5003.8.3.3 Number.
The maximum number of control areas per floor within a building or structure shall be in accordance with FC Table 5003.8.3.3.
Floor Level | Percentage of the Maximum Allowable Quantity per Control Area a | Number of Control Areas per Floor | Fire-Resistance Rating for Fire Barriers in Hours b | |
Above grade plane | Higher than 9 7 - 9 6 5 4 3 2 1 | 5 5 12.5 12.5 12.5 50 75 100 | 1 2 2 2 2 2 3 4 | 2 2 2 2 2 1 1 1 |
Below grade plane | 1 2 Lower than 2 | 75 50 Not Allowed | 3 2 Not Allowed | 1 1 Not Allowed |
a. Percentages shall be of the maximum allowable quantity per control area shown in FC Tables 5003.1.1(1) and 5003.1.1(2), with all increases allowed in the footnotes to those tables.
b. Fire barriers shall include walls and floors as necessary to provide separation from other portions of the building.