Combustible Mantel; Sidewalls/Surrounds - Heatilator ST42A Owner's Manual

E. Combustible Mantel
• Refer to shaded areas of Figure 11.4 for
locations and dimensions of a combustible
mantel.
• A combustible mantel may be positioned no
lower than 12 in. (305 mm) above the top
of the fi replace opening.
• A combustible mantel may have a maximum
depth of 12 in. (305 mm).
• Combustible trim and materials cannot be
placed within 6 in. (152mm) of the fi replace
opening (top or sides).
• Combustible materials projecting more than
1 1/2 in. (38 mm) shall not be placed within
12 in. (305 mm) from the top of the fi replace
opening.
• Combustible trim must not cover the metal
surfaces of the fi replace.
• Mantel clearance is in accordance with
Section 7-3.3.3 of ANSI/NFPA211.
F. Sidewalls/Surrounds
• Adjacent combustible sidewalls must be located a minimum of 12 in. (305 mm) from the fi replace opening.
• Combustible or non-combustible mantel legs, surrounds and stub walls may be constructed per Figure 11.5.
11 3/8 in.
[289 mm]
Figure 11.5 Mantel Leg or Wall Projections (acceptable on both sides of opening)
40
Combustible Wall
2 x 4 stud wall
Standoffs
Non-combustible
Decorative Facing
such as: Steel, iron,
brick, tile, concrete,
slate, tile, plasters
Seal joint with
non-combustible
sealant
Figure 11.4 Clearances to Mantels or other Combustibles above Fireplace
Gridlines at 1 in. scale
FLUSH
FRONT
42 in.
[1067 mm]
fireplace opening
47 in.
[1194 mm]
width of fireplace
12 in.
[305 mm]
Combustible
Decorative Facing
12 in./305 mm
Mantel
12 in./305 mm
6 in./152 mm
1 1/ 2 in.
minimum
38 mm
maximum
Measured from top of fireplace opening
4 in.
BRICK
[102 mm]
FRONT
9 3/4 in.
[248 mm]
12 in.
[305 mm]
7 ft (2134 mm)
minimum
base of fireplace
to ceiling
minimum