Clearance shall comply with the following:
1. Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustible material not less than that specified in Table 18-28-928.2.2(1). The distance from ground level to the base of the burner shall be a minimum of 7 feet (2.1 m) where installed within 2 feet (0.6 m) of walkways. Lesser clearances shall be permitted to be used where acceptable to the authority having jurisdiction.
Flame Height Above Burner Head (in.) | Minimum Clearance from Combustible Material (ft)* | |
Horizontal | Vertical | |
12 | 2 | 6 |
18 | 3 | 8 |
24 | 3 | 10 |
30 | 4 | 12 |
For SI units: 1 in. = 25.4 mm; 1 ft = 0.305 m.
* Measured from the nearest portion of the burner head.
2. Unlisted open-flame illuminating appliances installed outdoors shall be equipped with a limiting orifice or other limiting devices that will maintain a flame height consistent with the clearance from combustible material as given in Table 18-28-928.2.2(1).
3. Appliances designed for flame heights in excess of 30 inches (760 mm) shall be permitted to be installed if acceptable to the authority having jurisdiction. Such appliances shall be equipped with a safety shutoff device or automatic ignition.
4. Unlisted open-flame illuminating appliances installed indoors shall have clearances from combustible material acceptable to the authority having jurisdiction.