140x80 RHS — Sizes, Dimensions & Properties

6 sizes in the 140x80 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)
140x80x4.0	13.2	140	80	4	16.8	441	184
140x80x5.0	16.3	140	80	5	20.7	534	221
140x80x6.0	19.3	140	80	6	24.6	621	255
140x80x6.3	20.2	140	80	6.3	25.7	646	265
140x80x8.0	25.1	140	80	8	32	776	314
140x80x10.0	30.6	140	80	10	38.9	908	362

140x80x4.0 RHS

Designation: 140x80x4.0
Outside Depth (D): 140 mm
Outside Width (B): 80 mm
Wall Thickness (t): 4 mm
Mass per Metre: 13.2 kg/m
Cross-Sectional Area: 16.8 cm2
Second Moment of Area Ixx: 441 cm4
Second Moment of Area Iyy: 184 cm4
Elastic Modulus Zxx: 62.9 cm3
Elastic Modulus Zyy: 46 cm3
Plastic Modulus Sxx: 77.1 cm3
Plastic Modulus Syy: 52.2 cm3
Radius of Gyration rxx: 5.12 cm
Radius of Gyration ryy: 3.31 cm
Torsional Constant (It): 411 cm4
Surface Area per Metre: 0.43 m2/m
Surface Area per Tonne: 32.6 m2/t

140x80x5.0 RHS

Designation: 140x80x5.0
Outside Depth (D): 140 mm
Outside Width (B): 80 mm
Wall Thickness (t): 5 mm
Mass per Metre: 16.3 kg/m
Cross-Sectional Area: 20.7 cm2
Second Moment of Area Ixx: 534 cm4
Second Moment of Area Iyy: 221 cm4
Elastic Modulus Zxx: 76.3 cm3
Elastic Modulus Zyy: 55.3 cm3
Plastic Modulus Sxx: 94.3 cm3
Plastic Modulus Syy: 63.6 cm3
Radius of Gyration rxx: 5.08 cm
Radius of Gyration ryy: 3.27 cm
Torsional Constant (It): 499 cm4
Surface Area per Metre: 0.427 m2/m
Surface Area per Tonne: 26.2 m2/t

140x80x6.0 RHS

Designation: 140x80x6.0
Outside Depth (D): 140 mm
Outside Width (B): 80 mm
Wall Thickness (t): 6 mm
Mass per Metre: 19.3 kg/m
Cross-Sectional Area: 24.6 cm2
Second Moment of Area Ixx: 621 cm4
Second Moment of Area Iyy: 255 cm4
Elastic Modulus Zxx: 88.7 cm3
Elastic Modulus Zyy: 63.8 cm3
Plastic Modulus Sxx: 111 cm3
Plastic Modulus Syy: 74.4 cm3
Radius of Gyration rxx: 5.03 cm
Radius of Gyration ryy: 3.22 cm
Torsional Constant (It): 583 cm4
Surface Area per Metre: 0.425 m2/m
Surface Area per Tonne: 22 m2/t

140x80x6.3 RHS

Designation: 140x80x6.3
Outside Depth (D): 140 mm
Outside Width (B): 80 mm
Wall Thickness (t): 6.3 mm
Mass per Metre: 20.2 kg/m
Cross-Sectional Area: 25.7 cm2
Second Moment of Area Ixx: 646 cm4
Second Moment of Area Iyy: 265 cm4
Elastic Modulus Zxx: 92.3 cm3
Elastic Modulus Zyy: 66.2 cm3
Plastic Modulus Sxx: 115 cm3
Plastic Modulus Syy: 77.5 cm3
Radius of Gyration rxx: 5.01 cm
Radius of Gyration ryy: 3.21 cm
Torsional Constant (It): 607 cm4
Surface Area per Metre: 0.424 m2/m
Surface Area per Tonne: 21 m2/t

140x80x8.0 RHS

Designation: 140x80x8.0
Outside Depth (D): 140 mm
Outside Width (B): 80 mm
Wall Thickness (t): 8 mm
Mass per Metre: 25.1 kg/m
Cross-Sectional Area: 32 cm2
Second Moment of Area Ixx: 776 cm4
Second Moment of Area Iyy: 314 cm4
Elastic Modulus Zxx: 111 cm3
Elastic Modulus Zyy: 78.5 cm3
Plastic Modulus Sxx: 141 cm3
Plastic Modulus Syy: 94.1 cm3
Radius of Gyration rxx: 4.93 cm
Radius of Gyration ryy: 3.14 cm
Torsional Constant (It): 733 cm4
Surface Area per Metre: 0.419 m2/m
Surface Area per Tonne: 16.7 m2/t

140x80x10.0 RHS

Designation: 140x80x10.0
Outside Depth (D): 140 mm
Outside Width (B): 80 mm
Wall Thickness (t): 10 mm
Mass per Metre: 30.6 kg/m
Cross-Sectional Area: 38.9 cm2
Second Moment of Area Ixx: 908 cm4
Second Moment of Area Iyy: 362 cm4
Elastic Modulus Zxx: 130 cm3
Elastic Modulus Zyy: 90.5 cm3
Plastic Modulus Sxx: 168 cm3
Plastic Modulus Syy: 111 cm3
Radius of Gyration rxx: 4.83 cm
Radius of Gyration ryy: 3.05 cm
Torsional Constant (It): 862 cm4
Surface Area per Metre: 0.414 m2/m
Surface Area per Tonne: 13.5 m2/t

140x80 RHS — Overview

The 140x80 serial size group contains 6 sections, ranging from 30.6 kg/m to 13.2 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.