Fig. #36
Roof Termination Venting Chart
NOTE: The vent must not exceed a total length of 68 feet. Any
combination of rise and run may be used but must be constrained
to the boundaries of this chart. A total of 4 90° elbows or combina-
tion of other elbows equalling 90° can be used without reducing
horizontal run. For each additional 90° elbow, or an equal com-
bination of elbows, reduce horizontal vent run by 2 feet. Ensure
vent pipe is properly supported.
** All dimensions are approximate. Both rise and run may vary with different
combinations of pipe.
12" Pipe
length
minimum
A
Minimum rise
B
Pipe length
C
Maximum run
D
Pipe length
Maximum
52 7/16"
1 x 12”
41"
1 x 24"
64 7/16”
1 x 24”
51 1/4"
1 x 24" + 1 x 12"
74 11/16”
1 x 24” + 1 x 12"
167 3/4"
3 x 48" + 1 x 12"
80 11/16”
1 x 24” + 1 x 18"
226"
4 x 48" + 1 x 24"
87 11/16”
1 x 48"
250"
5 x 48"
For other rise/run combinations see chart below
**
21
TC30_CE3 250313-
Summary of Contents for TC30.CE3
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