The percentage of maximum allowable quantities of hazardous materials per control area permitted at each floor level within a building shall be in accordance with Table 414.2.2.
|FLOOR LEVEL|| PERCENTAGE OF THE MAXIMUM ALLOWABLE |
QUANTITY PER CONTROL AREAa
| NUMBER OF CONTROL AREAS |
| FIRE-RESISTANCE RATING FOR |
FIRE BARRIERS IN HOURSb
| Above grade |
|Higher than 9||5||1||2|
| Below grade |
|Lower than 2||Not Allowed||Not Allowed||Not Allowed|
- Percentages shall be of the maximum allowable quantity per control area shown in Tables 307.1(1) and 307.1(2), with all increases allowed in the notes to those tables.
- Separation shall include fire barriers and horizontal assemblies as necessary to provide separation from other portions of the building.