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INSTRUCTIONS
FOR
OFFSET OF CHIMNEY
USlNG ELBOWS
TO INSTALL
ELBOWS
1 .
To achieve desired offset, you may install combina-
tions of 12", 18",
36"+
lengths of double wall pipe
(see single offset
chati
and Figure
20A).
2.
Chimney weight above offset resls on return elbow.
Straps must
be
securely nailed to rafters or joists. (See
Figure 20B).
3.
Maximum length of pipe between supports (return
elbow
or
chimney pipe support)
is
6'
o f
angled
run.
Maximum of two 6' angled run sections per chimney
system. (Figure
20C).
4.
The maximum allowable offset
is 30'.
Elbows musl
be
secured
to the pipe utilizing a minimum of three
screws per joint. Fasten screw through outer pipe slot.
Drill 118" pilot hole
or
use self-drilling screws provided.
FIGURE 208
CHIMNEY
DETAIL A
PIPE
DETAIL B
FIGURE 20C
OFFSET
ELBOW
RETURN
ELBOW
OFFSET
OFFSET
ELBOW
CHIMNEY
I
TYPICAL OFFSET INSTALLATION
I
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