Hollow Sections

Heading section

We are manufacturing and exporting Hollow Sections, Hollow Steel Sections and Hollow Section Tubes as per customer's requirement with anti rust oil coating from inside & outside of the tubes to ensure safe delivery to end customers.
We have developed our core competence in the manufacturing and supplying of high quality hollow sections that are engineered according to the specifications of our clients. Product innovation and quality control has helped us meet the ever expanding demands of the industry.
The use of steel tubular sections provides for strong, light and profitable structures and as a result offer a host of possibilities in terms of application (expressive capacity). The use of these products also facilitates designs with a greater aesthetic appeal.

Applications

  • Furniture industries
  • Domestic applications
  • bus body
  • fencing etc.

Their main advantages are as follows :

Design

  • Lighter and more diaphanous structures. Pieces of greater length with fewer joints.
  • Large spans. More transparent trusses and purlins with the possibility of eliminating transversal bracing.
  • More slender supports. Fewer sections, which can be reduced even more with the use of tubular sections filled with concrete.
  • Economical solution. Easily executed direct joints, shorter construction times and easy maintenance, are the results of a correct design and the guarantee of a competitive delivery date and price.
  • Expressive capacity. Circular, square, rectangular and elliptical sections, a range of wall thicknesses for every dimension of tubular section, absence of sharp edges,etc. These are the elements that provide innovating, wide ranging possibilities for architects and engineers.

Strength

  • Compression - For the same centered compression load and under the same conditions tubular sections allow for the use of longer elements than possible should open sections be used. If pillars are involved, a concrete fill permits to reduce further the amount of sections used.
  • Torsion - Their stiffness is the highest of all commercial steel sections. For this reason, their behaviour is unbeatable in the case of lateral bulging or warpage.
  • Bending - Due to the distribution of material on two axes, their behaviour in bending in two directions, is close to that of a beam and better than that of open sections.
  • Tensile - The use of welded joints throughout their extension means that the resistant section in the joints is used completely, unlike bolted joints or those with gusset plates.
  • Fatigue - The wide range of mechanical applications in which we can find steel tubular sections are eloquent proof of their perfect behaviour in these conditions.
  • Fluid-dynamic - Their low opposition to the thrust of fluids allows lighter sections to be used and makes them the perfect element in outdoor or underwater structures, such as posts, masts, towers, cranes, etc.

Safety

Protecting steel tubular sections by means of surface coating is easier and more economical than open sections due to the absence of cavities and the lower surface area to be covered.

Passive protection:

Structures made from Tubular Sections offer higher fire resistance than open sections due to a lower surface area exposed to fire in relation to mass(lower form factor/mass). Mixed structures based on tubular sections filled with concrete, show excellent behaviour in the presence of fire because of a delay due to the higher thermal inertia.

Active protection:

Filled with water, or when water flows through them due to the thermalsiphon effect, irrigated structures provide almost unlimited fire resistance. Maintenance of water circulation, with the replacement of any losses that might occur due to vaporisation, ensures that the structure is cooled in such a way that gradually the temperature stabilizes at values not very much higher than the water status change temperature and very much lower, therefore, than the critical temperature of steel. In addition to:

  • Introducing longer elements in structures.
  • Reducing the number of joints.
  • Eliminating struts.
  • Stiffeners and plate brackets, to reduce weight.
  • A concrete fill increases the surface area per floor.
  • Their shape facilitates maintenance and represents an economic solution.

Hollow Steel Section

Dimensions & Properties of Square Hollow Sections

SHS D x B mm Thickness t mm Sec Area A cm² Unit Wt w kg/m Moment of Inertia   Radius of Gyration   Elastic Modulus   Torsional Constants   Outer Surface
lxx cm4 lyy cm4 rxx cm ryy cm zxx cm³ zyy cm³ J cm4 B cm3 Area per m m²
25 x 25 1.6 1.43 1.12 1.28 1.28 0.94 0.94 1.02 1.02 1.96 1.46 0.092
2.0 1.74 1.36 1.48 1.48 0.92 0.92 1.19 1.19 2.29 1.68 0.090
2.6 2.16 1.69 1.72 1.72 0.89 0.89 1.38 1.38 2.68 1.92 0.087
3.2 2.53 1.98 1.89 1.89 0.86 0.86 1.51 1.51 2.96 2.07 0.084
32 x 32 2.0 2.30 1.80 3.36 3.36 1.21 1.21 2.10 2.10 5.30 3.05 0.118
2.6 2.88 2.26 4.02 4.02 1.18 1.18 2.51 2.51 6.45 3.63 0.115
3.2 3.42 2.69 4.54 4.54 1.15 1.15 2.84 2.84 7.41 4.07 0.112
38 x 38 2.0 2.78 2.18 5.88 5.88 1.46 1.46 3.10 3.10 9.31 4.54 0.142
2.6 3.51 2.75 7.14 7.14 1.43 1.43 3.76 3.76 11.51 5.49 0.139
3.2 4.19 3.29 8.18 8.18 1.40 1.40 4.30 4.30 13.45 6.28 0.136
4.0 5.03 3.95 9.26 9.26 1.36 1.36 4.87 4.87 15.67 7.12 0.131
40 x 40 2.6 3.72 2.92 8.45 8.45 1.51 1.51 4.22 4.22 13.63 6.20 0.147
2.9 4.09 3.21 9.11 9.11 1.49 1.49 4.56 4.56 14.85 6.68 0.145
3.2 4.45 3.49 9.72 9.72 1.48 1.48 4.86 4.86 16.00 7.12 0.144
4.0 5.35 4.20 11.07 11.07 1.44 1.44 5.54 5.54 18.75 8.12 0.139
50 x 5 2.6 4.76 3.74 17.47 17.47 1.92 1.92 6.99 6.99 28.53 10.37 0.187
2.9 5.25 4.12 18.99 18.99 1.90 1.90 7.60 7.60 31.15 11.23 0.185
3.6 6.35 4.98 22.15 22.15 1.87 1.87 8.86 8.86 36.58 12.98 0.181
4.5 7.67 6.02 25.50 25.50 1.82 1.82 10.20 10.20 41.99 14.68 0.177
60 x 60 2.6 5.80 4.55 31.33 31.33 2.33 2.33 10.44 10.44 50.08 15.52 0.227
2.9 6.41 5.03 34.21 34.21 2.31 2.31 11.40 11.40 56.12 16.95 0.225
3.2 7.01 5.50 36.94 36.94 2.30 12.31 12.31 60.02 18.31 0.224
4.0 8.55 6.71 43.55 43.55 2.26 2.26 14.52 14.52 72.41 21.62 0.219
4.8 10.01 7.85 49.22 49.22 2.22 2.22 16.41 16.41 83.86 24.51 0.215
72 x 72 3.2 8.54 6.71 66.32 66.32 2.79 2.79 18.42 18.42 106.81 27.47 0.272
4.0 10.47 8.22 79.03 79.03 2.75 2.75 21.95 21.95 129.85 32.78 0.267
4.8 12.31 9.66 90.31 90.31 2.71 2.71 25.09 25.09 151.55 37.55 0.263
80 x 80 3.2 9.57 7.51 92.71 92.71 3.11 3.11 23.18 23.18 148.55 34.60 0.304
4.0 11.75 9.22 111.04 111.04 3.07 3.07 27.76 27.76 181.22 41.49 0.299
4.8 13.85 10.87 127.58 127.58 3.04 3.04 31.89 31.89 212.26 47.77 0.295
91.5 x 91.5 3.6 12.32 9.67 156.49 156.49 3.56 3.56 34.21 34.21 251.17 51.14 0.347
4.5 15.14 11.88 187.57 187.57 3.52 3.52 41.00 41.00 306.78 61.40 0.343
5.4 17.85 14.01 215.68 215.68 3.48 3.48 47.14 47.14 359.76 70.77 0.338
113.5 x 113.5 4.8 20.28 15.92 393.30 393.30 4.40 4.40 69.30 69.30 637.45 103.89 0.429
5.4 22.60 17.74 432.58 432.58 4.38 4.38 76.23 76.23 708.69 114.41 0.426
132 x 132 4.8 23.83 18.71 634.39 634.39 5.16 5.16 96.12 96.12 1018.30 144.11 0.503
5.4 26.59 20.88 700.11 700.11 5.13 5.13 106.08 106.08 1134.25 159.18 0.500
150x150 4.0 22.95 18.01 807.82 807.82 5.93 5.93 107.71 107.71 1273.46 161.38 0.579
5.0 28.36 22.26 982.12 982.12 5.89 5.89 130.95 130.95 1569.09 196.38 0.574
6.0 33.63 26.40 1145.91 1145.91 5.84 5.84 152.79 152.79 1856.18 229.44 0.569
7.0 38.78 30.44 1299.44 1299.44 5.79 5.79 173.26 173.26 2134.99 260.65 0.564
8.0 43.79 34.38 1443.00 1443.00 5.74 5.74 192.40 192.40 2405.78 290.12 0.559
180 x 180 4.0 27.75 21.78 1421.74 1421.74 7.16 7.16 157.97 157.97 2224.31 236.76 0.699
5.0 34.36 26.97 1736.87 1736.87 7.11 7.11 192.99 192.99 2747.93 289.40 0.694
6.0 40.83 32.05 2036.52 2036.52 7.06 7.06 226.28 226.28 3259.23 339.65 0.689
7.0 47.18 37.03 2321.04 2321.04 7.01 7.01 257.89 257.89 3758.53 387.59 0.684
8.0 53.39 41.91 2590.73 2590.73 6.97 6.97 287.86 287.86 4246.16 433.32 0.679
220 x 220 4.0 34.15 26.61 2639.14 2639.14 8.79 8.79 239.92 239.92 4099.49 359.65 0.859
5.0 42.36 33.25 3238.02 3238.02 8.74 8.74 294.37 294.37 5076.22 441.43 0.854
6.0 50.43 39.59 3813.36 3813.36 8.70 8.70 346.67 346.67 6034.53 520.18 0.849
7.0 58.38 45.83 4365.55 4365.55 8.65 8.65 396.67 396.67 6974.82 596.00 0.844
8.0 66.19 51.96 4894.99 4894.99 8.60 8.60 445.00 445.00 7897.48 668.99 0.839
250 x 250 4.0 38.95 30.57 3907.30 3907.30 10.02 10.02 312.58 312.58 6045.40 468.61 0.979
5.0 48.36 37.96 4805.01 4805.01 9.97 9.97 384.40 384.40 7494.83 576.44 0.974
6.0 57.63 45.24 5672.00 5672.00 9.92 9.92 453.76 453.76 8920.44 680.77 0.969
7.0 66.78 52.42 6508.73 6508.73 9.87 9.87 520.70 520.70 10322.70 781.69 0.964
8.0 75.79 59.50 7315.65 7315.65 9.82 9.82 582.25 582.25 11702.07 879.31 0.959

Dimensions & Properties of Rectangular Hollow Sections

SHS (mm)
D X W mm
Thickness t mm c Area
A Cm2
Unit Wt w
(Kg/m)
Moment of Inertia Radius of Gyration Elastic Modulus Torsional Constants Outer Surface
(cm3)
lxx cm4 lyy cm4 rxx cm yyy cm zxx cm3 zyy cm3 J cm3 B cm3
50X25 2.0
2.6
3.2
4.0
2.74
3.46
4.13
4.95
2.15
271
3.24
3.88
8.38
10.16
11.63
13.13
2.81
3.36
3.80
4.23
1.75
1.71
1.68
1.63
1.01
0.99
0.96
0.92
3.35
4.06
4.65
5.25
2.25
2.69
3.04
3.38
6.79
8.27
9.52
10.86
3.79
4.53
5.52
5.69
0.142
0.139
0.134
0.13.
60X40 2.6
29
3.6
4.5
4.76
5.25
6.35
7.67
3.73
4.12
4.98
6.02
22.76
24.74
28.90
33.31
12.09
13.11
15.23
17.44
2.19
2.17
2.13
2.08
1.59
1.58
1.55
1.51
7.59
8.25
9.63
11.10
6.05
6.56
7.62
8.72
25.59
28.02
33.30
39.34
9.83
10.66
12.41
14.29
0.187
0.181
0.181
0.177
66X33 2.6
2.9
3.6
4.5
4.70
5.19
6.28
7.58
3.69
4.07
4.93
595
25.15
27.33
31.87
36.64
8.43
9.12
10.52
11.93
2.31
2.29
2.25
2.20
1.34
1.33
1.29
1.25
7.62
8.28
9.66
11.10
5.11
533
6.37
7.23
20.75
22.65
26.71
31.21
8.71
9.43
10.90
12.43
0.185
0.183
0.179
0.175
80X40 2.6
2.9
3.2
4.0
48
5.80
6.41
7.01
8.55
10.01
4.55
5.03
5.50
6.71
7.85
46.58
50.87
54.94
64.79
73.22
15.74
17.11
18.41
21.49
24.03
2.84
2.82
2.80
2.75
2.71
1.65
1.63
1.62
1.59
1.55
11.55
12.72
13.74
16.20
18.30
7.87
8.56
9.21
10.74
12.02
38.50
42.23
45.83
54.77
62.81
13.46
14.66
15.78
18.49
20.79
0.227
0.225
0.224
0.219
0.215
96 x 46 3.2
3.8
4.0
8.54
10.47
12.31
6.71
8.22
9.66
98.61
117.54
134.35
33.28
39.32
44.55
3.40
3.35
3.30
1.97
1.94
1.90
20.54
24.49
27.99
13.67
16.38
18.56
82.13
99.11
114.80
23.82
28.24
32.14
0.272
2.67
2.63
122 x 61 3.6
4.5
5.4
12.32
15.14
17.85
9.67
11.88
14.01
232.61
278.94
320.83
78.83
93.78
107.03
4.34
4.29
4.24
253
2.49
2.45
38.13
45.73
52.60
25.84
30.75
35.09
193.91
235.39
274.29
44.50
53.13
60.89
0.347
0.343
0.338
120 x 60 3.2
3.6
4.5
10.85
12.11
14.87
8.51
9.5
11.67
199.88
220.75
264.52
67.65
74.77
88.88
4.29
4.27
4.22
2.50
2.48
2.44
33.31
36.79
44.09
22.65
24.92
29.63
165.83
184.10
223.34
38.95
42.91
51.19
0.344
0.341
0.337
145 x 82 4.8
5.4
20.28
22.60
15.92
17.74
555.16
610.85
228.50
250.59
5.23
5.20
3.36
3.33
76.57
84.26
55.73
61.12
534.27
292.70
94.45
103.81
0.429
0.426
172 x 92 4.8
5.4
23.83
26.59
18.71
20.88
917.13
1012.47
346.91
381.74
6.20
6.17
3.82
3.79
106.64
117.73
75.41
82.99
826.04
592.70
128.85
142..4
0.503
0.500
200 x 100 4.0
5.0
6.0
7.0
8.0
22.95
28.95
33.63
38.78
43.79
18.01
22.26
26.40
30.44
34.38
1199..71
1759.25
1703.31
1932..19
2146.21
410.78
496.94
576.91
650.93
719.19
7.23
7.17
1.12
7.06
7.00
4.23
4.19
4.14
4.10
4.05
119.97
119.97
170.33
193.22
214.62
82.16
99.39
115.38
130.19
143.84
991.47
1216.96
1434.03
1642.92
1843.86
141.46
171.53
199.68
226.04
2.5.68
0.579
0.574
0.569
0.564
0.559
220 x 140
or
240 x 120
4.0
5.0
6.0
7.0
27.75
34.36
40.83
47.18
21.78
26.97
32.05
37.03
1892.55
2313.36
2713.97
3094.76
947.64
1155.23
1351.66
1537.22
8.26
8.21
8.15
8.10
5.84
580
5.75
5.71
172.05
210.31
246.72
281.34
135.38
165.03
193.09
219.60
2000.01
2467.63
2922.95
3366.29
223.99
273.47
320.55
365.35
0.699
0.694
0.689
0.684
300 x 200 4.0
5.0
6.0
7.0
8.0
38.95
48.36
57.63
66.78
75.79
30.57
37.96
45.24
52.42
59.50
5072.88
6241.05
7370.23
8460.93
9513.66
2736.56
3360.92
3962.19
4540.76
5097.04
11.41
11.36
11.31
11.26
11.20
8.38
8.34
8.29
8.25
8.20
338.19
416.07
791.35
564.06
634.24
273.66
336.09
396.22
454.08
509.70
555.71
6882.77
8186.002
9465.89
10722.83
448.64
551.49
650.85
746.83
839.51
0.979
0.974
0.969
0.964
0.959
Technical Specifications
Relevant Code : IS:4923
Dimensional Tolerance
Length: 6.0m ± 0.05m
Customized Length ranging from 4m to 10m may be supplied.
Thickness: For All size ± 10%
Outer Dimensions ± 1% with a minimum fo ± 0.5 mm
Corner Squareness 900 ± 20
Weight: On individual length: ± 10%, -8%.
On lots of 10.0 tons ± 7.5%
Straightness: Minimum 1 : 100th of any length measured along the centre line (mill straightness condition)
unless otherwise specifically arranged.
Twist Tolerance Maximum 2 mm ± 0.5 mm / m length - measured relative vertical shift of any adjacent corner of the section, measured by keeping one side on flat surface.
End Finish Plain ended - Mechanically sheared, mill-cut finish without further machining.
Raw material Prime Hot - Rolled Coils from top Primary Steel Producers such as SAIL.
Making "HI TECH SQUARECT" along with relevant BIS standard embossed at regular intervals on each pipe.
NOTE HI TECH Structure Rectangular & Square Steel Hollow Section in customized size, grade, lemgth, surface finish add end finish may be delivered as per agreed supply conditions.
STEEL GRADE
1. YST - 210 MPA
2. YST - 240 MPA
3. YST - 275 MPA
4. YST - 310 MPA
SURFACE FINISH
1. BARE with Oiling/Vanishing
2. BARE without Oiling
3. PICKLED and OILED.
4. HOT - DIPPED GALVANISED (Coating of 500 gms, per sq. mtr)