300x150 RHS — Sizes, Dimensions & Properties

5 sizes in the 300x150 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)
300x150x8.0	54	300	150	8	68.8	8,010	2,700
300x150x10.0	66.7	300	150	10	84.9	9,720	3,250
300x150x12.5	82.1	300	150	12.5	105	11,700	3,860
300x150x14.2	92.3	300	150	14.2	118	12,900	4,230
300x150x16.0	103	300	150	16	131	14,200	4,600

300x150x8.0 RHS

Designation: 300x150x8.0
Outside Depth (D): 300 mm
Outside Width (B): 150 mm
Wall Thickness (t): 8 mm
Mass per Metre: 54 kg/m
Cross-Sectional Area: 68.8 cm2
Second Moment of Area Ixx: 8,010 cm4
Second Moment of Area Iyy: 2,700 cm4
Elastic Modulus Zxx: 534 cm3
Elastic Modulus Zyy: 360 cm3
Plastic Modulus Sxx: 663 cm3
Plastic Modulus Syy: 407 cm3
Radius of Gyration rxx: 10.8 cm
Radius of Gyration ryy: 6.27 cm
Torsional Constant (It): 6,450 cm4
Surface Area per Metre: 0.879 m2/m
Surface Area per Tonne: 16.3 m2/t

300x150x10.0 RHS

Designation: 300x150x10.0
Outside Depth (D): 300 mm
Outside Width (B): 150 mm
Wall Thickness (t): 10 mm
Mass per Metre: 66.7 kg/m
Cross-Sectional Area: 84.9 cm2
Second Moment of Area Ixx: 9,720 cm4
Second Moment of Area Iyy: 3,250 cm4
Elastic Modulus Zxx: 648 cm3
Elastic Modulus Zyy: 433 cm3
Plastic Modulus Sxx: 811 cm3
Plastic Modulus Syy: 496 cm3
Radius of Gyration rxx: 10.7 cm
Radius of Gyration ryy: 6.18 cm
Torsional Constant (It): 7,840 cm4
Surface Area per Metre: 0.874 m2/m
Surface Area per Tonne: 13.1 m2/t

300x150x12.5 RHS

Designation: 300x150x12.5
Outside Depth (D): 300 mm
Outside Width (B): 150 mm
Wall Thickness (t): 12.5 mm
Mass per Metre: 82.1 kg/m
Cross-Sectional Area: 105 cm2
Second Moment of Area Ixx: 11,700 cm4
Second Moment of Area Iyy: 3,860 cm4
Elastic Modulus Zxx: 779 cm3
Elastic Modulus Zyy: 514 cm3
Plastic Modulus Sxx: 986 cm3
Plastic Modulus Syy: 600 cm3
Radius of Gyration rxx: 10.6 cm
Radius of Gyration ryy: 6.07 cm
Torsional Constant (It): 9,450 cm4
Surface Area per Metre: 0.868 m2/m
Surface Area per Tonne: 10.6 m2/t

300x150x14.2 RHS

Designation: 300x150x14.2
Outside Depth (D): 300 mm
Outside Width (B): 150 mm
Wall Thickness (t): 14.2 mm
Mass per Metre: 92.3 kg/m
Cross-Sectional Area: 118 cm2
Second Moment of Area Ixx: 12,900 cm4
Second Moment of Area Iyy: 4,230 cm4
Elastic Modulus Zxx: 862 cm3
Elastic Modulus Zyy: 564 cm3
Plastic Modulus Sxx: 1,100 cm3
Plastic Modulus Syy: 666 cm3
Radius of Gyration rxx: 10.5 cm
Radius of Gyration ryy: 6 cm
Torsional Constant (It): 10,500 cm4
Surface Area per Metre: 0.863 m2/m
Surface Area per Tonne: 9.4 m2/t

300x150x16.0 RHS

Designation: 300x150x16.0
Outside Depth (D): 300 mm
Outside Width (B): 150 mm
Wall Thickness (t): 16 mm
Mass per Metre: 103 kg/m
Cross-Sectional Area: 131 cm2
Second Moment of Area Ixx: 14,200 cm4
Second Moment of Area Iyy: 4,600 cm4
Elastic Modulus Zxx: 944 cm3
Elastic Modulus Zyy: 613 cm3
Plastic Modulus Sxx: 1,210 cm3
Plastic Modulus Syy: 732 cm3
Radius of Gyration rxx: 10.4 cm
Radius of Gyration ryy: 5.92 cm
Torsional Constant (It): 11,500 cm4
Surface Area per Metre: 0.859 m2/m
Surface Area per Tonne: 8.3 m2/t

300x150 RHS — Overview

The 300x150 serial size group contains 5 sections, ranging from 103 kg/m to 54 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.