Square Bar

Metric Units
Designation Area of Second Moment Radius of Elastic Plastic
Size Mass per Metre Section of Area Gyration Modulus Modulus
a A l r Z S
mm kg/m lb/ft mm2 mm4 mm mm3 mm3
9 0.64 0.43 81 547 2.60 122 182
10 0.79 0.53 100 833 2.89 167 250
12 1.13 0.76 144 1728 3.46 288 432
16 2.01 1.35 256 5461 4.62 683 1024
18 2.54 1.71 324 8748 5.20 972 1458
19 2.83 1.90 361 10860 5.48 1143 1715
20 3.14 2.11 400 13333 5.77 1333 2000
22 3.80 2.55 484 19521 6.35 1775 2662
25 4.91 3.30 625 32552 7.22 2604 3906
28 6.15 4.14 784 51221 8.08 3659 5488
30 7.07 4.75 900 67500 8.66 4500 6750
32 8.04 5.40 1024 87381 9.24 5461 8192
35 9.62 6.46 1225 125052 10.1 7146 10719
36 10.17 6.84 1296 139968 10.4 7776 11664
38 11.34 7.62 1444 173761 11.0 9145 13718
44 15.20 10.21 1936 312341 12.7 14197 21296
50 19.63 13.19 2500 520833 14.4 20833 31250
55 23.75 15.96 3025 762552 15.9 27729 41594
60 28.26 18.99 3600 1080000 17.3 36000 54000
65 33.17 22.29 4225 1487552 18.8 45771 68656
70 38.47 25.85 4900 2000833 20.2 57167 85750
75 44.16 29.67 5625 2636719 21.7 70313 105469
80 50.24 33.76 6400 3413333 23.1 85333 128000
85 56.72 38.11 7225 4350052 24.5 102354 153531
90 63.59 42.73 8100 5467500 26.0 121500 182250
95 70.85 47.61 9025 6787552 27.4 142896 214344