F. Install Support Brackets
For Horizontal Runs - The flue system must be supported every 5 ft. (1.52 m) of horizontal run by a horizontal pipe support. To install support brackets for horizontal runs:
•Place the pipe supports around the flue pipe.
•Nail the pipe supports to the framing members.
For Vertical Runs - The flue system must be supported every 8 ft. (2.44 m) above the fireplace flue outlet by wall brackets. To install support brackets for vertical runs:
•Attach wall brackets to the flue pipe and secure the wall bracket to the framing members with nails or screws.
WALL BRACKET |
WALL STUD |
2.44 m |
FLUE |
OUTLET |
25.4 mm |
10 in. (254 mm) |
INTERIOR |
WALL SHIELD |
10 in. (254 mm) |
Figure 10.13 Flue Pipe & Firestop
For Vertical Runs - One firestop is REQUIRED at the hole in each ceiling through which the flue passes.
To install firestops for vertical runs that pass through ceilings:
•Position a plumb bob directly over the center of the vertical flue component.
•Mark the ceiling to establish the centerpoint of the flue.
•Drill a hole or drive a nail through this center point.
•Check the floor above for any obstructions, such as wiring or plumbing runs.
•Reposition the fireplace and flue system, if necessary, to accommodate the ceiling joists and/or obstructions.
•Cut a 9 in. x 9 in. (229 mm x 229 mm) hole when using SLP pipe. Use the firestop pipe opening as a guide.
•Frame the hole with framing lumber the same size as the ceiling joists.
Figure 10.12 Installing Support Brackets
G. Install Firestops
For Horizontal Runs - Firestops are REQUIRED on both sides of a combustible wall through which the flue passes.
To install firestops (heat shield) for horizontal runs that pass through either interior or exterior walls:
A
NEW FRAMING MEMBERS
CEILING
B
CHIMNEY
HOLE
EXISTING CEILING JOISTS
•Cut a 10 inch by 10 inch (254 mm X 254 mm) hole through the wall.
•Position the firestops on both sides of the hole previously cut and secure the firestops with nails or screws.
•The pipe opening of the firestops MUST BE placed towards the bottom of the firestop.
•Continue the flue run through the firestop.
| A | B | |
SLP | 9 in. | 9 in. | |
(229 mm) | (229 mm) | ||
|
Figure 10.14 Hole and New Framing Members
Heat & Glo • | 49 |
