CHIMNEY INSTALLATION
LOCATING CENTER LINE
You will need to lay out, cut and frame openings through all ceilings and the roof at the point where the chimney will pass through.
Place fireplace in planned position for installation. Unless the chimney is to be offset, the point where the center line of the chimney will pass through the ceiling and roof can be determined with a plumb line. See Figure 16. Drive a nail in the center point.
Note: Make sure the chimney location is well away from ceiling and roof joists and/or anything else that might be in the way.
Drive a long nail through the roof from underneath to mark the roof opening center line. Make sure the nail is long en ought to go through the roof and be seen on the rooftop. If the chimney is to penetrate a pitched roof, the hole in the roof must be rectangular instead of square and should be sized according to Table 1.
Center Line
to Chimney Actual
Center Point
Plumb |
| |
Line |
| |
Plumb | Imaginary | |
Bob | ||
Center | ||
| ||
| Point |
Figure 16 - Dropping Plum Line
from Ceiling
INSTALLING FIRESTOP SPACER
Install the firestop spacer from beneath the ceiling as shown in Figure 17 unless the space above is attic space.
In an attic, install firestop spacer at the floor level of attic. You must have joists or headers on all four sides of the spacer. Use a minimum of four (4)
Inlet Air Pipe | Floor Joist |
|
|
|
| Inlet Air Pipe | |
Flue Pipe |
| Ceiling Joist | |
|
|
Flue Pipe
Header | Firestop |
|
Spacer | Firestop Spacer | |
| Chimney Section | Header |
| Chimney Section | |
Figure 17 - Installing Firestop Spacer | Figure 18 - Installing Firestop Spacer | |
at Floor Level |
| at Attic Level |
61D0008 | 17 |
