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Screws
OFFSET
RISE
A
B
48"
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
/
"
1
3
3
4
4
30"
60
/
"
3
4
33"
66"
1
36"
71"
1
38
/
"
75"
1
4
41
/
"
80
/
"
1
1
4
4
45"
86
/
"
3
4
46
/
"
89
/
"
1
3
1
4
2
51"
97"
1
53
/
"
101"
1
4
56
/
" 106
/
"
2
1
1
4
4
59
/
" 111
/
"
1
1
1
4
2
61
/
" 115
/
"
2
3
1
4
2
64
/
" 120
/
"
2
3
3
4
4
68
/
"
127"
1
1
4
70"
130"
2
74
/
" 137
/
"
1
1
1
4
2
76
/
" 141
/
"
1
3
1
4
2
79
/
" 146
/
"
3
3
4
4
OFFSET CHART (22-50 FT. SYSTEM HEIGHT)
Figure 9 - Elbow Offset
127020-01A
VENTING INSTALLATION
B
A
CHIMNEY LENGTH
36"
24"
18"
ELBOW SET ONLY
1
1
1
1
1
1
1
1
1
2
1
1
2
1
1
2
1
1
1
1
2
1
2
2
1
4
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Continued
FIRESTOP SPACERS (3600FS-8DM-1)
Firestop spacers are required at each point
where the chimney penetrates a floor space.
Their purpose is to establish and maintain
the required clearance between the chimney
and the combustible materials. When the pipe
passes through a framed opening into a living
space above, the firestop must be placed onto
the ceiling from below as shown in Figure 10.
They also provide complete separation from
one floor space to another or attic space as
required by most codes. When the double wall
pipe passes through a framed opening into an
attic space, the firestop must be placed into an
attic floor as shown in Figure 11.
12"
1
1
Figure 10 - Firestop Spacer with Living
1
Firestop
Spacer
1
1
1
Figure 11 - Firestop Spacer with Attic
1
1
NOTICE:
thimble (FST30 or 38FST) is recom-
mended when negotiating a joist and to
prevent intrusion from insulation.
Space Above Ceiling
Screws or Staples
(Min. of 8)
Space Above Ceiling
The installation of a firestop
Existing
Ceiling
Frame
Firestop
Spacer
Screws or
Staples
(Min. of 8)
Existing
Ceiling
Frame
9
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