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• Drill a hole or drive a nail through this centerpoint.
• Check the floor above for any obstructions, such
as wiring or plumbing runs.
• Reposition the fireplace and vent system, if neces-
sary, to accommodate the ceiling joists and/or
obstructions.
• Cut an 11-inch X 11-inch (280 mm X 280 mm)for
D-series or 10-inch X 10-inch (254 mm X 254 mm)
for SLD-series pipe hole through the ceiling, using
the centerpoint previously marked.
• Frame the hole with framing lumber the same size
as the ceiling joists.
1. Cut the ceiling hole.
2. Add the new framing
members.
Figure 21. Hole and New Framing Members
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.
This shows a ceiling
installation.
Figure 22. Ceiling Firestop (Ceiling Side)
JOIST
CEILING FIRESTOP
NAILS (4 REQUIRED)
CEILING