300x200 RHS — Sizes, Dimensions & Properties

9 sizes in the 300x200 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)
300x200x5.0	38.3	300	200	5	48.7	6,322	3,396
300x200x6.0	45.7	300	200	6	58.2	7,486	4,013
300x200x6.3	47.9	300	200	6.3	61	7,829	4,193
300x200x8.0	60.3	300	200	8	76.8	9,717	5,184
300x200x10.0	74.5	300	200	10	94.9	11,819	6,278
300x200x12.0	88.5	300	200	12	113	13,797	7,294
300x200x12.5	91.9	300	200	12.5	117	14,273	7,537
300x200x14.2	103	300	200	14.2	132	15,800	8,330
300x200x16.0	115	300	200	16	147	17,390	9,109

300x200x5.0 RHS

Designation: 300x200x5.0
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 5 mm
Mass per Metre: 38.3 kg/m
Cross-Sectional Area: 48.7 cm2
Second Moment of Area Ixx: 6,322 cm4
Second Moment of Area Iyy: 3,396 cm4
Elastic Modulus Zxx: 421 cm3
Elastic Modulus Zyy: 340 cm3
Plastic Modulus Sxx: 501 cm3
Plastic Modulus Syy: 380 cm3
Radius of Gyration rxx: 11.4 cm
Radius of Gyration ryy: 8.35 cm
Torsional Constant (It): 6,824 cm4
Surface Area per Metre: 0.987 m2/m
Surface Area per Tonne: 25.8 m2/t

300x200x6.0 RHS

Designation: 300x200x6.0
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 6 mm
Mass per Metre: 45.7 kg/m
Cross-Sectional Area: 58.2 cm2
Second Moment of Area Ixx: 7,486 cm4
Second Moment of Area Iyy: 4,013 cm4
Elastic Modulus Zxx: 499 cm3
Elastic Modulus Zyy: 401 cm3
Plastic Modulus Sxx: 596 cm3
Plastic Modulus Syy: 451 cm3
Radius of Gyration rxx: 11.3 cm
Radius of Gyration ryy: 8.31 cm
Torsional Constant (It): 8,100 cm4
Surface Area per Metre: 0.985 m2/m
Surface Area per Tonne: 21.5 m2/t

300x200x6.3 RHS

Designation: 300x200x6.3
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 6.3 mm
Mass per Metre: 47.9 kg/m
Cross-Sectional Area: 61 cm2
Second Moment of Area Ixx: 7,829 cm4
Second Moment of Area Iyy: 4,193 cm4
Elastic Modulus Zxx: 522 cm3
Elastic Modulus Zyy: 419 cm3
Plastic Modulus Sxx: 624 cm3
Plastic Modulus Syy: 472 cm3
Radius of Gyration rxx: 11.3 cm
Radius of Gyration ryy: 8.29 cm
Torsional Constant (It): 8,476 cm4
Surface Area per Metre: 0.984 m2/m
Surface Area per Tonne: 20.5 m2/t

300x200x8.0 RHS

Designation: 300x200x8.0
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 8 mm
Mass per Metre: 60.3 kg/m
Cross-Sectional Area: 76.8 cm2
Second Moment of Area Ixx: 9,717 cm4
Second Moment of Area Iyy: 5,184 cm4
Elastic Modulus Zxx: 648 cm3
Elastic Modulus Zyy: 518 cm3
Plastic Modulus Sxx: 779 cm3
Plastic Modulus Syy: 589 cm3
Radius of Gyration rxx: 11.3 cm
Radius of Gyration ryy: 8.22 cm
Torsional Constant (It): 10,562 cm4
Surface Area per Metre: 0.979 m2/m
Surface Area per Tonne: 16.2 m2/t

300x200x10.0 RHS

Designation: 300x200x10.0
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 10 mm
Mass per Metre: 74.5 kg/m
Cross-Sectional Area: 94.9 cm2
Second Moment of Area Ixx: 11,819 cm4
Second Moment of Area Iyy: 6,278 cm4
Elastic Modulus Zxx: 788 cm3
Elastic Modulus Zyy: 628 cm3
Plastic Modulus Sxx: 956 cm3
Plastic Modulus Syy: 721 cm3
Radius of Gyration rxx: 11.2 cm
Radius of Gyration ryy: 8.13 cm
Torsional Constant (It): 12,908 cm4
Surface Area per Metre: 0.974 m2/m
Surface Area per Tonne: 13.1 m2/t

300x200x12.0 RHS

Designation: 300x200x12.0
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 12 mm
Mass per Metre: 88.5 kg/m
Cross-Sectional Area: 113 cm2
Second Moment of Area Ixx: 13,797 cm4
Second Moment of Area Iyy: 7,294 cm4
Elastic Modulus Zxx: 920 cm3
Elastic Modulus Zyy: 729 cm3
Plastic Modulus Sxx: 1,124 cm3
Plastic Modulus Syy: 847 cm3
Radius of Gyration rxx: 11.1 cm
Radius of Gyration ryy: 8.05 cm
Torsional Constant (It): 15,137 cm4
Surface Area per Metre: 0.969 m2/m
Surface Area per Tonne: 10.9 m2/t

300x200x12.5 RHS

Designation: 300x200x12.5
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 12.5 mm
Mass per Metre: 91.9 kg/m
Cross-Sectional Area: 117 cm2
Second Moment of Area Ixx: 14,273 cm4
Second Moment of Area Iyy: 7,537 cm4
Elastic Modulus Zxx: 952 cm3
Elastic Modulus Zyy: 754 cm3
Plastic Modulus Sxx: 1,165 cm3
Plastic Modulus Syy: 877 cm3
Radius of Gyration rxx: 11 cm
Radius of Gyration ryy: 8.02 cm
Torsional Constant (It): 15,677 cm4
Surface Area per Metre: 0.968 m2/m
Surface Area per Tonne: 10.5 m2/t

300x200x14.2 RHS

Designation: 300x200x14.2
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 14.2 mm
Mass per Metre: 103 kg/m
Cross-Sectional Area: 132 cm2
Second Moment of Area Ixx: 15,800 cm4
Second Moment of Area Iyy: 8,330 cm4
Elastic Modulus Zxx: 1,060 cm3
Elastic Modulus Zyy: 833 cm3
Plastic Modulus Sxx: 1,300 cm3
Plastic Modulus Syy: 978 cm3
Radius of Gyration rxx: 11 cm
Radius of Gyration ryy: 7.95 cm
Torsional Constant (It): 17,500 cm4
Surface Area per Metre: 0.963 m2/m
Surface Area per Tonne: 9.4 m2/t

300x200x16.0 RHS

Designation: 300x200x16.0
Outside Depth (D): 300 mm
Outside Width (B): 200 mm
Wall Thickness (t): 16 mm
Mass per Metre: 115 kg/m
Cross-Sectional Area: 147 cm2
Second Moment of Area Ixx: 17,390 cm4
Second Moment of Area Iyy: 9,109 cm4
Elastic Modulus Zxx: 1,159 cm3
Elastic Modulus Zyy: 911 cm3
Plastic Modulus Sxx: 1,441 cm3
Plastic Modulus Syy: 1,080 cm3
Radius of Gyration rxx: 10.9 cm
Radius of Gyration ryy: 7.87 cm
Torsional Constant (It): 19,252 cm4
Surface Area per Metre: 0.959 m2/m
Surface Area per Tonne: 8.3 m2/t

300x200 RHS — Overview

The 300x200 serial size group contains 9 sections, ranging from 115 kg/m to 38.3 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.