installation
Cutting Hole in Ceiling
I
L
DOUBLE
HEADERS
BOXED JOISTS
FOF
8” DIA.
FIRESTOP
SPACER
1~
Locate renter of opening in ceiling to prevent
joist
being cut if possible.
Firestop
spacer in
ceiling for 8” dia. pipe will fit between standard
spacing of
ioists.
2,
Drill hole in center of opening through ceiling and
layout
14!$”
square opening on ceiling for 8” dia.
pipe,
(1
6’92”
square opening for 10” dia. pipe)
firestop
spacer.
3. Cut out opening. Double headers should be
placed between
ioists
for extra support and nailed
in place. (See Figs.
11
and 12.) NOTE: If 30’
firestop
spacer is used, the long side of opening
must be
22%“,
with 8” dia. pipe;
or
24%” with
10” dia. pipe.
FIRE STOP SPACER
NOTE: If BFSL Thimble is used, boxed area will
have to be 17%” sq.
BOTTOM SIDE OF JOISTS
located at the bottom of each framed opening in any
floor or ceiling that the Triple Wall Pipe passes through,
(See Fig. 13). except uppermost where insulation is
between
ioists.
Then spacer must be
on
top of
ioists.
Portions of the chimney that may pass through ac-
cessible spaces
must
be enclosed maintaining 1” mini-
mum clearance to avoid personal contact with or
damage to the chimney.
Keep Insulation Away From Chimney!
installing the chimney
If Chimney Passes Through
Floor or Ceiling
If chimney passes through a floor or ceiling, a
fire-
stop spacer must be used.
Firestop
spacer should be
TRIPLE WALL PIPE
REMOVE
\
NAILS FROM
SHINGLES
WHERE FLASHING
ATTACH WITH
8
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