90x90 EA — Sizes, Dimensions & Properties

6 sizes in the 90x90 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)
90x90x6	8.3	90	6	10.6	80.3	2.76	1.78
90x90x7	9.61	90	7	12.2	92.5	2.75	1.77
90x90x8	10.9	90	8	13.9	104	2.74	1.76
90x90x9	12.2	90	9	15.5	116	2.73	1.76
90x90x10	13.4	90	10	17.1	127	2.72	1.75
90x90x12	15.9	90	12	20.3	148	2.7	1.74

90x90x6 EA

Designation: 90x90x6
Mass per Metre: 8.3 kg/m
Leg Length: 90 mm
Thickness (t): 6 mm
Root Radius (r): 11 mm
Toe Radius (r2): 5.5 mm
Cross-Sectional Area: 10.6 cm2
Centroid Distance cx: 2.41 cm
Centroid Distance cy: 2.41 cm
Second Moment of Area Ixx: 80.3 cm4
Second Moment of Area Iyy: 80.3 cm4
Radius of Gyration rxx: 2.76 cm
Radius of Gyration ryy: 2.76 cm
Elastic Modulus Zxx: 12.2 cm3
Elastic Modulus Zyy: 12.2 cm3
Second Moment of Area Iu: 127 cm4
Second Moment of Area Iv: 33.3 cm4
Radius of Gyration ru: 3.47 cm
Radius of Gyration rv: 1.78 cm
tan(alpha): 1

90x90x7 EA

Designation: 90x90x7
Mass per Metre: 9.61 kg/m
Leg Length: 90 mm
Thickness (t): 7 mm
Root Radius (r): 11 mm
Toe Radius (r2): 5.5 mm
Cross-Sectional Area: 12.2 cm2
Centroid Distance cx: 2.45 cm
Centroid Distance cy: 2.45 cm
Second Moment of Area Ixx: 92.5 cm4
Second Moment of Area Iyy: 92.5 cm4
Radius of Gyration rxx: 2.75 cm
Radius of Gyration ryy: 2.75 cm
Elastic Modulus Zxx: 14.1 cm3
Elastic Modulus Zyy: 14.1 cm3
Second Moment of Area Iu: 147 cm4
Second Moment of Area Iv: 38.3 cm4
Radius of Gyration ru: 3.46 cm
Radius of Gyration rv: 1.77 cm
tan(alpha): 1

90x90x8 EA

Designation: 90x90x8
Mass per Metre: 10.9 kg/m
Leg Length: 90 mm
Thickness (t): 8 mm
Root Radius (r): 11 mm
Toe Radius (r2): 5.5 mm
Cross-Sectional Area: 13.9 cm2
Centroid Distance cx: 2.5 cm
Centroid Distance cy: 2.5 cm
Second Moment of Area Ixx: 104 cm4
Second Moment of Area Iyy: 104 cm4
Radius of Gyration rxx: 2.74 cm
Radius of Gyration ryy: 2.74 cm
Elastic Modulus Zxx: 16.1 cm3
Elastic Modulus Zyy: 16.1 cm3
Second Moment of Area Iu: 166 cm4
Second Moment of Area Iv: 43.1 cm4
Radius of Gyration ru: 3.45 cm
Radius of Gyration rv: 1.76 cm
tan(alpha): 1

90x90x9 EA

Designation: 90x90x9
Mass per Metre: 12.2 kg/m
Leg Length: 90 mm
Thickness (t): 9 mm
Root Radius (r): 11 mm
Toe Radius (r2): 5.5 mm
Cross-Sectional Area: 15.5 cm2
Centroid Distance cx: 2.54 cm
Centroid Distance cy: 2.54 cm
Second Moment of Area Ixx: 116 cm4
Second Moment of Area Iyy: 116 cm4
Radius of Gyration rxx: 2.73 cm
Radius of Gyration ryy: 2.73 cm
Elastic Modulus Zxx: 17.9 cm3
Elastic Modulus Zyy: 17.9 cm3
Second Moment of Area Iu: 184 cm4
Second Moment of Area Iv: 47.9 cm4
Radius of Gyration ru: 3.44 cm
Radius of Gyration rv: 1.76 cm
tan(alpha): 1

90x90x10 EA

Designation: 90x90x10
Mass per Metre: 13.4 kg/m
Leg Length: 90 mm
Thickness (t): 10 mm
Root Radius (r): 11 mm
Toe Radius (r2): 5.5 mm
Cross-Sectional Area: 17.1 cm2
Centroid Distance cx: 2.58 cm
Centroid Distance cy: 2.58 cm
Second Moment of Area Ixx: 127 cm4
Second Moment of Area Iyy: 127 cm4
Radius of Gyration rxx: 2.72 cm
Radius of Gyration ryy: 2.72 cm
Elastic Modulus Zxx: 19.8 cm3
Elastic Modulus Zyy: 19.8 cm3
Second Moment of Area Iu: 201 cm4
Second Moment of Area Iv: 52.6 cm4
Radius of Gyration ru: 3.43 cm
Radius of Gyration rv: 1.75 cm
tan(alpha): 1

90x90x12 EA

Designation: 90x90x12
Mass per Metre: 15.9 kg/m
Leg Length: 90 mm
Thickness (t): 12 mm
Root Radius (r): 11 mm
Toe Radius (r2): 5.5 mm
Cross-Sectional Area: 20.3 cm2
Centroid Distance cx: 2.66 cm
Centroid Distance cy: 2.66 cm
Second Moment of Area Ixx: 148 cm4
Second Moment of Area Iyy: 148 cm4
Radius of Gyration rxx: 2.7 cm
Radius of Gyration ryy: 2.7 cm
Elastic Modulus Zxx: 23.3 cm3
Elastic Modulus Zyy: 23.3 cm3
Second Moment of Area Iu: 234 cm4
Second Moment of Area Iv: 61.7 cm4
Radius of Gyration ru: 3.4 cm
Radius of Gyration rv: 1.74 cm
tan(alpha): 1

90x90 EA — Overview

The 90x90 serial size group contains 6 sections, ranging from 15.9 kg/m to 8.3 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.