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5003.8.3.2 Percentage of maximum allowable quantities.
The percentage of maximum allowable quantities of hazardous materials per control area allowed at each floor level within a building shall be in accordance with FC Table 5003.8.3.3.
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.
5003.8.3.4 Fire-resistance rating requirements.
The required fire-resistance rating for fire barriers shall be in accordance with FC Table 5003.8.3.3. The floor assembly of the control area and the construction supporting the floor of the control area shall have a minimum 2-hour fire-resistance rating.
Exception: The floor assembly of the control area and the construction supporting the floor of the control area may be 1-hour fire-resistance rated in a building of Type IIA, IIIA and VA construction that is three stories or less in height and protected throughout by a sprinkler system.
5003.8.3.5 Hazardous materials in Group M display and storage areas and in Group S storage areas.
The aggregate quantity of nonflammable solid and nonflammable or noncombustible liquid hazardous materials allowed within a single control area of a Group M display and storage area or a Group S storage area is allowed to exceed the maximum allowable quantities specified in FC Tables 5003.1.1(1) and 5003.1.1(2) without classifying the building or use as a Group H occupancy, provided that the materials are displayed and stored in accordance with FC 5003.11.
5003.8.4 Gas rooms.
Where a gas room is provided to comply with the requirements of FC Chapter 60, the gas room shall be in accordance with FC 5003.8.4.1 and 5003.8.4.2.
5003.8.4.1 Construction.
Gas rooms shall be protected throughout by a sprinkler system. Gas rooms shall be separated from the remainder of the building in accordance with the construction codes, including the Building Code, based on the occupancy group into which the building has been classified.
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