An Act Establishing a Standard Gauge for Sheet and Plate Iron and Steel.

Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled:

That for the purpose of securing uniformity the following is established as the only gauge for sheet and plate iron and steel in the United States of America, namely:

Number of Gauge

Approximate

Thickness in

Fractions of an inch

Approximate

Thickness in

Decimal Parts of an Inch

Weight per

Square Foot in Ounces

Avoirdupois

Weight per

Square Foot in Pounds

Avoirdupois

0000000

1-2

.5

320

20.00

000000

15-32

.46875

300

18.75

00000

7-16

.4375

280

17.50

0000

13-32

.40625

260

16.25

000

3-8

.375

240

15

00

11-32

.34375

220

13.75

0

5-16

.3125

200

12.50

1

9-32

.28125

180

11.25

2

17-64

.265625

170

10.625

3

1-4

.25

160

10

4

15-64

.234375

150

9.375

5

7-32

.21875

140

8.75

6

13-64

.203125

130

8.125

7

3-16

.1875

120

7.5

8

11-64

.171875

110

6.875

9

5-32

.15625

.100

6.25

10

9-64

.140625

90

5.625

11

1-8

.125

80

5

12

7-64

.109375

70

4.375

13

3-32

.09375

60

3.76

14

5-64

.078125

50

3.125

16

9-128

.0703125

45

2.8125

16

1-16

.0625

40

2.5

17

9-160

.05625

36

2.25

18

1-20

.05

32

2

19

7-160

.04375

28

1.75

20

3-80

.0375

24

1.50

21

11-320

.034375

22

1.375

22

1-32

.03125

20

1.25

23

9-320

.028125

18

1.125

24

1-40

.025

16

1

25

7-320

.021875

14

.875

26

3-160

.01875

12

.75

27

11-640

.0171875

11

.6875

28

1-64

.015625

10

.625

Number of Gauge

Approximate

Thickness in

Fractions of an inch

Approximate

Thickness in

Decimal Parts of an Inch

Weight per

Square Foot in Ounces

Avoirdupois

Weight per Square Foot in Pounds Avoirdupois

29

9-640

.0140625

9

.5625

30

1-80

.0125

8

.5

31

7-640

.0109375

7

.4375

32

13-1280

.01015625

6}

.40625

33

3-320

.009375

6

.375

34

11-1280

.00859375

5 1/2

.34375

35

5-640

.0078125

5

.3125

36

9-1280

.00703125

4 1/2

.28125

37

17-2560

.006640625

4 1/4

.265625

38

1-160

.00625

4

.25

And on and after July first, eighteen hundred and ninety-three, the same and no other shall be used in determining duties and taxes levied by the United States of America on sheet and plate iron and steel. But this act shall not be construed to increase duties upon any articles which may be imported.

Section 3. That in the practical use and application of the standard gauge hereby established a variation of two and one-half per cent, either way may be allowed.

Approved March 3, 1893.