Majestic ODSHR42 Homeowner's Installation And Operating Manual page 10

ODSHR Outdoor Woodburning Fireplace
Cutting the Hole
Cover fireplace collar opening and cut proper sized
chimney hole in chimney.
Framing the Ceiling Hole
Frame the ceiling chimney hole as shown in Figure
13. It is good practice to use framing lumber that is the
same size as the ceiling joists; this is a requirement at
attic level.
The following table gives firestop spacer model num-
bers:
Chimney Hole Size
Size of Chimney
11" CF 2-Wall 17¹⁄₂" x 17¹⁄₂"
(445 x 445 mm)
Fig. 12 Ceiling chimney hole size necessary for installing
firestop spacer.
The inside dimension of the frame must be the same
as the hole size selected from Figure 12 in order to
provide the required 2" (51 mm) of air space between
the outside diameter of the chimney and the edges of
the framed ceiling hole.
10
Angle of Chimney at Ceiling
Vertical 30°
17⁷⁄₈" x 29⁵⁄₈"
(454 x 753 mm)
17¹⁄₂"
Existing
(445 mm)
Ceiling
Joists
New Framing
Members
Fig. 13 Typical frame for ceiling chimney hole.
17¹⁄₂"
(445 mm)
Chimney
Hole
FP551b
FP551b
SHR
5/11/99 djt
20002264