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39
E. Combustible Mantel
• Refer to the shaded areas of Figure 11.4 for locations and dimensions of a combustible mantel.
• A combustible mantel may be positioned no lower than 12 5/8 in. (321 mm) above the top of the replace opening.
• A combustible mantel may have a maximum depth of 10 in. (254 mm).
• Combustible trim and materials cannot be placed within 6 in. (152 mm) of the 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) above the top
of the replace opening.
• Combustible trim must not cover the metal surfaces of the replace.
• Mantel clearance is in accordance with Section 7-3.3.3 of ANSI/NFPA211.
Mantel
7 ft (2134 mm)
minimum
base of fireplace
to ceiling
Combustible wall
2 x 4 stud wall
Standoffs
Measured from top of fireplace opening
10 in./254 mm
1 1/2 in./38 mm
maximum
12 5/8 in./321 mm
minimum
12 in./305 mm
minimum
6 in./152 mm
minimum
Combustible
decorative facing
Non-combustible
decorative facing
such as steel, iron,
brick, tile, concrete,
slate, glass, plasters
Seal joint with
non-combustible
sealant
Grid represents
1 in. squares.
Figure 11.4 Clearances to Mantels or other Combustibles above Fireplace
Heatilator • CL36D, CR36D • 12538 • Rev Z 7/12