Number of Gauge.

Thickness. Inches.

Black Iron. Weight per

Sq. Ft. Pounds.

Number of Gauge.

Thickness. Inches.

Black Iron. Weight per Sq. Ft. Pounds.

Galvanized Iron. Weight per Sq. Ft. Pounds.

1

.300

12.0

16

.065

2.6

3.0

2

.284

11.4

17

.058

2.3

2.7

3

.259

10.4

18

.049

2.0

2.3

4

.238

9.5

19

.042

1.7

2.1

5

.220

8.8

20

.035

1.4

1.7

6

.203

8.1

21

.032

1.3

1.5

7

.180

7.2

22

.028

1.1

1.3

8

.165

6.6

23

.025

1.0

1.2

9

.148

5.9

24

.022

0.9

1.1

10

.134

5.4

25

.020

0.8

1.0

11

.120

4.8

26

.018

0.7

1.0

12

.109

4.4

27

.016

0.6

0.9

13

.095

3.8

28

.014

0.6

0.7

14

.083

3.3

29

.013

0.5

0.7

15

.072

2.9

30

.012

0.5

0.6