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4100-I ACT WOOD INSERT
Page 8
September 1, 2008
R
250-7201E
Floor
Ceiling
Caulk
Floor
(second Story)
Non-Combustible
Firestopping
Material
clearance from exterior
2 inch
(51mm)
A chimney must be the required height above the roof
or other obstruction for safety and for proper draft oper-
ation. The requirement is that the chimney must be at
least feet (91cm) higher than the highest point where
it passes through the roof, and at least 2 feet (61cm)
higher than the highest part of the roof or structure that
is within10 feet (05cm) of the chimney, measured hori
-
zontally.
CHIMNEY REQUIREMENTS
Non-combustible
from combustible material
and insulation
ceilin
At least 2 ft
(61cm)
At least ft
(91cm)
CHIMNEY HEIGHT
10 ft
(05cm)
CHIMNEY TOP VIEW
FLUE
Foundation
1/2" (12.7mm) airspace
5/8" (16mm)
Fireclay Flue
Liner
Chimney Wall
4" (102mm)
Nominal
OVALIZING ROUND STAINLESS STEEL
LINERS
Ovalizing round stainless steel liners to accommodate
the liner passing through the damper region of a re-
place is an allowable and acceptable practice.
Ensure that the ovalization is minimized to the extent
required to t through the damper.