Astria.us.com
126647-01_E
10
VENTING INSTALLATION
Continued
SUPPORT SECTIONS (12S-8DM)
The chimney support section is a 4-strap 12" length of pipe. The height
of a vertical chimney pipe supported
ONLY
by the fireplace, must not
exceed 20 feet. Chimney heights above 20 feet must be supported.
Figure 16 - Support Sections
20 FT.
(6.10 m)
20 FT.
(6.10 m)
12S-8DM
Support
Return
Elbow
Effective
Height of
Termination Cap
Effective
Height of
Termination Cap
Effective Height of
Termination Cap
RT-8DM
RT-8DM
RT-8DM
14' (4.27 m)
Min. Height
Standard Installation
Alternate Installation
15
'
(4.57 m)
Min. Height
2
'
(.61 m)
Max
Pipe Length
30E-8DM
Maximum
Height
60
'
(18.29 m)
Figure 17 - Typical Installation
Figure 15a - Firestop Thimble
Thimble
38FST or
FST30
Firestop