1406.2.1.1.2 Fire separation greater than 5 feet.
BC § 1406.2.1.1.2
For fire separation distances greater than 5 feet (1524 mm), any exterior wall covering shall be permitted that has been exposed to a reduced level of incident radiant heat flux in accordance with the NFPA 268 test method without exhibiting sustained flaming. The minimum fire separation distance required for the exterior wall covering shall be determined from Table 1406.2.1.1.2 of this code based on the maximum tolerable level of incident radiant heat flux that does not cause sustained flaming of the exterior wall covering. Table 1406.2.1.1.2Minimum Fire Separation for Combustible Exterior Wall Coverings Fire Separation Distance (feet)Tolerable Level Incident Radiant Heat Energy (kW/m2 )Fire Separation Distance (feet)Tolerable Level Incident Radiant Heat Energy (kW/m2 )Fire Separation Distance (feet)Tolerable Level Incident Radiant Heat Energy (kW/m2 )Fire Separation Distance (feet)Tolerable Level Incident Radiant Heat Energy (kW/m2 )5 12.5 16 5.9 6 11.8 17 5.5 7 11.0 18 5.2 8 10.3 19 4.9 9 9.6 20 4.6 10 8.9 21 4.4 11 8.3 22 4.1 12 7.7 23 3.9 13 7.2 24 3.7 14 6.7 25 3.5 15 6.3 For SI: 1 foot = 304.8 mm, 1 Btu/H 2 × °F = 0.0057 kW/m 2 × K.
