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Planning
WARNING
Ensure weight of wall above is
NOT carried by the appliance.
Non-combustible material
Wood framing with 1/2" (13 mm) clearance allowed at
corners only. Otherwise use steel framing if against appliance.
2" (51 mm)
clearance to
combustible
Non-combustible
material only
against appliance
Non-combustible
material only
against appliance
2" (51 mm)
Combustible finishing materials up to 1-1/4" (32 mm)
clearance to
thickness allowed below opening height.
combustible
Combustible projections greater than 1-1/4" (32 mm)
must otherwise be kept min. 4" (102 mm) below opening.
Clearances—Combustible Projections
1/2" (13 mm) clearance to appliance
2" (51 mm) clearance to combustible
Framing/Finishing of projections/
Extensions around fireplace opening
must be non-combustible material
Combustible projections allowed in this area provided area is separated
from the main cavity by non-combustible wall finish. Otherwise everything
below stand-off height and within cavity must be non-combustible.
Non-combustible wall finish
here separating cavity from
combustible projections
Wood stud allowed
at corners only
Combustible wall finish
allowed if framing
out to flanged opening
10" (254 mm) min.
sidewall clearance
45°
Projecting surfaces
within 4" (102 mm)
of opening must be
non-combustible
4"
(102 mm)
Min. 9" (229 mm);
beyond, can be combustible
Non-combustible wall finish
here separating cavity from
combustible projections
45°
2" (51 mm)
clearance to
combustible
11
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