Square Hollow Section (SHS) - for balanced strength, symmetry and aesthetics

SHS , an "equal-sided" symmetry possess the inherent flat surfaces for better connectivity. When a balance is required between strength and functionality, SHS are commonly used in many structural and mechanical applications.

Properties of Closed Structurals (Square Hollow Sections)

ISI- 4923 YST 310 Grade

SHS Thick
ness
Sec Area Unit Wt Moment of
Inertia
Radius of Gyration Elastic Modules Torsional Constants Outer Surface
D X B t A w 1xx 1yy rxx rxx Zxx Zyy J B Area per m
mm mm cm2 kg/m cm4 cm4 cm cm cm3 cm3 cm4 cm3 m2
25x25 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 1.68
2.6 2.16 1.69 1.72 1.72 0.89 0.89 1.38 1.38 2.68 1.92 1.92
3.2 2.53 1.98 1.89 1.89 0.86 0.86 1.51 1.51 2.96 2.07 2.07
32x32 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 3.42 4.54 4.54 1.15 1.15 2.84 2.84 7.41 4.07 0.112
38x38 2.0 2.78 2.18 5.88 5.88 1.46 1.46 3.10 3.10 9.31 4.94 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
40x40 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 11.7 11.7 1.44 1.44 5.54 5.54 18.75 8.12 0.139
49.5x49.5 2.6 4.70 3.69 16.91 16.91 1.90 1.90 6.83 6.83 27.19 10.11 0.185
2.9 5.19 4.07 18.37 18.37 1.88 1.88 7.42 7.42 29.81 10.98 0.183
3.6 6.28 4.93 21.42 21.42 1.85 1.85 8.66 8.66 35.54 12.81 0.179
4.5 7.58 5.95 24.64 24.64 1.80 1.80 9.96 9.96 42.15 14.79 0.175
60x60 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 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
72x72 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
91.5x91.5 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
113.5x113.5 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
132x132 4.8 23.83 16.71 634.39 634.39 5.16 5.16 96.12 96.12 1018.30 144.11 0.503
5.4 26.59 20.88 432.58 432.58 5.13 5.13 106.08 106.08 1134.25 159.18 0.500
180x180 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
220x220* 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
250x250* 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

Slenderness Ratio Vs Allowable Axial Stress (in MPa) in Compression

Specification

Slenderness Ratio
( 1 eff/r )
Steel Grade Slenderness Ratio
(1 eff/r )
Steel Grade Slenderness Ratio
(1 eff/r | )
Steel Grade
Yst 240 Yst 310 Yst 240 Yst 310 Yst 240 Yst 310
10 144 186 100 79 87 190 30 31
20 142 183 110 71 77 200 28 28
30 140 178 120 63 67 210 25 26
40 134 169 130 56 60 220 23 23
50 127 157 140 50 53 230 21 22
60 118 143 150 45 47 240 20 20
70 109 128 160 41 42 250 18 18
80 98 113 170 37 38 300 13 13
90 88 99 180 33 34 350 10 10
1 eff = Effective length considering lateral restraint , r = Radius of Gyration of the section (in same unit of 1 eff

Other Allowable Stress values ( in MPa)

Steel Grade Minimum Yeild Stress Minimum UTS Axial Stress in Tension Bending Stress in Ten. or Compn. Shear Stress Bearing Stress Equivalent Stress
Yst 240 240 410 144 158 108 180 216
Yst 310 310 450 186 205 140 232 279

General Technical Specifications and Tolerances

Length: 6.0m ± 50mm customized length ranging from 4m to 1m may be supplied
Thikness: for all sizes: ± 10.0%
Outer Dimensions: ± 1% with a minimum of ± 0.5mm
Corner Squareness: 90° ± 2°
Corner Radii: Maximum, 3 x (thikness of the section)
Weight: On individual length: + 10% ,On lots of 10 MT : ± 7.5%
Twist Tolerance: Maximum 2 mm +0.5mm/m length - the 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
Surface Finish: Black without any surface treatment of oiling or varnishing
Weld Ability: RHS / SHS are weld able with standard M.S electrode without any preheating
Note: RHS/SHS in customized size, grade, length, surface finish and end finish may be delivered as per agreed supply condition.

Applications

Furniture industries & domestic applications, Automatic Chasis, Cabins, Bus stands, Milk Booths, Scaffoldings, Cranes, Material Storage Racks, Furniture partition frame work., Pallets, Guard Rails, Staircases, Hand railings, fencing poles Hydraulic Platforms, Truck & Bus body Members Trusses, Columns & Purlins, Trolleys etc

Rectangular Hollow Sections (RHS) - for strength and economy.

RHS have also become very popular in many forms of construction and other structural & mechanical applications. This has been greatly assisted by the section's inherent flat surfaces making it more economical for joining and other fabrication processes. Minimal edge preparation is required for joining and welding RHS.

Properties of Closed Structurals (RHS) ISI- 4923 YST 310 Grade

RHS Thickness Sec Area Unit Wt Moment of Inertia Radius of Gyration Elastic Modules Torsional Constants Outer Surface
D X B t A w 1xx 1yy rxx ryy Zxx Zyy J B Area per m
mm mm cm2 kg/m cm4 cm4 cm cm cm3 cm3 cm4 cm3 m2
50x25 2.0 2.74 2.15 8.38 2.81 1.75 1.01 3.35 2.25 6.79 3.79 0.142
2.6 3.46 2.71 10.16 3.36 1.71 0.99 4.06 2.69 8.27 4.53 0.137
3.2 4.13 3.24 11.63 3.80 1.68 0.96 4.65 3.04 9.52 5.12 0.134
4.0 4.95 3.88 13.13 4.23 1.63 0.92 5.25 3.38 10.86 5.69 0.129
60x40 2.6 4.76 3.73 22.76 12.09 2.19 1.59 7.59 6.05 25.59 9.83 0.187
2.9 5.25 4.12 24.74 13.11 2.17 1.58 8.25 6.56 28.02 10.66 0.185
3.6 6.35 4.98 28.90 15.23 2.13 1.55 9.63 7.62 33.30 12.41 0.181
4.5 7.67 6.02 33.31 17.44 2.08 1.51 11.10 8.72 39.34 14.29 0.177
66x33 2.6 4.70 3.69 25.15 8.43 2.31 1.34 7.62 5.11 20.75 8.71 0.185
2.9 5.19 4.07 27.33 9.12 2.29 1.33 8.28 5.53 22.65 9.43 0.183
3.6 6.28 4.93 31.87 10.52 2.25 1.29 9.66 6.37 26.71 10.90 0.179
4.5 7.58 5.95 36.64 11.93 2.20 1.25 11.10 7.23 31.21 12.43 0.175
80x40 2.6 5.80 4.55 46.58 15.74 2.84 1.65 11.65 7.87 38.50 13.46 0.227
2.9 6.41 5.03 50.87 17.11 2.82 1.63 12.72 8.56 42.23 14.66 0.225
3.2 7.01 5.50 54.94 18.41 2.80 1.62 13.74 9.21 45.83 15.78 0.224
4.0 8.55 6.71 64.79 21.49 2.75 1.59 16.20 10.74 54.77 18.49 0.219
4.8 10.01 7.85 73.22 24.03 2.71 1.55 18.30 12.02 62.81 20.79 0.215
96x48 3.2 8.54 6.71 98.61 33.28 3.40 1.97 20.54 13.87 82.13 23.82 0.272
4.0 10.47 8.22 117.54 39.32 3.35 1.94 24.49 16.38 99.11 28.24 0.267
4.8 12.31 9.66 134.35 44.55 3.30 1.90 27.99 18.56 114.80 32.14 0.263
122x61 3.6 12.32 9.67 232.61 78.83 4.34 2.53 38.13 25.84 193.91 44.50 0.347
4.5 15.14 11.88 278.94 93.78 4.29 2.49 45.73 30.75 235.39 53.13 0.343
5.4 17.85 14.01 320.83 107.03 4.24 2.45 52.60 35.09 274.29 60.89 0.338
120x60 3.2 10.85 8.51 199.88 67.95 4.29 2.50 33.31 22.65 165.38 38.95 0.344
145x82 4.8 20.28 15.92 555.16 228.50 5.23 3.36 76.57 55.73 534.27 94.45 0.429
5.4 22.60 17.74 610.85 250.59 5.20 3.33 84.26 61.12 592.70 103.81 0.426
172x92 4.8 23.83 18.71 917.13 346.91 6.20 3.82 106.64 75.41 826.04 128.85 0.503
5.4 26.59 20.88 1012.47 381.74 6.17 3.79 117.73 82.99 918.10 142.04 0.500
220x140* 4.0 27.75 21.78 1892.55 947.64 8.26 5.84 172.05 135.38 2000.01 223.99 0.699
5.0 34.36 26.97 2313.36 1155.66 8.21 5.80 210.31 165.03 2467.63 273.47 0.694
6.0 40.83 32.05 2713.97 1351.66 8.15 5.75 246.72 193.09 2922.95 320.55 0.689
7.0 47.18 37.03 3094.76 1537.22 8.10 5.71 281.34 219.60 3366.29 365.35 0.684
260x180* 4.0 34.15 26.81 3357.53 1917.45 9.92 7.49 258.27 213.05 3822.78 346.87 0.859
5.0 42.36 33.25 4121.36 2349.53 9.86 7.45 317.03 261.06 4730.34 425.47 0.854
6.0 50.43 39.59 4855.87 2763.43 9.81 7.40 373.53 307.05 5619.50 501.05 0.849
7.0 58.38 45.83 5561.50 3159.50 9.76 7.36 427.81 351.06 6490.62 573.71 0.844
300x200* 5.0 48.36 37.96 6241.05 3360.92 11.36 8.34 416.07 336.09 6882.77 551.49 0.974
6.0 57.63 45.24 7370.23 3962.19 11.31 8.29 491.35 396.22 8186.02 650.85 0.969
7.0 66.78 52.42 8460.99 4540.76 11.26 8.25 564.06 454.09 9465.89 746.83 0.964

Slenderness Ratio Vs Allowable Axial Stress (in MPa) in Compression

Specification

Slenderness Ratio
( 1 eff/r )
Steel Grade Slenderness Ratio
(1 eff/r )
Steel Grade Slenderness Ratio
(1 eff/r | )
Steel Grade
Yst 240 Yst 310 Yst 240 Yst 310 Yst 240 Yst 310
10 144 186 100 79 87 190 30 31
20 142 183 110 71 77 200 28 28
30 140 178 120 63 67 210 25 26
40 134 169 130 56 60 220 23 23
50 127 157 140 50 53 230 21 22
60 118 143 150 45 47 240 20 20
70 109 128 160 41 42 250 18 18
80 98 113 170 37 38 300 13 13
90 88 99 180 33 34 350 10 10
1 eff = Effective length considering lateral restraint , r = Radius of Gyration of the section (in same unit of 1 eff

Other Allowable Stress values ( in MPa)

Steel Grade Minimum Yeild Stress Minimum UTS Axial Stress in Tension Bending Stress in Ten. or Compn. Shear Stress Bearing Stress Equivalent Stress
Yst 240 240 410 144 158 108 180 216
Yst 310 310 450 186 205 140 232 279

General Technical Specifications and Tolerances

Length: 6.0m ± 50mm customized length ranging from 4m to 1m may be supplied
Thikness: for all sizes: ± 10.0%
Outer Dimensions: ± 1% with a minimum of ± 0.5mm
Corner Squareness: 90° ± 2°
Corner Radii: Maximum, 3 x (thikness of the section)
Weight: On individual length: + 10% ,On lots of 10 MT : ± 7.5%
Twist Tolerance: Maximum 2 mm +0.5mm/m length - the 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
Surface Finish: Black without any surface treatment of oiling or varnishing
Weld Ability: RHS / SHS are weld able with standard M.S electrode without any preheating
Note: RHS/SHS in customized size, grade, length, surface finish and end finish may be delivered as per agreed supply condition.

Applications

Furniture industries & domestic applications, Automatic Chasis, Cabins, Bus stands, Milk Booths, Scaffoldings, Cranes, Material Storage Racks, Furniture partition frame work., Pallets, Guard Rails, Staircases, Hand railings, fencing poles Hydraulic Platforms, Truck & Bus body Members Trusses, Columns & Purlins, Trolleys etc.

Advantage of Using Closed Structural ( RHS / SHS)
Specification ( RHS / SHS)

Closed Structural (RHS / SHS) pipes command several tech no-economic advantages over Conventional Structurals.

    The Raw material for these structurals comes from sail.

    The excellent distribution of the materials around the axis of Closed Structurals exhibit remarkable strength qualities and thus offer decisive advantages as regards to applications technology.

    Due to their high torsional rigidity and compressive strength, Closed Structurals behave more efficiently than Conventional Structurals

    Their higher strength to weight ratio results in upto 40% savings in steel.

    The smooth, uniform profile of these sections minimise corrosion and facilitate easy, at-site fabrication.

    Closed Structurals also enhance the aesthetic appeal of structures..

The Question of Internal Corrosion

    Internal corrosion can not occur in sealed RHS/ SHS as moistture is excluded and oxygen unreplenished

    Outer smooth profiles ensures no ttrap of dirt and water, thus reducing the chance of corrosion reaction.

» Agricultural Implement Frames » Large Span Portal frames Material Storage Racks
» Amusement Park and playground Equipments » Mine Roof Supports system (cogs, props)
» Automobile Chassis » Pallets
» Bridges » Pedestrian Walkovers ( Footbridge)
» Bus Stands » Sign Supprting Structure
» onveyor Gantries, Trestles Cranes » Space Frames
» Drilling Rigs » Sports Galleries
» Exhibition Stalls » Transmission Line Towers
» Furnitures, Partition frames » Trolleys
» Flood Light Masts » Truck and Bus Body Members
» Guard rails, Staircases » Trusses, Columns and Purlins
» Iindustrial Lifting Equipment » and lots of other applications....
» Industrial Sheds

Applications

Furniture industries & domestic applications, Automatic Chasis, Cabins, Bus stands, Milk Booths, Scaffoldings, Cranes, Material Storage Racks, Furniture partition frame work., Pallets, Guard Rails, Staircases, Hand railings, fencing poles Hydraulic Platforms, Truck & Bus body Members Trusses, Columns & Purlins, Trolleys etc.

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