AISC Pipe (Round HSS) - Section Properties

Section dimensions and properties for AISC Pipe (Round HSS).

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Designation	mass lb/ft	h in	b in	t in	A in²	I_y in⁴	W_el,y in³	W_pl,y in³	i_y in	I_z in⁴	W_el,z in³	W_pl,z in³	i_z in	I_t in⁴
Pipe26STD	103	26	26	0.349	28.2	2320	178	230	9.07	2320	178	230	9.07	4640
Pipe24STD	94.7	24	24	0.349	26	1820	152	196	8.36	1820	152	196	8.36	3640
Pipe20STD	78.7	20	20	0.349	21.6	1040	104	135	6.95	1040	104	135	6.95	2090
Pipe18STD	70.7	18	18	0.349	19.4	756	84	109	6.24	756	84	109	6.24	1510
Pipe16STD	62.6	16	16	0.349	17.2	527	65.9	85.7	5.53	527	65.9	85.7	5.53	1050
Pipe14STD	54.6	14	14	0.349	15	350	50	65.2	4.83	350	50	65.2	4.83	700
Pipe12STD	49.6	12.75	12.75	0.349	13.7	262	41	53.7	4.39	262	41	53.7	4.39	523
Pipe10STD	40.5	10.75	10.75	0.34	11.5	151	28.1	36.9	3.68	151	28.1	36.9	3.68	302
Pipe8STD	28.6	8.625	8.625	0.3	7.85	68.1	15.8	20.8	2.95	68.1	15.8	20.8	2.95	136
Pipe6STD	19	6.625	6.625	0.261	5.2	26.5	7.99	10.6	2.25	26.5	7.99	10.6	2.25	52.9
Pipe5STD	14.6	5.563	5.563	0.241	4.01	14.3	5.14	6.83	1.88	14.3	5.14	6.83	1.88	28.6
Pipe4STD	10.8	4.5	4.5	0.221	2.96	6.82	3.03	4.05	1.51	6.82	3.03	4.05	1.51	13.6
Pipe3-1/2STD	9.12	4	4	0.211	2.5	4.52	2.26	3.03	1.34	4.52	2.26	3.03	1.34	9.04
Pipe3STD	7.58	3.5	3.5	0.201	2.07	2.85	1.63	2.19	1.17	2.85	1.63	2.19	1.17	5.69
Pipe2-1/2STD	5.8	2.875	2.875	0.189	1.61	1.45	1.01	1.37	0.952	1.45	1.01	1.37	0.952	2.89
Pipe2STD	3.66	2.375	2.375	0.143	1.02	0.627	0.528	0.713	0.791	0.627	0.528	0.713	0.791	1.25
Pipe1-1/2STD	2.72	1.9	1.9	0.135	0.749	0.293	0.309	0.421	0.626	0.293	0.309	0.421	0.626	0.586
Pipe1-1/4STD	2.27	1.66	1.66	0.13	0.625	0.184	0.222	0.305	0.543	0.184	0.222	0.305	0.543	0.368
Pipe1STD	1.68	1.315	1.315	0.124	0.469	0.083	0.126	0.177	0.423	0.083	0.126	0.177	0.423	0.166
Pipe3/4STD	1.13	1.05	1.05	0.105	0.312	0.035	0.0671	0.0942	0.336	0.035	0.0671	0.0942	0.336	0.07
Pipe1/2STD	0.85	0.84	0.84	0.101	0.234	0.016	0.0388	0.0555	0.264	0.016	0.0388	0.0555	0.264	0.032
Pipe26XS	136	26	26	0.465	36.1	2950	227	294	9.03	2950	227	294	9.03	5900
Pipe24XS	126	24	24	0.465	33.3	2310	192	250	8.33	2310	192	250	8.33	4620
Pipe20XS	104	20	20	0.465	27.6	1320	132	172	6.91	1320	132	172	6.91	2640
Pipe18XS	93.5	18	18	0.465	24.8	956	106	139	6.21	956	106	139	6.21	1910
Pipe16XS	82.9	16	16	0.465	22	665	83.1	109	5.5	665	83.1	109	5.5	1330
Pipe14XS	72.2	14	14	0.465	19.2	440	62.9	82.7	4.79	440	62.9	82.7	4.79	880
Pipe12XS	65.5	12.75	12.75	0.465	17.5	339	53.2	70.2	4.35	339	53.2	70.2	4.35	678
Pipe10XS	54.8	10.75	10.75	0.465	15.1	199	37	49.2	3.64	199	37	49.2	3.64	398
Pipe8XS	43.4	8.625	8.625	0.465	11.9	100	23.1	31	2.89	100	23.1	31	2.89	199
Pipe6XS	28.6	6.625	6.625	0.403	7.83	38.3	11.6	15.6	2.2	38.3	11.6	15.6	2.2	76.6
Pipe5XS	20.8	5.563	5.563	0.349	5.73	19.5	7.02	9.5	1.85	19.5	7.02	9.5	1.85	39
Pipe4XS	15	4.5	4.5	0.315	4.14	9.12	4.05	5.53	1.48	9.12	4.05	5.53	1.48	18.2
Pipe3-1/2XS	12.5	4	4	0.296	3.43	5.94	2.97	4.07	1.31	5.94	2.97	4.07	1.31	11.9
Pipe3XS	10.3	3.5	3.5	0.28	2.83	3.7	2.11	2.91	1.14	3.7	2.11	2.91	1.14	7.4
Pipe2-1/2XS	7.67	2.875	2.875	0.257	2.1	1.83	1.27	1.77	0.93	1.83	1.27	1.77	0.93	3.66
Pipe2XS	5.03	2.375	2.375	0.204	1.4	0.827	0.696	0.964	0.771	0.827	0.696	0.964	0.771	1.65
Pipe1-1/2XS	3.63	1.9	1.9	0.186	1	0.372	0.392	0.549	0.61	0.372	0.392	0.549	0.61	0.744
Pipe1-1/4XS	3	1.66	1.66	0.178	0.837	0.231	0.278	0.393	0.528	0.231	0.278	0.393	0.528	0.462
Pipe1XS	2.17	1.315	1.315	0.166	0.602	0.101	0.154	0.221	0.41	0.101	0.154	0.221	0.41	0.202
Pipe3/4XS	1.48	1.05	1.05	0.143	0.407	0.043	0.0818	0.119	0.325	0.043	0.0818	0.119	0.325	0.086
Pipe1/2XS	1.09	0.84	0.84	0.137	0.303	0.019	0.0462	0.0686	0.253	0.019	0.0462	0.0686	0.253	0.038
Pipe12XXS	126	12.75	12.75	0.93	35.4	625	97.6	134	4.2	625	97.6	134	4.2	1250
Pipe10XXS	104	10.75	10.75	0.93	28.8	354	65.6	90.9	3.51	354	65.6	90.9	3.51	709
Pipe8XXS	72.5	8.625	8.625	0.816	20	154	35.8	49.9	2.78	154	35.8	49.9	2.78	308
Pipe6XXS	53.2	6.625	6.625	0.805	14.7	63.5	19.2	27.4	2.08	63.5	19.2	27.4	2.08	127
Pipe5XXS	38.6	5.563	5.563	0.699	10.7	32.2	11.6	16.7	1.74	32.2	11.6	16.7	1.74	64.4
Pipe4XXS	27.6	4.5	4.5	0.628	7.66	14.7	6.53	9.5	1.39	14.7	6.53	9.5	1.39	29.4
Pipe3XXS	18.6	3.5	3.5	0.559	5.17	5.79	3.31	4.89	1.06	5.79	3.31	4.89	1.06	11.6
Pipe2-1/2XXS	13.7	2.875	2.875	0.514	3.83	2.78	1.94	2.91	0.854	2.78	1.94	2.91	0.854	5.56
Pipe2XXS	9.04	2.375	2.375	0.406	2.51	1.27	1.07	1.6	0.711	1.27	1.07	1.6	0.711	2.54

51 sections · source: AISC Shapes Database v16.0

Related section types

AISC HSS (Hollow Structural Sections)

714 sections · AISC Shapes Database v16.0

Learn more

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

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