RSA Steel Angle: Sizes and Weight

RSA (Rolled Steel Angle) is an L-shaped structural steel section available in equal and unequal leg configurations. RSA steel angle sizes and weight data are standardized per EN 10056 (European) and AISC (American). The designation indicates leg dimensions and thickness, for example RSA 100x100x10 means 100 mm legs with 10 mm thickness.

When RSA Steel Angles Are Used

RSA angles serve as bracing members, connections, lintels, and secondary structural elements across construction, petrochemical, and industrial applications. Equal angles are selected when loads act symmetrically along both axes. Unequal angles are used where asymmetric loading or specific geometric constraints apply, such as shelf angles on masonry facades or stiffeners on pipe racks.

RSA Equal Angle Sizes and Weights

Size (mm)	Thickness (mm)	Weight (kg/m)	Area (cm2)
25 x 25	3	1.12	1.42
30 x 30	3	1.36	1.74
40 x 40	4	2.42	3.08
45 x 45	5	3.38	4.30
50 x 50	5	3.77	4.80
60 x 60	6	5.42	6.91
70 x 70	7	7.38	9.40
80 x 80	8	9.63	12.3
90 x 90	9	12.2	15.5
100 x 100	10	15.0	19.2
120 x 120	12	21.6	27.5
150 x 150	15	33.8	43.0
200 x 200	18	54.2	69.1

RSA Unequal Angle Sizes and Weights

Size (mm)	Thickness (mm)	Weight (kg/m)	Area (cm2)
40 x 20	4	1.77	2.26
50 x 30	5	2.96	3.78
60 x 40	5	3.76	4.79
65 x 50	5	4.35	5.54
75 x 50	6	5.65	7.19
80 x 60	7	7.36	9.38
100 x 65	8	9.94	12.7
100 x 75	9	11.8	15.1
120 x 80	10	15.0	19.1
150 x 90	12	21.6	27.5
150 x 100	12	22.7	28.9
200 x 100	14	31.6	40.3

Dimensions per EN 10056-1. Weights are nominal values for hot-rolled sections.

Pro Tip

When ordering RSA angles, always specify the material grade (S275 or S355 per EN 10025) along with the dimensions. For outdoor or corrosive environments, request hot-dip galvanized finish per EN ISO 1461, which adds approximately 5-8% to the nominal weight.

RSA angles are frequently combined with UPN channels in bracing systems and with HSS hollow sections for truss construction in industrial facilities.

Read the full guide to RSA steel structural angles