Unequal Angles - Back to Back (UA) - Section Properties Table

Dimensions and section properties for all 32 Unequal Angles - Back to Back (UA) to BS EN 10056-1 (SCI P363 Blue Book): combined section properties for back-to-back unequal 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
UA 200×150×18 BtB⁺	94.2	4750	6.29	5.84	348	120
UA 200×150×15 BtB	79.2	4040	6.33	5.77	294	101
UA 200×150×12 BtB	64	3300	6.36	5.72	238	81.6
UA 200×100×15 BtB	67.5	3520	6.4	3.45	274	86
UA 200×100×12 BtB	54.6	2880	6.43	3.39	222	69.6
UA 200×100×10 BtB	46	2440	6.46	3.35	186	58.4
UA 150×90×15 BtB	53.2	1522	4.74	3.32	155	67.8
UA 150×90×12 BtB	43.2	1250	4.77	3.27	127	55
UA 150×90×10 BtB	36.4	1070	4.8	3.23	107	46.4
UA 150×75×15 BtB	49.6	1430	4.75	2.65	150	63.4
UA 150×75×12 BtB	40.4	1180	4.78	2.59	123	51.4
UA 150×75×10 BtB	34	1000	4.81	2.56	103	43.4
UA 125×75×12 BtB	35.6	708	3.95	2.76	86.4	45.4
UA 125×75×10 BtB	30	604	3.97	2.72	73	38.2
UA 125×75×8 BtB	24.4	494	4	2.68	59.2	31
UA 100×75×12 BtB	30.8	378	3.1	2.95	56	39.4
UA 100×75×10 BtB	26	324	3.12	2.91	47.6	33.2
UA 100×75×8 BtB	21.2	266	3.14	2.87	38.6	27
UA 100×65×10 BtB⁺	24.6	308	3.14	2.43	46.4	31.2
UA 100×65×8 BtB⁺	19.9	254	3.16	2.39	37.8	25.4
UA 100×65×7 BtB⁺	17.5	226	3.17	2.37	33.2	22.4
UA 100×50×8 BtB	17.9	232	3.19	1.73	36.4	22.8
UA 100×50×6 BtB	13.7	180	3.21	1.69	27.6	17.4
UA 80×60×7 BtB	14.7	118	2.51	2.31	21.4	18.8
UA 80×40×8 BtB	14.1	115	2.53	1.41	22.8	18
UA 80×40×6 BtB	10.8	89.8	2.55	1.37	17.5	13.8
UA 75×50×8 BtB	14.8	104	2.35	1.9	20.8	18.8
UA 75×50×6 BtB	11.3	81	2.37	1.86	16	14.4
UA 70×50×6 BtB	10.8	66.8	2.2	1.9	14	13.8
UA 65×50×5 BtB	8.7	46.4	2.05	1.93	10.3	11.1
UA 60×40×6 BtB	8.92	40.2	1.88	1.51	10.1	11.4
UA 60×40×5 BtB	7.52	34.4	1.89	1.49	8.5	9.58

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

32 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

Equal Angles - Back to Back

33 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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