Required Clearance to Combustibles
FIGURE 3
FIGURE 2
12
The MAGNUM Series replace and DM 54 chimney
system is tested and listed for installation with “clearance to com-
bustibles” as follows:
The MAGNUM Series rebox side walls and back wall
require 1-1/2” clearance. (Figure 3)
The smoke dome front wall requires 0” clearance.
All DM 44 and 54 chimney components require 0”
clearance. (Figure 2).
Note: “Combustibles” are dened as “normal construction materi-
als” and are considered to be: wood framing materials, particle
board, mill board, plywood sub-ooring, plywood paneling and
wood ooring.
Sheathing materials, such as plywood, particle board and
drywall may cover the smoke dome front at 0” clearance.
All combustible sheathing materials that protrude beyond front of
rebox must be held 8” away from the sides of the rebox opening
and 8” above the top of the rebox opening. Drywall must be cut
2” back from the rebox opening sides and 8” above the top of the
opening.
WARNING: Maintain a minimum of 3” clearance to insulation
and vapor barriers. (Figure 75)
Notes:
A. The MAGNUM Series replace is rated for
installation on a combustible oor system when using the Fire-Lite
application only. See pages 60-69 for Fire-Lite installation instruc-
tions.
The Magnum Series replace must sit upon a concrete
support slab designed to bear the total installed weight of the
replace and DM 54 chimney system. (See Figure 2 for additional
details). These support slabs can have no wood underpinnings.
(Figure 3)
B. Concrete support slabs for MAGNUM Series re-
places must provide the noncombustible hearth extension substrate
needed to support the code required noncombustible hearth exten-
sion nish materials. (Figures 2 and 3)
C. All MAGNUM Series replaces shall have hearth
extensions of approved noncombustible material such as brick,
tile, or stone that is properly supported and with no combustible
material against the underside thereof. Wooden forms used during
the construction of hearths and hearth extensions shall be removed
when the construction is complete.
D. If a raised replace oor and raised hearth extension
are preferred, the raised underlying structure must be built of non-
combustible material and must sit on noncombustible substrate.
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