50x50 EA — Sizes, Dimensions & Properties

5 sizes in the 50x50 serial size group. All dimensions in mm, section properties in cm units.

Designation	Mass (kg/m)	Leg (mm)	t (mm)	A (cm2)	Ixx (cm4)	rxx (cm)	rv (cm)
50x50x3	2.33	50	3	2.96	6.86	1.52	0.986
50x50x4	3.06	50	4	3.89	8.97	1.52	0.979
50x50x5	3.77	50	5	4.8	11	1.51	0.973
50x50x6	4.47	50	6	5.69	12.8	1.5	0.968
50x50x8	5.82	50	8	7.41	16.3	1.48	0.963

50x50x3 EA

Designation: 50x50x3
Mass per Metre: 2.33 kg/m
Leg Length: 50 mm
Thickness (t): 3 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 2.96 cm2
Centroid Distance cx: 1.31 cm
Centroid Distance cy: 1.31 cm
Second Moment of Area Ixx: 6.86 cm4
Second Moment of Area Iyy: 6.86 cm4
Radius of Gyration rxx: 1.52 cm
Radius of Gyration ryy: 1.52 cm
Elastic Modulus Zxx: 1.86 cm3
Elastic Modulus Zyy: 1.86 cm3
Second Moment of Area Iu: 10.8 cm4
Second Moment of Area Iv: 2.88 cm4
Radius of Gyration ru: 1.91 cm
Radius of Gyration rv: 0.986 cm
tan(alpha): 1

50x50x4 EA

Designation: 50x50x4
Mass per Metre: 3.06 kg/m
Leg Length: 50 mm
Thickness (t): 4 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 3.89 cm2
Centroid Distance cx: 1.36 cm
Centroid Distance cy: 1.36 cm
Second Moment of Area Ixx: 8.97 cm4
Second Moment of Area Iyy: 8.97 cm4
Radius of Gyration rxx: 1.52 cm
Radius of Gyration ryy: 1.52 cm
Elastic Modulus Zxx: 2.46 cm3
Elastic Modulus Zyy: 2.46 cm3
Second Moment of Area Iu: 14.2 cm4
Second Moment of Area Iv: 3.73 cm4
Radius of Gyration ru: 1.91 cm
Radius of Gyration rv: 0.979 cm
tan(alpha): 1

50x50x5 EA

Designation: 50x50x5
Mass per Metre: 3.77 kg/m
Leg Length: 50 mm
Thickness (t): 5 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 4.8 cm2
Centroid Distance cx: 1.4 cm
Centroid Distance cy: 1.4 cm
Second Moment of Area Ixx: 11 cm4
Second Moment of Area Iyy: 11 cm4
Radius of Gyration rxx: 1.51 cm
Radius of Gyration ryy: 1.51 cm
Elastic Modulus Zxx: 3.05 cm3
Elastic Modulus Zyy: 3.05 cm3
Second Moment of Area Iu: 17.4 cm4
Second Moment of Area Iv: 4.55 cm4
Radius of Gyration ru: 1.9 cm
Radius of Gyration rv: 0.973 cm
tan(alpha): 1

50x50x6 EA

Designation: 50x50x6
Mass per Metre: 4.47 kg/m
Leg Length: 50 mm
Thickness (t): 6 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 5.69 cm2
Centroid Distance cx: 1.45 cm
Centroid Distance cy: 1.45 cm
Second Moment of Area Ixx: 12.8 cm4
Second Moment of Area Iyy: 12.8 cm4
Radius of Gyration rxx: 1.5 cm
Radius of Gyration ryy: 1.5 cm
Elastic Modulus Zxx: 3.61 cm3
Elastic Modulus Zyy: 3.61 cm3
Second Moment of Area Iu: 20.3 cm4
Second Moment of Area Iv: 5.34 cm4
Radius of Gyration ru: 1.89 cm
Radius of Gyration rv: 0.968 cm
tan(alpha): 1

50x50x8 EA

Designation: 50x50x8
Mass per Metre: 5.82 kg/m
Leg Length: 50 mm
Thickness (t): 8 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 7.41 cm2
Centroid Distance cx: 1.52 cm
Centroid Distance cy: 1.52 cm
Second Moment of Area Ixx: 16.3 cm4
Second Moment of Area Iyy: 16.3 cm4
Radius of Gyration rxx: 1.48 cm
Radius of Gyration ryy: 1.48 cm
Elastic Modulus Zxx: 4.68 cm3
Elastic Modulus Zyy: 4.68 cm3
Second Moment of Area Iu: 25.7 cm4
Second Moment of Area Iv: 6.88 cm4
Radius of Gyration ru: 1.86 cm
Radius of Gyration rv: 0.963 cm
tan(alpha): 1

50x50 EA — Overview

The 50x50 serial size group contains 5 sections, ranging from 5.82 kg/m to 2.33 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.