45x45 EA — Sizes, Dimensions & Properties

5 sizes in the 45x45 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)
45x45x3	2.09	45	3	2.66	4.93	1.36	0.882
45x45x4	2.74	45	4	3.49	6.43	1.36	0.876
45x45x4.5	3.06	45	4.5	3.9	7.15	1.35	0.873
45x45x5	3.38	45	5	4.3	7.84	1.35	0.871
45x45x6	4	45	6	5.09	9.16	1.34	0.867

45x45x3 EA

Designation: 45x45x3
Mass per Metre: 2.09 kg/m
Leg Length: 45 mm
Thickness (t): 3 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 2.66 cm2
Centroid Distance cx: 1.18 cm
Centroid Distance cy: 1.18 cm
Second Moment of Area Ixx: 4.93 cm4
Second Moment of Area Iyy: 4.93 cm4
Radius of Gyration rxx: 1.36 cm
Radius of Gyration ryy: 1.36 cm
Elastic Modulus Zxx: 1.49 cm3
Elastic Modulus Zyy: 1.49 cm3
Second Moment of Area Iu: 7.78 cm4
Second Moment of Area Iv: 2.07 cm4
Radius of Gyration ru: 1.71 cm
Radius of Gyration rv: 0.882 cm
tan(alpha): 1

45x45x4 EA

Designation: 45x45x4
Mass per Metre: 2.74 kg/m
Leg Length: 45 mm
Thickness (t): 4 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 3.49 cm2
Centroid Distance cx: 1.23 cm
Centroid Distance cy: 1.23 cm
Second Moment of Area Ixx: 6.43 cm4
Second Moment of Area Iyy: 6.43 cm4
Radius of Gyration rxx: 1.36 cm
Radius of Gyration ryy: 1.36 cm
Elastic Modulus Zxx: 1.97 cm3
Elastic Modulus Zyy: 1.97 cm3
Second Moment of Area Iu: 10.2 cm4
Second Moment of Area Iv: 2.68 cm4
Radius of Gyration ru: 1.71 cm
Radius of Gyration rv: 0.876 cm
tan(alpha): 1

45x45x4.5 EA

Designation: 45x45x4.5
Mass per Metre: 3.06 kg/m
Leg Length: 45 mm
Thickness (t): 4.5 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 3.9 cm2
Centroid Distance cx: 1.26 cm
Centroid Distance cy: 1.26 cm
Second Moment of Area Ixx: 7.15 cm4
Second Moment of Area Iyy: 7.15 cm4
Radius of Gyration rxx: 1.35 cm
Radius of Gyration ryy: 1.35 cm
Elastic Modulus Zxx: 2.2 cm3
Elastic Modulus Zyy: 2.2 cm3
Second Moment of Area Iu: 11.3 cm4
Second Moment of Area Iv: 2.97 cm4
Radius of Gyration ru: 1.7 cm
Radius of Gyration rv: 0.873 cm
tan(alpha): 1

45x45x5 EA

Designation: 45x45x5
Mass per Metre: 3.38 kg/m
Leg Length: 45 mm
Thickness (t): 5 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 4.3 cm2
Centroid Distance cx: 1.28 cm
Centroid Distance cy: 1.28 cm
Second Moment of Area Ixx: 7.84 cm4
Second Moment of Area Iyy: 7.84 cm4
Radius of Gyration rxx: 1.35 cm
Radius of Gyration ryy: 1.35 cm
Elastic Modulus Zxx: 2.43 cm3
Elastic Modulus Zyy: 2.43 cm3
Second Moment of Area Iu: 12.4 cm4
Second Moment of Area Iv: 3.26 cm4
Radius of Gyration ru: 1.7 cm
Radius of Gyration rv: 0.871 cm
tan(alpha): 1

45x45x6 EA

Designation: 45x45x6
Mass per Metre: 4 kg/m
Leg Length: 45 mm
Thickness (t): 6 mm
Root Radius (r): 7 mm
Toe Radius (r2): 3.5 mm
Cross-Sectional Area: 5.09 cm2
Centroid Distance cx: 1.32 cm
Centroid Distance cy: 1.32 cm
Second Moment of Area Ixx: 9.16 cm4
Second Moment of Area Iyy: 9.16 cm4
Radius of Gyration rxx: 1.34 cm
Radius of Gyration ryy: 1.34 cm
Elastic Modulus Zxx: 2.88 cm3
Elastic Modulus Zyy: 2.88 cm3
Second Moment of Area Iu: 14.5 cm4
Second Moment of Area Iv: 3.83 cm4
Radius of Gyration ru: 1.69 cm
Radius of Gyration rv: 0.867 cm
tan(alpha): 1

45x45 EA — Overview

The 45x45 serial size group contains 5 sections, ranging from 4 kg/m to 2.09 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.