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Installing Support Brackets (Figure 37)
A horizontal pipe support MUST BE used for each 3 feet of horizontal
run. The pipe supports should be placed around the pipe and nailed
in place to framing members. There MUST BE a 3 inch clearance
to combustibles above 6 5/8 inch diameter pipe and elbows and
1 inch clearance on both sides and bottom of 6 5/8 inch pipe to
combustibles on all horizontal pipe sections and elbows.
Vertical runs of this vent systems must be supported every 4 feet
above the appliance flue outlet by wall brackets attached to the 6
5/8 inch vent pipe and secured with nails or screws to structural
framing members.
Installing Firestops
Firestops are required for safety whenever the vent system pass-
es through an interior wall, an exterior wall, or a ceiling. These
firestops act as a firebreak heat shield and as a means to insure
that minimum clearances are maintained to the vent system.
Horizontal Firestops (Figure 38)
Horizontal runs in the vent system which pass through either inte-
rior or exterior walls, require the use of wall firestops on both sides
of the wall through which the vent passes.
Position the firestops on both sides of the framed hole, previously
cut. Refer to Figure 23 on page 16 for sizing information. Secure
firestop with nails or screws. The heat shields of the firestops
MUST BE placed towards the top of the hole. Continue the vent
run through the firestops.
26988-3-1012
FRAMING AND FINISHING
Figure 37
WALL FIRESTOP
vertical Firestops (Figures 39, 40 and 41
Vertical runs of this system which pass through celings require the
use of ONE (1) ceiling firestop at the hole in each ceiling through
which the vent passes.
Position a plumb bob directly over the center of the vertical vent
component and mark the ceiling to establish the center point of the
vent. Drill a hole or drive a nail through this center point and check
the floor above for any obstructions such as wiring or plumbing
runs. Reposition the appliance and vent system, if necessary, to
accommodate ceiling joists and/or obstructions.
Cut a 10 inch x 10 inch hole through the ceiling, using the center
point previously marked. Frame the hole with framing lumber the
same size as the ceiling joists. See Figure 39. If the area above
the ceiling is NOT an attic, position and secure the ceiling firestop
on the ceiling side of the previously cut and framed hole. See Fig-
ure 40. If the area above the ceiling is an attic, position and secure
the firestop on top of the previously framed hole. See Figure 41.
NOTE: Remove insulation from the framed area in the attic before
installing the firestop and/or vent pipes.
Figure 38
Page 23
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