Noncombustible Material Requirements with No Mantel Installed
(A) Noncombustible Material Measurement | Requirements for Safe Installation |
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12" or more | Adjustable canopy not required. |
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8" minimum to 12" | Install adjustable canopy. |
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Less than 8" | Extend noncombustible material to at least |
| 8" and install adjustable canopy (Figure 3 ). |
| or |
| Extend noncombustible material to a height |
| of at least 12". |
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Table 2 |
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Noncombustible Material Heights and Mantel Location | |
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| Requirements for Safe Installation |
| with Wood Mantel, Shelf or |
Noncombustible Material Measurement | Other Combustible Projection |
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12" or more | Adjustable canopy not required. Observe pro- |
| files shown in Figure 4. |
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8" minimum to 12" | Install adjustable canopy and observe pro- |
| files shown in Figure 5. |
| or |
| Extend heat resistant material to at least 12" |
| and observe profiles shown in Figure 4. |
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Table 3 |
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Example: The bottom of the mantel may project from the wall a maximum of 2 ¹ " at a minimum of 8" above the opening. The top shelf of the mantel may project a maximum of 6" at a minimum of 14 ¹ " above the opening.
12"
10" |
| |
8" | 26" | |
6" | ||
22 ¹⁄₂" | ||
2 ¹⁄₂" | ||
18 ⁵⁄₈" | ||
| ||
8" | 14 ¹⁄₂" | |
| ||
Min. |
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Hood (Canopy)
Noncombustible
Material
Figure 5
Step 5. Floor clearance: If combustible floor- ing materials, such as carpeting or asphalt tile, are to be located within 14" of the fireplace or firebox opening, the appliance base must be at least 5" above the combustible flooring material (Figure 6 ).
Step 4. Wood mantel, shelf or combustible projection requirements: To install a wood mantel, shelf or other combustible projection directly above the fireplace (firebox), refer to Table 3 and to Figures 4 and 5 for installation profiles.
If your mantel profile is unsafe, you may either:
•Raise the mantel to an acceptable height, or
•Remove the mantel.
10" | Ceiling |
8" |
|
6" |
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2 ¹⁄₂" | 42" |
| |
| 38 ⁵⁄₈" |
| 34 ¹⁄₂" |
28" |
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Noncombustible |
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Material |
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12" |
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Combustible Flooring
Material
5" Min.
Figure 6
The appliance base may be lower than 5" above the combustible flooring materials if the com- bustible flooring materials are more than 14" from the fireplace or firebox opening (Figure 7 ).
Example: The bottom of the mantel may project from the wall a maximum of 2 ¹ " at a minimum of 28" above the opening. The top shelf of the mantel may project a maximum of 6" at a minimum of 34 ¹ " above the opening.
Can be less than 5"
Combustible
Flooring
Material
14" Min.
Figure 4
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
Figure 7
5
