Table 5

Size. Inches.

Grade.

Sheets in Box.

Lb. in Box.

Gauge.

14x20

IC

112

113

29

14x20

IX

112

143

27

14x20

IXX

112

162

26

14x20

IXXX

112

182

25

14x20

IXXXX

112

202

24

20x28

IC

112

224

29

20x28

IX

112

280

27

20x28

IXX

112

322

26

Terne Plate.

14x20

IC

112

112

29

14x20

IX

112

140

27

20x28

IC

112

224

29

20x28

IX

112

280

27

65. The following table shows the length and diameter of leader pipes made from stock sizes of tin, and the length of pipe that may be made from 1 box of tin:

Table 6

Sheets.

Boxes.

Diameter of Pipe in

Inches.

Number of Sheets.

Size of

Sheets in

Inches.

Length of Pipe in Feet and Inches.

Number Sheets in Box.

Length of Pipe in Feet.

6 1/5

1

14 x 20

1' 1 1/2"

112

126

4 1/3

1

14 x 20

1' 7 1/2"

112

181

4

2

14 x 20

3' 3"

112

182

3 1/8

1

14 x 20

2' 3"

112

252

2 1/2

1

14 x 20

3' 4 1/2"

112

378

If, for example, the leader pipe is to be 4 inches in diameter, and the circumference 12 1/2 inches, it is plain that only one length can be had out of the 14 in. X 20 in. Allowing 1/4-inch lap for each joint at top and bottom, and using two sheets for a length of pipe, we have 20 in. X 2 - 1 in. = 39 inches, or 3 feet 3 inches; and 39 in. x 56, half the number of sheets in a box, gives 182 feet, the length of leader sections that may be constructed from 1 box.

66. The following table gives length of semicircular eaves gutters that may be made from 1 box of tin: