WALL BRACKET |
WALL STUD |
NOTE: There must be NO INSULATION or other combustibles inside the framed firestop opening.
8 FT. (2.4m) |
FLUE |
OUTLET |
1 INCH MIN. |
(25.4mm) |
HEAT SHIELD
INTERIOR
FIRESTOP
TRIM HEAT SHIELD IF TOO LONG, ADD TO SHIELD IF TOO SHORT
EXTERIOR
FIRESTOP
Figure 25. Installing Support Brackets
4. Install Firestops
For Horizontal Runs - Firestops are REQUIRED on both sides of a combustible wall through which the vent passes.
NOTE: Model
To install firestops for horizontal runs that pass through either interior or exterior walls:
• Cut a 12” x 12” (305mm x 305mm) hole through the wall.
NOTE: The center of the hole is one (1) inch (25.4mm) above the center of the horizontal vent pipe.
•Position the firestops on both sides of the hole previ- ously cut and secure the firestops with nails or screws.
•The heat shields of the firestops MUST BE placed to- wards the top of the hole.
•Continue the vent run through the firestops.
Figure 27. Heat Shield, Interior & Exterior Firestops
For Vertical Runs - One ceiling firestop is REQUIRED at the hole in each ceiling through which the vent passes.
To install firestops for vertical runs that pass through ceilings:
•Position a plumb bob directly over the center of the verti- cal vent component.
•Mark the ceiling to establish the centerpoint of the vent.
•Drill a hole or drive a nail through this centerpoint.
•Check the floor above for any obstructions, such as wir- ing or plumbing runs.
•Reposition the fireplace and vent system, if necessary, to accommodate the ceiling joists and/or obstructions.
•Cut an
•Frame the hole with framing lumber the same size as the ceiling joists.
12"
(305mm)
12"
(305mm)
1" (25.4 mm)
VENT PIPE
11" (280 mm)
NEW
FRAMING
MEMBERS
CEILING
11" (280mm)
CHIMNEY
HOLE
EXISTING CEILING JOISTS
Figure 26. 12" x 12" Hole and Vent Pipe
22