The Civil Sutras

Steel Tubes for Structural Purposes as per IS-1161

Dimensions Details

Nominal Bore (mm)	Outside Diameter (mm)	Class (mm)	Thickness (mm)	Weight (kg/m)
15	21.3	Light	2.0	0.947
15	21.3	Medium	2.6	1.21
15	21.3	Heavy	3.2	1.44
20	26.9	Light	2.3	1.38
20	26.9	Medium	2.6	1.56
20	26.9	Heavy	3.2	1.87
25	33.7	Light	2.6	1.98
25	33.7	Medium	3.2	2.41
25	33.7	Heavy	4.0	2.93
32	42.4	Light	2.6	2.54
32	42.4	Medium	3.2	3.10
32	42.4	Heavy	4.0	3.79
40	48.3	Light	2.9	3.23
40	48.3	Medium	3.2	3.56
40	48.3	Heavy	4.0	4.37
50	60.3	Light	2.9	4.08
50	60.3	Medium	3.6	5.03
50	60.3	Heavy	4.5	6.19
65	76.1	Light	3.2	5.71
65	76.1	Medium	3.6	6.42
65	76.1	Heavy	4.5	7.93
80	88.9	Light	3.2	6.72
80	88.9	Medium	4.0	8.36
80	88.9	Heavy	4.8	9.90
90	101.6	Light	3.6	8.70
90	101.6	Medium	4.0	9.63
90	101.6	Heavy	4.8	11.50
100	114.3	Light	3.6	9.75
100	114.3	Medium	4.5	12.20
100	114.3	Heavy	5.4	14.50
110	127.0	Light	4.5	13.60
110	127.0	Medium	4.8	14.50
110	127.0	Heavy	5.4	16.20
125	139.7	Light	4.5	15.00
125	139.7	Medium	4.8	15.90
125	139.7	Heavy	5.4	17.90
135	152.4	Light	4.5	16.40
135	152.4	Medium	4.8	17.50
135	152.4	Heavy	5.4	19.60
150	165.1	Light	4.5	17.80
150	165.1	Medium	4.8	18.90
150	165.1	Heavy	5.4	21.30
150	168.3	Light	4.5	18.20
150	168.3	Medium	4.8	19.40
150	168.3	Heavy 1	5.4	21.70
150	168.3	Heavy 2	6.3	25.20
175	193.7	Light	4.8	22.40
175	193.7	Medium	5.4	25.10
175	193.7	Heavy	5.9	27.30
200	219.1	Light	4.8	25.40
200	219.1	Medium	5.6	29.50
200	219.1	Heavy	5.9	31.00
225	244.5	Heavy	5.9	34.70
250	273.0	Heavy	5.9	38.90
300	323.9	Heavy	6.3	49.30
350	355.6	Heavy	8.0	68.60
Nominal Bore (mm)	Outside Diameter (mm)	Class (mm)	Thickness (mm)	Weight (kg/m)

Nominal Bore (mm)	Area of Cross Section (mm2)	Internal Volume (mm3)	External Surface (mm2)	Internal Surface (mm2)
15	1.2	235	669	543
15	1.5	203	669	506
15	1.8	174	669	468
20	1.8	390	845	700
20	2.0	370	845	681
20	2.4	330	845	644
25	2.5	638	1059	895
25	3.1	585	1059	857
25	3.7	518	1059	807
32	3.3	1086	1332	1168
32	3.9	1017	1332	1130
32	4.8	929	1332	1080
40	4.1	1418	1517	1335
40	4.5	1378	1517	1316
40	5.6	1275	1517	1265
50	5.2	2332	–	1711
50	6.4	2213	–	1667
50	7.9	2066	–	1611
65	7.3	3814	2391	2189
65	8.2	3727	2391	2163
65	10.1	3534	2391	2107
80	8.6	5343	2793	2591
80	10.7	5138	2793	2540
80	12.7	4936	2793	2490
90	11.1	6995	3192	2964
90	12.3	6877	3192	2939
90	14.6	6644	3192	2889
100	12.5	9004	3591	3363
100	15.5	8704	3591	3306
100	18.5	8409	3591	3250
110	17.3	10930	3990	3705
110	18.4	10819	3990	3686
110	20.6	10599	3990	3649
125	19.1	13410	4389	4104
125	20.3	13287	4389	4085
125	22.8	13043	4389	4047
135	20.9	16142	4788	4503
135	22.2	16008	4788	4484
135	25.0	15740	4788	4446
150	22.7	19128	5187	4902
150	24.2	18981	5187	4883
150	27.1	18690	5187	4845
150	23.1	19921	5287	5002
150	24.7	19771	5287	4983
150	27.6	19473	5287	4946
150	32.0	19030	5287	4889
175	28.5	26606	6085	5781
175	32.0	26260	6085	5743
175	34.8	25974	6085	5712
200	32.3	34454	6883	6578
200	37.5	33930	6883	6528
200	39.5	33734	6883	6509
225	44.2	42507	7681	7307
250	49.5	53557	8578	8202
300	62.8	76073	10177	9775
350	87.3	90553	11173	10663
Nominal Bore (mm)	Area of Cross Section (mm2)	Internal Volume (mm3)	External Surface (mm2)	Internal Surface (mm2)

Sectional Properties

Nominal Bore (mm)	Moment of Inertia (cm4)	Modulus of Section (cm3)	Radius of Gyration (cm)	Square of Radius of Gyration (cm2)
15	0.57	0.54	0.69	0.47
15	0.69	0.64	0.66	0.44
15	0.75	0.70	0.55	0.42
20	1.36	1.01	0.87	0.76
20	1.48	1.10	0.86	0.74
20	1.70	1.26	0.84	0.71
25	3.09	1.83	1.10	1.21
25	3.61	2.14	1.08	1.17
25	4.19	2.48	1.05	1.11
32	6.47	3.05	1.41	1.98
32	7.62	3.59	1.39	1.93
32	8.99	4.24	1.36	1.86
40	10.70	4.43	1.61	2.59
40	11.59	4.80	1.59	2.54
40	13.77	5.70	1.57	2.47
50	21.59	7.16	2.03	4.13
50	25.88	8.58	2.00	4.02
50	30.90	10.20	1.98	3.92
65	48.79	12.82	2.58	6.66
65	54.02	14.20	2.57	6.60
65	65.12	17.10	2.54	6.43
80	79.23	17.82	3.03	9.19
80	96.36	21.68	3.00	9.00
80	112.52	25.31	2.98	8.88
90	133.27	26.23	3.47	12.03
90	146.32	28.80	3.45	11.91
90	171.44	33.75	3.43	11.76
100	192.03	33.60	3.92	15.36
100	234.30	41.00	3.89	15.10
100	274.50	48.00	3.85	14.86
110	325.30	51.20	4.33	18.78
110	344.58	54.27	4.32	18.69
110	382.00	60.20	4.30	18.52
125	437.20	62.60	4.78	22.87
125	463.44	66.35	4.77	22.76
125	514.50	73.70	4.75	22.58
135	572.20	75.10	5.23	27.37
135	606.92	79.65	5.22	27.25
135	674.50	88.50	5.20	27.05
150	732.60	88.70	5.68	32.27
150	777.32	94.16	5.67	32.14
150	864.70	105.00	5.65	31.92
150	777.20	92.40	5.79	33.56
150	824.78	98.01	5.78	33.42
150	917.70	109.00	5.76	33.21
150	1053.00	125.00	5.73	32.85
175	1271.71	131.31	6.68	44.63
175	1417.00	146.00	6.66	44.36
175	1535.20	158.65	6.64	41.11
200	1856.51	169.47	7.58	57.45
200	2141.00	195.00	7.55	57.02
200	2247.00	205.00	7.54	56.86
225	3149.00	258.00	8.44	71.21
250	4412.00	323.00	9.45	89.30
300	7992.00	493.00	11.20	125.44
350	13111.00	737.00	12.30	151.29
Nominal Bore (mm)	Moment of Inertia (cm4)	Modulus of Section (cm3)	Radius of Gyration (cm)	Square of Radius of Gyration (cm2)