150x125 RHS — Sizes, Dimensions & Properties

6 sizes in the 150x125 serial size group. All dimensions in mm, section properties in cm units.

DesignationMass (kg/m)D (mm)B (mm)t (mm)A (cm2)Ixx (cm4)Iyy (cm4)
150x125x4.016.6150125421.2714539
150x125x5.020.6150125526.2870656
150x125x6.325.61501256.332.61,060798
150x125x8.032150125840.81,290966
150x125x10.039.21501251049.91,5301,140
150x125x12.547.715012512.560.81,7801,330

150x125x4.0 RHS

Designation
150x125x4.0
Outside Depth (D)
150 mm
Outside Width (B)
125 mm
Wall Thickness (t)
4 mm
Mass per Metre
16.6 kg/m
Cross-Sectional Area
21.2 cm2
Second Moment of Area Ixx
714 cm4
Second Moment of Area Iyy
539 cm4
Elastic Modulus Zxx
95.2 cm3
Elastic Modulus Zyy
86.3 cm3
Plastic Modulus Sxx
112 cm3
Plastic Modulus Syy
98.9 cm3
Radius of Gyration rxx
5.8 cm
Radius of Gyration ryy
5.04 cm
Torsional Constant (It)
949 cm4
Surface Area per Metre
0.54 m2/m
Surface Area per Tonne
32.5 m2/t

150x125x5.0 RHS

Designation
150x125x5.0
Outside Depth (D)
150 mm
Outside Width (B)
125 mm
Wall Thickness (t)
5 mm
Mass per Metre
20.6 kg/m
Cross-Sectional Area
26.2 cm2
Second Moment of Area Ixx
870 cm4
Second Moment of Area Iyy
656 cm4
Elastic Modulus Zxx
116 cm3
Elastic Modulus Zyy
105 cm3
Plastic Modulus Sxx
138 cm3
Plastic Modulus Syy
121 cm3
Radius of Gyration rxx
5.76 cm
Radius of Gyration ryy
5 cm
Torsional Constant (It)
1,160 cm4
Surface Area per Metre
0.537 m2/m
Surface Area per Tonne
26.1 m2/t

150x125x6.3 RHS

Designation
150x125x6.3
Outside Depth (D)
150 mm
Outside Width (B)
125 mm
Wall Thickness (t)
6.3 mm
Mass per Metre
25.6 kg/m
Cross-Sectional Area
32.6 cm2
Second Moment of Area Ixx
1,060 cm4
Second Moment of Area Iyy
798 cm4
Elastic Modulus Zxx
141 cm3
Elastic Modulus Zyy
128 cm3
Plastic Modulus Sxx
169 cm3
Plastic Modulus Syy
149 cm3
Radius of Gyration rxx
5.7 cm
Radius of Gyration ryy
4.94 cm
Torsional Constant (It)
1,430 cm4
Surface Area per Metre
0.534 m2/m
Surface Area per Tonne
20.9 m2/t

150x125x8.0 RHS

Designation
150x125x8.0
Outside Depth (D)
150 mm
Outside Width (B)
125 mm
Wall Thickness (t)
8 mm
Mass per Metre
32 kg/m
Cross-Sectional Area
40.8 cm2
Second Moment of Area Ixx
1,290 cm4
Second Moment of Area Iyy
966 cm4
Elastic Modulus Zxx
172 cm3
Elastic Modulus Zyy
155 cm3
Plastic Modulus Sxx
208 cm3
Plastic Modulus Syy
183 cm3
Radius of Gyration rxx
5.62 cm
Radius of Gyration ryy
4.87 cm
Torsional Constant (It)
1,750 cm4
Surface Area per Metre
0.529 m2/m
Surface Area per Tonne
16.5 m2/t

150x125x10.0 RHS

Designation
150x125x10.0
Outside Depth (D)
150 mm
Outside Width (B)
125 mm
Wall Thickness (t)
10 mm
Mass per Metre
39.2 kg/m
Cross-Sectional Area
49.9 cm2
Second Moment of Area Ixx
1,530 cm4
Second Moment of Area Iyy
1,140 cm4
Elastic Modulus Zxx
204 cm3
Elastic Modulus Zyy
183 cm3
Plastic Modulus Sxx
251 cm3
Plastic Modulus Syy
221 cm3
Radius of Gyration rxx
5.53 cm
Radius of Gyration ryy
4.78 cm
Torsional Constant (It)
2,100 cm4
Surface Area per Metre
0.524 m2/m
Surface Area per Tonne
13.4 m2/t

150x125x12.5 RHS

Designation
150x125x12.5
Outside Depth (D)
150 mm
Outside Width (B)
125 mm
Wall Thickness (t)
12.5 mm
Mass per Metre
47.7 kg/m
Cross-Sectional Area
60.8 cm2
Second Moment of Area Ixx
1,780 cm4
Second Moment of Area Iyy
1,330 cm4
Elastic Modulus Zxx
238 cm3
Elastic Modulus Zyy
212 cm3
Plastic Modulus Sxx
299 cm3
Plastic Modulus Syy
262 cm3
Radius of Gyration rxx
5.42 cm
Radius of Gyration ryy
4.67 cm
Torsional Constant (It)
2,490 cm4
Surface Area per Metre
0.518 m2/m
Surface Area per Tonne
10.9 m2/t

150x125 RHS — Overview

The 150x125 serial size group contains 6 sections, ranging from 47.7 kg/m to 16.6 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.

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