[F] 415.10.1 Fabrication Areas
Fabrication areas shall comply with Sections 415.10.1.1 through 415.10.1.8.
Hazardous materials and hazardous production materials (HPM) shall comply with Sections 415.10.1.1.1 and 415.10.1.1.2.
The aggregate quantities of hazardous materials stored and used in a single fabrication area shall not exceed the quantities set forth in Table 415.10.1.1.1.
[F] TABLE 415.10.1.1.1
QUANTITY LIMITS FOR HAZARDOUS MATERIALS IN A SINGLE FABRICATION AREA IN GROUP H-5a
| HAZARD CATEGORY | SOLIDS (pounds per square foot) | LIQUIDS (gallons per square foot) | GAS (cubic feet @ NTP/square foot) | |
| PHYSICAL-HAZARD MATERIALS | ||||
| Combustible dust | Note b | Not Applicable | Not Applicable | |
| Combustible fiber | Loose | Note b | Not Applicable | Not Applicable |
| Baled | Notes b, c | |||
| Combustible liquid | II | Not Applicable | 0.01 | Not Applicable |
| IIIA | 0.02 | |||
| IIIB | Not Limited | |||
| Combination Class | I, II and IIIA | 0.04 | ||
| Cryogenic gas | Flammable | Not Applicable | Not Applicable | Note d |
| Oxidizing | 1.25 | |||
| Explosives | Note b | Note b | Note b | |
| Flammable gas | Gaseous | Not Applicable | Not Applicable | Note d |
| Liquefied | Note d | |||
| Flammable liquid | IA | Not Applicable | 0.0025 | Not Applicable |
| IB | 0.025 | |||
| IC | 0.025 | |||
| Combination Class | IA, IB and IC | 0.025 | ||
| Combination Class | I, II and IIIA | 0.04 | ||
| Flammable solid | 0.001 | Not Applicable | Not Applicable | |
| Organic peroxide | Unclassified detonable | Note b | Not Applicable | Not Applicable |
| Class I | Note b | |||
| Class II | 0.025 | |||
| Class III | 0.1 | |||
| Class IV | Not Limited | |||
| Class V | Not Limited | |||
| Oxidizing gas | Gaseous | Not Applicable | Not Applicable | 1.25 |
| Liquefied | 1.25 | |||
| Combination of gaseous and liquefied | 1.25 | |||
| Oxidizer | Class 4 | Note b | Note b | Not Applicable |
| Class 3 | 0.003 | 0.03 | ||
| Class 2 | 0.003 | 0.03 | ||
| Class 1 | 0.003 | 0.03 | ||
| Combination Class | 1, 2, 3 | 0.003 | 0.03 | |
| Pyrophoric materials | 0.01 | 0.00125 | Notes d and e | |
| Unstable (reactive) | Class 4 | Note b | Note b | Note b |
| Class 3 | 0.025 | 0.0025 | Note b | |
| Class 2 | 0.1 | 0.01 | Note b | |
| Class 1 | Not Limited | Not Limited | Not Limited | |
| Water reactive | Class 3 | Note b | 0.00125 | Not Applicable |
| Class 2 | 0.25 | 0.025 | ||
| Class 1 | Not Limited | Not Limited | ||
| HEALTH-HAZARD MATERIALS | ||||
| Corrosives | Not Limited | Not Limited | Not Limited | |
| Highly toxic | Not Limited | Not Limited | Note d | |
| Toxics | Not Limited | Not Limited | Note d | |
| For SI: 1 pound per square foot = 4.882 kg/m2, 1 gallon per square foot = 40.7 L/m2, 1 cubic foot @ NTP/square foot = 0.305 m3 @ NTP/m2, 1 cubic foot = 0.02832 m3. |
| a. Hazardous materials within piping shall not be included in the calculated quantities. |
| b. Quantity of hazardous materials in a single fabrication shall not exceed the maximum allowable quantities per control area in Tables 307.1(1) and 307.1(2). |
| c. Densely packed baled cotton that complies with the packing requirements of ISO 8115 shall not be included in this material class. |
| d. The aggregate quantity of flammable, pyrophoric, toxic and highly toxic gases shall not exceed 9,000 cubic feet at NTP. |
| e. The aggregate quantity of pyrophoric gases in the building shall not exceed the amounts set forth in Table 415.5.2. |
The maximum quantities of hazardous production materials (HPM) stored in a single fabrication area shall not exceed the maximum allowable quantities per control area established by Tables 307.1(1) and 307.1(2).
Fabrication areas, whose sizes are limited by the quantity of hazardous materials allowed by Table 415.10.1.1.1, shall be separated from each other, from corridors and from other parts of the building by not less than 1-hour fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both.
- Doors within such fire barrier walls, including doors to corridors, shall be only self-closing fire door assemblies having a fire protection rating of not less than 3/4 hour.
- Windows between fabrication areas and corridors are permitted to be fixed glazing listed and labeled for a fire protection rating of not less than 3/4 hour in accordance with Section 716.
Occupied levels of fabrication areas shall be located at or above the first story above grade plane.
Except for surfacing, floors within fabrication areas shall be of noncombustible construction.
Elevator hoistways, vent shafts and other openings through floors shall be enclosed where required by Sections 712 and 713. Mechanical, duct and piping penetrations within a fabrication area shall not extend through more than two floors. The annular space around penetrations for cables, cable trays, tubing, piping, conduit or ducts shall be sealed at the floor level to restrict the movement of air. The fabrication area, including the areas through which the ductwork and piping extend, shall be considered a single conditioned environment.
Mechanical exhaust ventilation at the rate of not less than 1 cubic foot per minute per square foot [0.0051 m3/(s • m2)] of floor area shall be provided throughout the portions of the fabrication area where HPM are used or stored. The exhaust air duct system of one fabrication area shall not connect to another duct system outside that fabrication area within the building.
HPM shall be transported to fabrication areas through enclosed piping or tubing systems that comply with Section 415.10.6, through service corridors complying with Section 415.10.3, or in corridors as permitted in the exception to Section 415.10.2. The handling or transporting of HPM within service corridors shall comply with the Florida Fire Prevention Code.
Electrical equipment and devices within the fabrication area shall comply with NFPA 70. The requirements for hazardous locations need not be applied where the average air change is at least four times that set forth in Section 415.10.1.6 and where the number of air changes at any location is not less than three times that required by Section 415.10.1.6. The use of recirculated air shall be permitted.
Workstations shall not be energized without adequate exhaust ventilation. See Section 415.10.1.6 for workstation exhaust ventilation requirements.