87D0058
19
SB50HB Series Woodburning Fireplace
CHIMNey OFFSeT INSTaLLaTION
eLBOW INSTaLLaTION
The following are important points that should be observed
when installing elbows on the fireplace:
1. The support straps of all elbows not installed directly
on top of the fireplace should be nailed securely to the
surrounding structure. This allows the support strap to
carry the weight of the chimney above the elbow and
prevents this weight from breaking the elbow or chimney
sections apart.
. Elbows should not be used in any combination that
inclines the chimney more than 30 degrees from
vertical.
3. The limitations on the quantity of elbows per chimney
are as follows: If the total height of the fireplace and
chimney is — 4 feet or more — two elbows may be
used in the chimney. 30 feet or more — four elbows
may be used in the chimney.
4. The inclined portions of chimneys that pass through
living spaces likely to be used for storage should be
enclosed to avoid contact with and possible damage
to the chimney. The minimum air space of two inches
between the chimney and enclosing materials must be
maintained.
5. The length of the inclined portion of chimney between
elbows must not exceed 6 feet when unsupported or
0 feet if the chimney is supported at six-foot intervals
with support such as metal support straps.
6. When enclosing the elbows and inclined portions of the
chimney, enclosing materials must be installed vertically
to maintain the required two-inch minimum air space
clearance to the chimney at the extremities of the offset.
It is recommended that enclosing material not follow the
inclined portions of the chimney.
&0
ELBOW
Figure 21
Inlet Air
Pipe
Flue
All four (4) support straps
must be nailed on to fram-
ing member around the
elbow with a minimum of
two () 8-Penny nails per
strap
NOTe:
Although both halves of the
elbow set may have tie straps, only
the top half must be secured. The
bottom elbow half is not required to
be secured for added stabilization of
pipe.
FP1893
OFFSeT INSTaLLaTION SequeNCe
1. Determine the location and amount of offset required,
then select the combinations of chimney sections and
elbows required from the offset chart. Refer to
Page
20
.
. Install the first 11CF30 elbow by placing the extended
flue into the mating part of the fireplace or chimney
section. Push down until the outside or inlet air duct of
the elbow overlaps and the snaps lock the elbow into
the fireplace or chimney section.
3. Nail the support straps to the framing member with a
minimum of two 8-penny nails per strap.
4. Install the sections of pipe between elbows until
the proper number of chimney sections have been
installed.
5. Install the second elbow to return the run of the chimney
to vertical.
6. Nail the support straps of the second elbow to a building
frame member.
7. Continue installing the vertical portion of the chimney.
NOTe:
If the inclined portion of the chimney passes
through a floor or ceiling, an FS6A firestop spacer should
be installed to provide the firestop and support required.
Be sure proper spacing in maintained between the chimney
and combustibles.
