Length.

2 in.

3 in.

4 in.

5 in.

6 in.

7in.

8 in.

9 in.

10 in.

11 in.

12 in.

13 in.

14 in.

15 in.

5

ft.

12 .4

44

102

184

288

414

500

728

910

1,120

1,354

-

_

_

6

,,

9.4

36

88

104

204

380

532

698

884

1,082

1,320

1,570

-

-

7

,,

7.2

30

70

146

242

360.

502

600

850

1,056

1,282

1,530

1,798

2,086

8

,,

-

24

66

130

218

332

470

630

812

1,016

1,240

1,486

1,754

2,040

9

,,

-

20

56

114

198

306

440

596

774

974

1,196

1,440

1,706

1,092

10

,,

-

18

48

102

180

282

410

560

739

932

1,152

1.302

1,050

1,040

12

,,

-

-

38

80

136

238

354

494

658

846

1,050

1,292

1,550

1,828

14

,,

-

-

28

64

122

200

304

432

556

774

900

1,192

1.440

1,712

16

,,

-

-

-

52

100

170

202

378

520

686

878

1,004

1,332

1,500

18

,,

-

-

-

44

84

144

220

332

462

616

790

1,000

1,228

1,482

20

,,

-

-

-

-

72

124

196

292

410

552

720

912

1,130

1,372

For tubes or hollow columns, subtract the weight that may be borne by a column of the size of the internal diameter of the tube or column. The thickness of metal should not be less than one-twelfth the diameter.