25x25 EA — Sizes, Dimensions & Properties

3 sizes in the 25x25 serial size group. All dimensions in mm, section properties in cm units.

DesignationMass (kg/m)Leg (mm)t (mm)A (cm2)Ixx (cm4)rxx (cm)rv (cm)
25x25x31.122531.420.8030.7510.484
25x25x41.452541.851.020.7410.482
25x25x51.782552.261.210.7310.481

25x25x3 EA

Designation
25x25x3
Mass per Metre
1.12 kg/m
Leg Length
25 mm
Thickness (t)
3 mm
Root Radius (r)
3.5 mm
Toe Radius (r2)
1.75 mm
Cross-Sectional Area
1.42 cm2
Centroid Distance cx
0.723 cm
Centroid Distance cy
0.723 cm
Second Moment of Area Ixx
0.803 cm4
Second Moment of Area Iyy
0.803 cm4
Radius of Gyration rxx
0.751 cm
Radius of Gyration ryy
0.751 cm
Elastic Modulus Zxx
0.452 cm3
Elastic Modulus Zyy
0.452 cm3
Second Moment of Area Iu
1.27 cm4
Second Moment of Area Iv
0.334 cm4
Radius of Gyration ru
0.945 cm
Radius of Gyration rv
0.484 cm
tan(alpha)
1

25x25x4 EA

Designation
25x25x4
Mass per Metre
1.45 kg/m
Leg Length
25 mm
Thickness (t)
4 mm
Root Radius (r)
3.5 mm
Toe Radius (r2)
1.75 mm
Cross-Sectional Area
1.85 cm2
Centroid Distance cx
0.762 cm
Centroid Distance cy
0.762 cm
Second Moment of Area Ixx
1.02 cm4
Second Moment of Area Iyy
1.02 cm4
Radius of Gyration rxx
0.741 cm
Radius of Gyration ryy
0.741 cm
Elastic Modulus Zxx
0.586 cm3
Elastic Modulus Zyy
0.586 cm3
Second Moment of Area Iu
1.61 cm4
Second Moment of Area Iv
0.43 cm4
Radius of Gyration ru
0.931 cm
Radius of Gyration rv
0.482 cm
tan(alpha)
1

25x25x5 EA

Designation
25x25x5
Mass per Metre
1.78 kg/m
Leg Length
25 mm
Thickness (t)
5 mm
Root Radius (r)
3.5 mm
Toe Radius (r2)
1.75 mm
Cross-Sectional Area
2.26 cm2
Centroid Distance cx
0.799 cm
Centroid Distance cy
0.799 cm
Second Moment of Area Ixx
1.21 cm4
Second Moment of Area Iyy
1.21 cm4
Radius of Gyration rxx
0.731 cm
Radius of Gyration ryy
0.731 cm
Elastic Modulus Zxx
0.711 cm3
Elastic Modulus Zyy
0.711 cm3
Second Moment of Area Iu
1.9 cm4
Second Moment of Area Iv
0.524 cm4
Radius of Gyration ru
0.915 cm
Radius of Gyration rv
0.481 cm
tan(alpha)
1

25x25 EA — Overview

The 25x25 serial size group contains 3 sections, ranging from 1.78 kg/m to 1.12 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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