Table 9

Side Lap.

Corrugation.

Length of End Lap.

1 in.

2 in.

3 in.

4 in.

5 in.

6 in.

One Corru-gation Lap.

2 1/2 in.

110 ft.

111 ft.

112 ft.

113 ft.

114 ft.

115 ft.

One and one-half

1 1/4 in.

110 ft.

111 ft.

112 ft.

113 ft.

114 ft.

115 ft.

Corrugation Lap.

3/4 in.

105 ft.

106 ft.

107 ft.

108 ft.

109 ft.

110 ft

The following table gives the width, depth, and number of corrugations to a sheet and the covering width, deducting lap.

Table 10

Width of

Corrugation.

Inches.

Depth of

Corrugation.

Inches.

Number of

Corrugations to Sheet.

Width of

Sheet after

Corrugation.

Inches.

Covering

Width after

Lapping One

Corrugation.

Inches.

2 1/2

1/2 to 5/8

10

26

24

1 1/4

3/8 to 1/2

19 1/2

26

24

3/4

1/4

34 1/2

26

25

The following table gives the gauge, thickness, and weight, in pounds per square foot, of galvanized sheet iron:

Table 11

Gauge

Number.

Thickness. Inch.

Weight.

Pounds Per

Square Foot.

16

.065

3.00

17

.058

2.69

18

.049

2.31

19

.042

2.07

20

.035

1.75

21

.032

1.50

22

.028

1.32

23

.025

1.19

24

.022

1.06

25

.020

1.00

26

.018

0.96

27

.016

0.88

28

.014

0.75