Point
Factor
Distance from Inner Wall
10
"
D
uct
1
0.032
0.32
"
=
⅜
"
2
0.135
1.35
"
=
1¼
3
0.321
3.21
"
=
3¼
"
4
0.679
6.79
"
=
6¾
"
5
0.865
8.65
"
=
8⅝
"
6
0.979
9.79
"
=
9 ¾
"