Side length (mm) section area Bai (cm2) theoretical weight (kg / M) side length (mm) section area (cm2) theoretical weight (kg / M)

5 0.25 0.196 30 9.00 7.06

6 0.36 0.283 32 10.24 8.04

7 0.49 0.385 34 11.56 9.07

8 0.64 0.502 36 12.96 10.17

9 0.81 0.636 38 14.44 11.24

10 1.00 0.785 40 16.00 12.56

11 1.21 0.95 42 17.64 13.85

12 1.44 1.13 45 20.25 15.90

13 1.69 1.33 48 23.04 18.09

14 1.96 1.54 50 25.00 19.63

15 2.25 1.77 53 28.09 22.05

16 2.56 2.01 56 31.36 24.61

17 2.89 2.27 60 36.00 28.26

18 3.24 2.54 63 39.69 31.16

19 3.61 2.82 65 42.25 33.17

20 4.00 3.14 70 49.00 38.49

21 4.41 3.46 75 56.25 44.16

22 4.84 3.80 80 64.00 50.24

24 5.76 4.52 85 72.25 56.72

25 6.25 4.91 90 81.00 63.59

26 6.76 5.30 95 90.25 70.85

28 7.84 6.15 100 100.00 78.50