Modle

size(mm)

sectional area

theoretical weight

superficial area

A×b

T

r

(cm²)

(kg/m)

(m²/m)

2

20

3

3.5

1.132

0.889

0.078

4

1.459

1.145

0.077

2.5

25

3

3.5

1.432

1.124

0.098

4

1.859

1.459

0.097

3

30

3

4.5

1.749

1.373

0.117

4

2.276

1.786

0.117

3.6

36

3

4.5

2.109

1.656

0.141

4

2.756

2.163

0.141

5

3.382

2.654

0.141

4

40

3

5

2.359

1.852

0.157

4

3.086

2.422

0.157

5

3.791

2.976

0.156

4.5

45

3

5

2.659

2.088

0.177

4

3.486

2.736

0.177

5

4.292

3.369

0.176

6

5.076

3.985

0.176

5

50

3

5.5

2.971

2.332

0.197

4

3.897

3.059

0.197

5

50

5

5.5

4.803

3.77

0.196

6

5.688

4.465

0.196

5.6

56

3

6

3.343

2.624

0.221

4

4.39

3.446

0.22

5

5.415

4.251

0.22

8

8.367

6.568

0.219

6.3

63

4

7

4.978

3.907

0.248

5

6.143

4.822

0.248

6

7.288

5.721

0.247

8

9.515

7.469

0.247

10

11.657

9.151

0.246

7

70

4

8

5.57

4.372

0.275

5

6.875

5.397

0.275

6

8.16

6.406

0.275

7

9.424

7.398

0.275

8

10.667

8.373

0.274

7.5

75

5

9

7.367

5.818

0.295

6

8.797

6.905

0.294

7

10.16

7.976

0.294

8

11.503

9.03

0.294

10

14.126

11.089

0.293

8

80

5

9

7.912

6.211

0.315

6

9.397

7.376

0.314

7

10.86

8.525

0.314

8

12.303

9.658

0.314

10

15.126

11.874

0.313

9

90

6

10

10.637

8.35

0.354

7

12.301

9.656

0.354

8

13.944

10.946

0.353

10

17.167

13.476

0.353

12

20.306

15.94

0.352

10

100

6

12

11.932

9.366

0.393

7

13.796

10.83

0.393

8

15.638

12.276

0.393

10

19.261

15.12

0.392

10

100

12

12

22.8

17.898

0.391

14

26.256

20.611

0.391

16

29.627

23.257

0.39

11

110

7

12

15.196

11.928

0.433

8

17.238

13.532

0.433

10

21.261

16.69

0.432

12

25.2

19.782

0.431

14

29.056

22.809

0.431

12.5

125

8

14

11.932

15.504

0.492

10

13.796

19.133

0.491

12

15.638

22.696

0.491

14

19.261

26.193

0.49

14

140

10

14

27.373

21.488

0.551

12

32.512

25.522

0.551

14

37.567

29.49

0.55

16

42.539

33.393

0.549

16

160

10

16

31.502

24.729

0.63

12

37.441

29.391

0.63

14

43.296

33.987

0.629

16

49.067

38.518

0.629

18

180

12

16

42.241

33.159

0.71

14

48.896

38.383

0.709

16

55.467

43.542

0.709

18

61.955

48.634

0.708

20

200

14

18

54.642

42.894

0.788

16

62.013

48.68

0.788

18

69.301

54.401

0.787

20

76.505

60.056

0.787

24

90.661

71.168

0.785