35010-2-1015
Page 29
FRAMING AND FINISHING (continued)
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 10-5/8 inch x 10-5/8 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 51.
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 52.
If the area above the ceiling is an attic, position
and secure the firestop on top of the previously framed hole.
See
Figure 53.
NOTE:
Remove insulation from the framed area in the attic before
installing the firestop and/or vent pipes.
Figure 51
Figure 52
Figure 53
Finishing
Finish the walls with the material of your choice.
Figure 2
on Page 9
shows the minimum vertical and corresponding maximum horizontal
dimensions of mantels or other combustible projections above the
top front edge of the fireplace.
Only non-combustible materials may be used to cover the black
fireplace front.
WARNING
When finishing the fireplace never obstruct or modify the
air inlet/outlet louvers in any manner. Provide adequate
clearances around air openings into the combustion
chamber.
CAUTION
If the joints between the finished wall and the fireplace surround (top
and sides) are sealed, a 300 Degree F minimum sealant material
must be used. These joints are not required to be sealed. Only
non-combustible material (using 300 Degree F minimum adhesive
if needed), can be applied as facing to the fireplace surround.
