IS 4923 (Edition 1997)

HOLLOW SECTIONS : Square and Rectangular

Field of Application                    >                Square & Rectangular Hollow Steel Section for Structural Use.

Production Standards               >                IS 4923 (Edition 1997)
..                                                                        Gr YST 210, YST 240 & YST 310

Finishing Operations                 >                Plain End (Square Cut End)

Coating                                         >                Black

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DIMENSION THICKNESS WEIGHTKG/METER
L B 1.60 1.80 2.00 2.30 2.60 2.80 2.90 3.20 3.60 4.00 4.50 5.00 5.40 6.00 7.00
25 25 1.12 1.25 1.36 1.53 1.69 1.79 1.84 1.98 2.16 2.31
32 32 1.48 1.64 1.80 2.04 2.26 2.41 2.48 2.69 2.95 3.19
40 40 1.88 2.09 2.31 2.62 2.92 3.11 3.21 3.49 3.85 4.20
49.50 49.50 2.35 2.63 2.90 3.30 3.69 3.95 4.07 4.45 4.93 5.39
60 60 2.88 3.22 3.56 4.06 4.55 4.87 5.03 5.50 6.11 6.71 7.43
72 72 3.90 4.32 4.93 5.53 5.93 6.12 6.71 7.47 8.22 9.13
80 80 4.82 5.50 6.18 6.63 6.85 7.51 8.37 9.22 10.26 11.27
90 90 6.23 7.00 7.51 7.76 8.51 9.51 10.48 11.67 12.84
100 100 7.82 8.39 8.67 9.52 10.64 11.73 13.09 14.41 15.45
113 113 9.53 9.86 10.83 12.10 13.37 14.92 16.45 17.66
132 132 11.59 12.74 14.25 15.75 17.61 19.43 20.88 23.01
150 150 13.23. 14.54 16.29 18.01 20.15 22.26 23.93 26.40 30.44
180 180 17.56 19.68 21.78 24.39 26.97 29.02 32.05 37.04
225 225 24.77 27.43 30.75 34.04 36.65 40.53 46.93
DIMENSION THICKNESS WEIGHTKG/METER
L B 1.60 1.80 2.00 2.30 2.60 2.80 2.90 3.20 3.60 4.00 4.50 5.00 5.40 6.00 7.00
50 25 1.75 1.95 2.15 2.44 2.71 2.89 2.98 3.24 3.57 3.88
60 40 2.38 2.66 2.93 3.34 3.73 3.99 4.12 4.50 4.98 5.45
66 33 2.63 2.90 3.30 3.69 3.95 4.07 4.45 4.93 5.39
80 40 3.22 3.56 4.06 4.55 4.87 5.03 5.50 6.11 6.71 7.43
80 60 4.19 4.78 5.37 5.75 5.94 6.51 7.24 7.97 8.85
96 48 4.93 5.53 5.93 6.12 6.71 7.47 8.22 9.13
120 60 7.00 7.51 7.76 8.51 9.51 10.48 11.67 12.48
145 82 9.88 9.90 10.88 12.16 13.43 14.99 16.53 17.74
172 92 11.59 12.74 14.25 15.75 17.61 19.43 20.88
150 100 12.03 13.46 14.87 16.62 18.34 19.69 21.69
250 100 19.11 21.15 23.68 26.19 28.17 31.11 35.94
300 150 27.43 30.75 34.04 36.65 40.53 46.93

Tolerances:

A) Thickness for all sizes a) Welded tubes ± 10%
B) Outside Dimensions of Sides ± 1% of the side to be measured with a minimum of +/- 0.5mm
C) Weight a) On Individual Lenght
b) On Lots of 10 Tonnes
± 10% – 8%0
D) Squareness of Corner 90° ± 2°
E) Radius of Coners 3T, max where T is the thickness of section
F) Lenght a) Exact Length
b) Random Length
± 6mmThis may be obtained by arrangements between the purchaser and manufacturer
G) Straightness Minimum 1: 200th of any lenght measured along the center line (mill straightened condition) unless otherwise specifically arranged
H) Twist Tolerance Maximum 2mm: 1:0.5mm, 1mm length, the measured relative vertical shift of any adjacent corner of the section, measured by keeping one side on flat surface