15" (381 mm)
DIA. GALVANIZED
OUTER PIPE
HEMMED
END
10" (254 mm)
STAINLESS
INNER PIPE
LANCED SIDE UP
Figure 15
It is important to assure that the joint between the chimney sections is fully locked. Check by pulling chimney upward after locking.
The chimney should not come apart if properly locked. It is not necessary to add screws to keep vertical or angled chimney runs together.
WARNING: THE OPENINGS AROUND THE START- ING COLLAR ON TOP OF THE FIREBOX MUST NEVER BE OBSTRUCTED. NEVER USE BLOWN INSULA- TION TO FILL THE CHIMNEY ENCLOSURE.
FIREBOX SPACER
Firebox spacers are required at each point where the chimney penetrates a floor or ceiling, joist space. Their purpose is two fold; they establish and maintain the required clearance between the outer pipe and combustible materials, and they also serve as a shield between floors as required by most codes.
When the pipe passes through a framed opening into a living space above, a firestop must be placed on the ceiling below (Figure 16).
LIVING SPACE
ABOVE CEILING
EXISTING CEILING
FRAME
SCREW
(TYP. OF 8)
FIRESTOP
SPACER
ATTIC SPACE
ABOVE CEILING
EXISTING CEILING
Figure 17 | FRAME |
|
SUPPORT SECTIONS
The chimney support section is a 4 strap,
This support is designed to relieve the extra weight load on the firebox and elbows when high chimneys are installed.
SUPPORT
REQUIRED
30 FT. | 30 FT. |
(9.14m) | (9.14m) |
RETURN
ELBOW
Figure 18
ELBOW OFFSET INSTALLATION
Chimney weight above offset rests on return elbow. Straps must be secured with nails to rafters or joists (see Figure 19).
FIRESTOP SPACER
SCREW (TYP. OF 8)
Figure 16
When the pipe passes through a framed opening into an attic space above, a firestop must be placed on the attic floor above (Figure 17).
2" (50.8mm)
MINIMUM
STRAPS | ANGLE |
| FIRESTOP |
CEILING SUPPORT
RETURN
PIPE
Figure 19
ELBOW
8 | 55505 |