0
Outside Depth (D): 160 mm
Outside Width (B): 80 mm
Wall Thickness (t): 6 mm
Mass per Metre: 21.2 kg/m
Cross-Sectional Area: 27 cm2
Second Moment of Area Ixx: 868 cm4
Second Moment of Area Iyy: 288 cm4
Elastic Modulus Zxx: 108 cm3
Elastic Modulus Zyy: 72 cm3
Plastic Modulus Sxx: 136 cm3
Plastic Modulus Syy: 83.3 cm3
Radius of Gyration rxx: 5.67 cm
Radius of Gyration ryy: 3.27 cm
Torsional Constant (It): 701 cm4
Surface Area per Metre: 0.465 m2/m
Surface Area per Tonne: 21.9 m2/t

160x80x6.3 RHS

Designation: 160x80x6.3
Outside Depth (D): 160 mm
Outside Width (B): 80 mm
Wall Thickness (t): 6.3 mm
Mass per Metre: 22.2 kg/m
Cross-Sectional Area: 28.2 cm2
Second Moment of Area Ixx: 903 cm4
Second Moment of Area Iyy: 299 cm4
Elastic Modulus Zxx: 113 cm3
Elastic Modulus Zyy: 74.8 cm3
Plastic Modulus Sxx: 142 cm3
Plastic Modulus Syy: 86.8 cm3
Radius of Gyration rxx: 5.66 cm
Radius of Gyration ryy: 3.26 cm
Torsional Constant (It): 730 cm4
Surface Area per Metre: 0.464 m2/m
Surface Area per Tonne: 20.9 m2/t

160x80x8.0 RHS

Designation: 160x80x8.0
Outside Depth (D): 160 mm
Outside Width (B): 80 mm
Wall Thickness (t): 8 mm
Mass per Metre: 27.6 kg/m
Cross-Sectional Area: 35.2 cm2
Second Moment of Area Ixx: 1,091 cm4
Second Moment of Area Iyy: 356 cm4
Elastic Modulus Zxx: 136 cm3
Elastic Modulus Zyy: 89 cm3
Plastic Modulus Sxx: 175 cm3
Plastic Modulus Syy: 106 cm3
Radius of Gyration rxx: 5.57 cm
Radius of Gyration ryy: 3.18 cm
Torsional Constant (It): 883 cm4
Surface Area per Metre: 0.459 m2/m
Surface Area per Tonne: 16.6 m2/t

160x80x10.0 RHS

Designation: 160x80x10.0
Outside Depth (D): 160 mm
Outside Width (B): 80 mm
Wall Thickness (t): 10 mm
Mass per Metre: 33.7 kg/m
Cross-Sectional Area: 42.9 cm2
Second Moment of Area Ixx: 1,284 cm4
Second Moment of Area Iyy: 411 cm4
Elastic Modulus Zxx: 161 cm3
Elastic Modulus Zyy: 103 cm3
Plastic Modulus Sxx: 209 cm3
Plastic Modulus Syy: 125 cm3
Radius of Gyration rxx: 5.47 cm
Radius of Gyration ryy: 3.1 cm
Torsional Constant (It): 1,041 cm4
Surface Area per Metre: 0.454 m2/m
Surface Area per Tonne: 13.5 m2/t

160x80x12.0 RHS

Designation: 160x80x12.0
Outside Depth (D): 160 mm
Outside Width (B): 80 mm
Wall Thickness (t): 12 mm
Mass per Metre: 39.5 kg/m
Cross-Sectional Area: 50.3 cm2
Second Moment of Area Ixx: 1,449 cm4
Second Moment of Area Iyy: 455 cm4
Elastic Modulus Zxx: 181 cm3
Elastic Modulus Zyy: 114 cm3
Plastic Modulus Sxx: 240 cm3
Plastic Modulus Syy: 142 cm3
Radius of Gyration rxx: 5.37 cm
Radius of Gyration ryy: 3.01 cm
Torsional Constant (It): 1,175 cm4
Surface Area per Metre: 0.449 m2/m
Surface Area per Tonne: 11.4 m2/t

160x80x12.5 RHS

Designation: 160x80x12.5
Outside Depth (D): 160 mm
Outside Width (B): 80 mm
Wall Thickness (t): 12.5 mm
Mass per Metre: 40.9 kg/m
Cross-Sectional Area: 52.1 cm2
Second Moment of Area Ixx: 1,485 cm4
Second Moment of Area Iyy: 465 cm4
Elastic Modulus Zxx: 186 cm3
Elastic Modulus Zyy: 116 cm3
Plastic Modulus Sxx: 247 cm3
Plastic Modulus Syy: 146 cm3
Radius of Gyration rxx: 5.34 cm
Radius of Gyration ryy: 2.99 cm
Torsional Constant (It): 1,204 cm4
Surface Area per Metre: 0.448 m2/m
Surface Area per Tonne: 11 m2/t

160x80 RHS — Overview

The 160x80 serial size group contains 8 sections, ranging from 40.9 kg/m to 14.4 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.