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Ceiling Chimney Hole/
Possible Obstructions
The size of the hole in the ceiling will vary with the
angle at which the chimney passes through ceiling.
Drive a nail up through ceiling at marked chimney
center point. Go to floor above and see where hole
will be cut. Check to see where existing ceiling joists
and other possible obstructions are located...i.e. wiring,
plumbing etc... If necessary, re-position chimney and/or
fireplace to avoid obstructions.
Cutting the Hole
Cover fireplace collar opening and cut proper sized
chimney hole in chimney. The SK8 pipe allows you to
run pipe through a typical 16" on center joist without
cutting joists.
Framing the Ceiling Hole
Frame the ceiling chimney hole as shown in Figure
10. It is good practice to use framing lumber that is the
same size as the ceiling joists; this is a requirement at
attic level.
Size of
Chimney
Vertical
8" Flue
14¹⁄₂ x 14¹⁄₂
(368 x 368mm)
Fig. 9 Ceiling chimney hole sizes necessary for installing
firestop spacer.
The inside dimension of the frame must be the same
as the hole size selected from Figure 10 in order to
provide the required 1¹⁄₂" air space between the outside
diameter of the chimney and the edges of the framed
ceiling hole.
14¹⁄₂"
Existing
(368mm)
Ceiling
Joists
Ceiling
New Framing
Members
Fig. 10 Typical frame for ceiling chimney hole
20001316
Angle of chimney at ceiling
30°
14¹⁄₂ x 25¹⁄₂
(368 x 648mm)
14¹⁄₂"
(368mm)
Chimney Hole
FP551A
FP551a
CR36 Series
2/22/99 djt
CR Series Woodburning Fireplaces
Positioning, Safety Strips,
Securing the Fireplace
Slide fireplace into position.
Lift the fireplace front slightly and slide the metal safety
strips under front bottom edge about 1¹⁄₂" (38mm), al-
lowing the remainder to extend in front of firebox. Over-
lap strips at least 1/2" (13mm) to provide a positive joint.
(Flat safety strips are packed with fireplace.) (Fig. 11)
Safety strips are used to ensure that any combustible
materials in front of the fireplace are protected even
though a noncombustible hearth extension is required.
If fireplace is to be elevated above the floor, a "Z"
shaped metal safety strip must be fabricated and used
to protect combustible surfaces in front of the fireplace.
This "Z" shaped safety strip is not provided but must
be fabricated of metal with each horizontal leg at least
1¹⁄₂" (38mm) wide and equal in length to the metal strips
provided with the fireplace.
NOTE: Safety strips are not required over noncombus-
tible floors where all supports at the base of the fire-
place are noncombustible.
Outside Air Kit
An outside air kit damper is installed in all CR36L/R
Series Fireplaces. If desired, or if local codes mandate
the use of an air kit, then an AK-MST is required to
complete the installation (from air kit to the outdoors). If
the outside air kit is to be used, the AK-MST Air Termi-
nation Kit MUST be installed BEFORE the fireplace is
enclosed. Refer to the AK-MST instructions for field in-
stallation. NOTE: Outside air control knob can be found
in screen bag.
¹⁄₂" (13mm)
Min. Overlap
1¹⁄₂"
(38mm)
1¹⁄₂"
(38mm)
Fig. 11 Safety strip installation.
Metal Safety
Strips
(1, 2 or 3 pieces)
"Z"
Fire-
Safety
place
Strip
(not supplied)
Plat-
Hearth Ext.
form
FPR557
FPR557
CR36R,L
9
Safety strip installa
2/3/99 djt
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