31629-20-0320
Page 27
Figure 42
See
Horizontal Termination
Page 29 and
Vertical Termination
Pages 30-31.
Figure 41
FRAMING AND FINISHING (CONT’D)
Vertical Firestops
Vertical runs of this system which pass through ceilings require
the use of ONE 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 40.
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 Figure
41.
If the area above the ceiling is an attic, position and secure the
firestop on top of the previously framed hole.
See Figure 42.
NOTICE:
Remove insulation from the framed area in the attic before
installing the firestop and/or vent pipes.
Figure 40
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