3-9.Square steel pipe for general structureiRectanglej
Side length
mm



thickness
mm



Cross-sectional area
cm2



unit
mass
kg/m



Moment of inertia of area
cm4



Second moment of area
radius
cm



Moment of inertia
cm3
AxB t Ix Iy ix iy Zx Zy
50x20 1.6 2.072 1.63 6.08 1.42 1.71 0.829 2.43 1.42
50x20 2.3 2.872 2.25 8.00 1.83 1.67 0.798 3.20 1.83
50x30 1.6 2.392 1.88 7.96 3.60 1.82 1.23 3.18 2.40
50x30 2.3 3.332 2.62 10.6 4.76 1.79 1.20 4.25 3.17
60x30 1.6 2.712 2.13 12.5 4.25 2.15 1.25 4.16 2.83
60x30 2.3 3.792 2.98 16.8 5.65 2.11 1.22 5.61 3.76
60x30 3.2 5.087 3.99 21.4 7.08 2.05 1.18 7.15 4.72
75x20 1.6 2.872 2.25 17.6 2.10 2.47 0.855 4.69 2.10
75x20 2.3 4.022 3.16 23.7 2.73 2.43 0.824 6.31 2.73
75x45 1.6 3.672 2.88 28.4 12.9 2.78 1.88 7.56 5.75
75x45 2.3 5.172 4.06 38.9 17.6 2.74 1.84 10.4 7.82
75x45 3.2 7.007 5.50 50.8 22.8 2.69 1.80 13.5 10.1
80x40 1.6 3.672 2.88 30.7 10.5 2.89 1.69 7.68 5.26
80x40 2.3 5.172 4.06 42.1 14.3 2.85 1.66 10.5 7.14
80x40 3.2 7.007 5.50 54.9 18.4 2.80 1.62 13.7 9.21
90x45 2.3 5.862 4.60 61.0 20.8 3.23 1.88 13.6 9.22
90x45 3.2 7.967 6.25 80.2 27.0 3.17 1.84 17.8 12.0
100x20 1.6 3.672 2.88 38.1 2.78 3.22 0.870 7.61 2.78
100x20 2.3 5.172 4.06 51.9 3.64 3.17 0.839 10.4 3.64
100x40 1.6 4.312 3.38 53.5 12.9 3.52 1.73 10.7 6.44
100x40 2.3 6.092 4.78 73.9 17.5 3.48 1.70 14.8 8.77
100x40 4.2 10.60 8.32 120 27.6 3.36 1.61 24.0 10.6
100x50 1.6 4.632 3.64 61.3 21.1 3.64 2.13 12.3 8.43
100x50 2.3 6.552 5.14 84.8 29.0 3.60 2.10 17.0 11.6
100x50 3.2 8.927 7.01 112 38.0 3.55 2.06 22.5 15.2
100x50 4.5 12.17 9.55 147 48.9 3.47 2.00 29.3 19.5
125x40 1.6 5.112 4.01 94.4 15.8 4.30 1.76 15.1 7.91
125x40 2.3 7.242 5.69 131 21.6 4.25 1.73 20.9 10.8
125x75 2.3 8.852 6.95 192 87.5 4.65 3.14 30.6 23.3
125x75 3.2 12.13 9.52 257 117 4.60 3.10 41.1 31.1
125x75 4.0 14.95 11.7 311 141 4.56 3.07 49.7 37.5
125x75 4.5 16.67 13.1 342 155 4.53 3.04 54.8 41.2
125x75 6.0 21.63 17.0 428 192 4.45 2.98 68.5 51.1
150x75 3.2 13.73 10.8 402 137 5.41 3.16 53.6 36.6
150x80 4.5 19.37 15.2 563 211 5.39 3.30 75.0 52.9
150x80 5.0 21.36 16.8 614 230 5.36 3.28 81.9 57.5
150x80 6.0 25.23 19.8 710 264 5.31 3.24 94.7 66.1
150x100 3.2 15.33 12.0 488 262 5.64 4.14 65.1 52.5
150x100 4.5 21.17 16.6 658 352 5.58 4.08 87.7 70.4
150x100 6.0 27.63 21.7 835 444 5.50 4.01 111 88.8
150x100 9.0 39.67 31.1 113x10 595 5.33 3.87 151 119
200x100 4.5 25.67 20.1 133x10 455 7.20 4.21 133 90.9
200x100 6.0 33.63 26.4 170x10 577 7.12 4.14 170 115
200x100 9.0 48.67 38.2 235x10 782 6.94 4.01 235 156
200x150 4.5 30.17 23.7 176x10 113x10 7.64 6.13 176 151
200x150 6.0 39.63 31.1 227x10 146x10 7.56 6.06 227 194
200x150 9.0 57.67 45.3 317x10 202x10 7.41 5.93 317 270
250x150 6.0 45.63 35.8 389x10 177x10 9.23 6.23 311 236
250x150 9.0 66.67 52.3 548x10 247x10 9.06 6.09 438 330
250x150 12.0 86.53 67.9 685x10 307x10 8.90 5.95 548 409
300x200 6.0 57.63 45.2 737x10 396x10 11.3 8.29 491 396
300x200 9.0 84.67 66.5 105x102 563x10 11.2 8.16 702 563
300x200 12.0 110.5 86.8 134x102 711x10 11.0 8.02 890 711
350x150 6.0 57.63 45.2 891x10 239x10 12.4 6.44 509 319
350x150 9.0 84.67 66.5 127x102 337x10 12.3 6.31 726 449
350x150 12.0 110.5 86.8 161x102 421x10 12.1 6.17 921 562
400x200 6.0 69.63 54.7 148x102 509x10 14.6 8.55 739 509
400x200 9.0 102.7 80.6 213x102 727x10 14.4 8.42 107x10 727
400x200 12.0 134.5 106 273x102 923x10 14.2 8.23 136x10 923
References: "JIS Handbook 2001 (2) Steel II Rod / Shape / Plate / Strip / Steel Pipe / Wire / Secondary Product" (written by Japanese Standards Association) Square Steel Pipe for General Structure, page 676, Appendix Quoted from the dimensions and mass (rectangle) of square steel pipes for general structure.