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Straps
Detail A
Return Elbow
OFFSET
RISE
A
B
4
/
"
16
/
"
3
3
8
8
9
/
"
25
/
"
3
1
4
2
12
/
"
30
/
"
3
3
4
4
15"
34
/
"
3
4
18"
40"
21
/
"
46
/
"
1
1
4
4
23
/
"
49
/
"
3
1
4
4
27
/
"
56
/
"
3
3
4
4
30"
60
/
"
3
4
33"
66"
36"
71"
38
/
"
75"
1
4
41
/
"
80
/
"
1
1
4
4
45"
86
/
"
3
4
46
/
"
89
/
"
3
1
4
2
51"
97"
53
/
"
101"
1
4
56
/
" 106
/
1
1
4
4
59
/
" 111
/
"
1
1
4
2
61
/
" 115
/
3
1
4
2
64
/
" 120
/
3
3
4
4
68
/
"
127"
1
4
70"
130"
74
/
" 137
/
1
1
4
2
76
/
" 141
/
3
1
4
2
79
/
" 146
/
3
3
4
4
OFFSET CHART (22-50 FT. SYSTEM HEIGHT)
107826-01K
VenTing insTallaTion
Straps
Straps
Detail B Angle
Figure 11 - Ceiling Support Pipe 12S-8DM
CHIMNEY LENGTH
48" 36" 24" 18" 12"
ELBOW SET ONLY
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
1
1
1
1
2
1
" 2
1
1
1
"
2
" 2
1
1
2
2
1
" 1
2
" 1
2
1
"
4
Figure 12 - Elbow Offset
www.fmiproducts.com
Continued
Ceiling Support
Pipe 12S-8DM
Straps
Firestop
1
1
Screws
1
1
1
1
1
1
See Detail A
2" Min.
See Detail B
B
A
9
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