Equal Angles - Back to Back (EA) - Section Properties Table

Dimensions and section properties for all 33 Equal Angles - Back to Back (EA) to BS EN 10056-1 (SCI P363 Blue Book): combined section properties for back-to-back equal angles. Use the table below for reference, or open the interactive tool to run EC3 capacity checks.

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Designation	mass kg/m	I_y cm⁴	i_y cm	i_z cm	W_el,y cm³	A cm²
EA 200×200×24 BtB	142	6660	6.06	8.42	470	181
EA 200×200×20 BtB	120	5700	6.11	8.34	398	153
EA 200×200×18 BtB	109	5200	6.13	8.31	362	138
EA 200×200×16 BtB	97	4680	6.16	8.27	324	124
EA 150×150×18 BtB⁺	80.2	2120	4.55	6.32	200	102
EA 150×150×15 BtB	67.6	1800	4.57	6.24	167	86
EA 150×150×12 BtB	54.6	1470	4.6	6.18	135	69.6
EA 150×150×10 BtB	46	1250	4.62	6.13	114	58.6
EA 120×120×15 BtB⁺	53.2	896	3.63	5.06	106	68
EA 120×120×12 BtB	43.2	736	3.65	4.99	85.4	55
EA 120×120×10 BtB	36.4	626	3.67	4.94	72	46.4
EA 120×120×8 BtB⁺	29.4	518	3.71	4.93	59	37.6
EA 100×100×15 BtB⁺	43.8	500	2.99	4.25	71.6	56
EA 100×100×12 BtB	35.6	414	3.02	4.19	58.2	45.4
EA 100×100×10 BtB	30	354	3.04	4.14	49.2	38.4
EA 100×100×8 BtB	24.4	290	3.06	4.11	39.8	31
EA 90×90×12 BtB⁺	31.8	298	2.71	3.8	47	40.6
EA 90×90×10 BtB	26.8	254	2.72	3.75	39.6	34.2
EA 90×90×8 BtB	21.8	208	2.74	3.71	32.2	27.8
EA 90×90×7 BtB	19.2	185	2.75	3.69	28.2	24.4
EA 80×80×10 BtB	23.8	175	2.41	3.36	30.8	30.2
EA 80×80×8 BtB	19.3	144	2.43	3.31	25.2	24.6
EA 75×75×8 BtB	18	118	2.27	3.12	22	22.8
EA 75×75×6 BtB	13.7	91.6	2.29	3.07	16.8	17.5
EA 70×70×7 BtB	14.8	84.6	2.12	2.89	16.8	18.8
EA 70×70×6 BtB	12.8	73.8	2.13	2.87	14.5	16.3
EA 65×65×7 BtB	13.7	66.8	1.96	2.83	14.4	17.5
EA 60×60×8 BtB	14.2	58.4	1.8	2.52	13.8	18.1
EA 60×60×6 BtB	10.8	45.6	1.82	2.48	10.6	13.8
EA 60×60×5 BtB	9.14	38.8	1.82	2.45	8.9	11.6
EA 50×50×6 BtB	8.94	25.6	1.5	2.09	7.22	11.4
EA 50×50×5 BtB	7.54	22	1.51	2.06	6.1	9.6
EA 50×50×4 BtB	6.12	17.9	1.52	2.04	4.92	7.78

⁺ in addition to the range of BS 4 sections. ^# check availability.

33 sections · source: BS EN 1993-1-1:2005 / BS EN 10056-1:1999

Related section types

Equal Angles (EA)

42 sections · BS EN 1993-1-1:2005 / BS EN 10056-1:1999

Unequal Angles (UA)

39 sections · BS EN 1993-1-1:2005 / BS EN 10056-1:1999

Unequal Angles - Back to Back

32 sections · BS EN 1993-1-1:2005 / BS EN 10056-1:1999

Learn more

📘 How to read a steel section table (UB, UC, IPE, HE) →📘 Section modulus explained: elastic (Wel) vs plastic (Wpl) →

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