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FIRESTOP SPACERS: (3600FS-8DM)
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 21.
Figure 21
INSTRUCTIONS
WHEN
CHIMNEY IS NEEDED: (30E-8DM)
TO INSTALL ELBOWS
1. To achieve desired offset, you may install combinations
of 12", 18", 24", 36" and 48" length of double wall pipe
(SEE SINGLE OFFSET CHART, FIGURE 22 & 24).
SINGLE OFFSET CHART
OFFSET
RISE
A
B
48"
4 - 3/8
16 -3/8
9 - 3/4
25 - 1/2
12 - 3/4
30 - 3/4
15
34 - 3/4
18
40
21 - 1/4
46 - 1/4
23 - 3/4
49 - 1/4
27 - 3/4
56 - 3/4
1
30
60 - 3/4
33
66
1
36
71
1
38 - 1/4
75
41 - 1/4
80 - 1/4
45
86 - 3/4
46 - 3/4
89 - 1/2
1
51
97
1
53 - 1/4
101
56 - 1/4
106 - 1/4
2
59 - 1/4
111 - 1/2
1
61 - 3/4
115 - 1/2
2
64 - 3/4
120 - 3/4
2
68 - 1/4
127
1
70
130
2
74 - 1/4
137 - 1/2
1
76 - 3/4
141 - 1/2
1
79 - 3/4
146 - 3/4
2. Chimney weight above offset rests on return elbow.
Straps must be securely nailed to rafters or joists (see
figure 22, details a & b).
ELBOW
OFFSET
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
3. Maximum length of pipe between supports (return elbow
or 12S-8DM) is 6' of angled run. Maximum of two (2) 6'
angled run sections per chimney system (see figure 24).
Figure 22
OF
All joints between offset
should be secured with two
screws, only on the outer
pipe, and shall not penetrate
the inner stainless.
12"
1
Figure 23
1
1
1
1
1
1
1
Figure 24
*For systems with 2 elbow sets, the maximum height 20 ft.
9
*TYPICAL OFFSET INSTALLATION
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