Code excerpt

The California Uniform Building Code (CUBC) occupancy requirements for laboratories are as follows:

CUBC Section 304 - Requirements for Group B Occupancies

304.1 Group B Occupancies Defined

14. Laboratories - testing and research

[Laboratories - testing and research; Universities]

304.2.2 Special Provisions

304.2.2.1 Laboratories and vocational shops [Universities]

Laboratories and vocational shops in buildings used for educational purposes, and similar areas containing hazardous materials... [The code includes tables showing amounts of hazardous materials and corresponding requirements]. When the quantities of hazardous materials in such uses exceed those listed… [the code refers to tables corresponding to particular occupancy designations].

304.5 Light, Ventilation and Sanitation. Light, ventilation and sanitation shall be accordance with Chapters 12 and 29 [see the complete code] and this section.

304.5.1 Ventilation of flammable vapors. See Section 1202.2.2 for ventilation of flammable vapors.

CUBC Section 306 - Requirements for Group F Occupancies

306.1 Group F Occupancies Defined

306.1 General. Group F.....

Division 1.

17. Electronics assembly

20. Food processing

30. Optical goods

306.5 Light, Ventilation and Sanitation. In Group F Occupancies, light, ventilation and sanitation shall be accordance with Chapters 12 and 29 [see the complete code] and this section.

CUBC Section 307 - Requirements for Group H Occupancies

307.1 Group H Occupancies Defined.

Division 6. Semiconductor fabrication facilities and comparable research and development areas in which hazardous production materials (HPM) are used and the aggregate quantity of materials are in excess of… [see the complete code for cited tables and sections]. Such facilities and areas shall be designed and constructed in accordance with… [see the complete code for cited tables and sections].

Division 7. Occupancies having quantities of materials in excess of those listed… [the code refers to tables corresponding to particular occupancy designations] that are health hazards, including:

1. Corrosives.

2. Toxic and highly toxic materials.

3. Irritants.

4. Sensitizers.

5. Other health hazards.

Division 8. (For SFM) Laboratories and similar areas used for scientific experimentation or research having quantities of materials not in excess of those listed… and not otherwise classified as Group B Occupancies. Such laboratories may be classified as Group B Occupancies when quantities of materials are not in excess of those listed… Laboratories having quantities of materials in excess of those listed… and which are located below the fourth story may be classified as a Group H, Division 7 Occupancy… [see complete code for the tables and sections cited].

307.2.12 Special Provisions for Group H, Division 8 Occupancies.

...The interstitial space above the lab shall be separated from the corridor by one-hour construction.

...Fume hood exhaust ducts exposed to fire-resistive exit corridors shall be separated from the corridor by one-hour fire-resistive construction.

307.5 Light, Ventilation, and Sanitation.

307.5.2 Ventilation in hazardous locations. See Section 1202.2.3 for ventilation requirements in hazardous locations.

307.5.5 Ventilation in Group H, Division 8 Occupancies. In all Group H, Division 8 Occupancies, exhaust streams when combined shall not create a physical hazard or react to degrade the contained material. The building official may require a technical report in accordance with Section 307.1.6 [see the complete code for section cited].

Fire dampers in fume hood exhaust ducts are expressly prohibited.

Ducts from laboratory hoods and local exhaust systems shall be constructed entirely of noncombustible material.

Exceptions:

1. Flexible ducts for special local exhausts used within a laboratory area.

2. Combustible ducts with flame-spread index less than 75 located within a shaft of noncombustible construction where passing through areas other than the laboratory units they serve and provided with internal fire sprinklers.

3. Combustible ducts or duct linings having a flame spread of 25 or less.

Exhaust ducts from each laboratory unit shall be separately ducted to a point outside the building, to a mechanical space or to a shaft. Connection to a common duct may occur at those points. Exhaust ducts within the same laboratory unit may be combined within that laboratory unit.

Perchloric acid hoods and exhaust ducts shall be constructed of materials that are acid resistant, nonreactive, and impervious to perchloric acid. A water-spray system shall be provided for washing down the hood interior behind the baffle and the entire duct system. Ductwork shall provide a positive drainage slope back to the hood and shall consist of sealed sections. The hood baffle shall be removable for inspection.

307.11 Group H, Division 6 Occupancies.

307.11.2 Fabrication area.

307.11.2.4 Ventilation. See Section 1202.2.5 for ventilation requirements. =>1202.2.1 and 1202.2.3 and 1202.2.5

307.11.2.6 Electrical. ...The requirements for hazardous locations need not be applied when the average air change is at least four times that set forth in Section 307.11.2.4 [see the complete code for sections cited] and when the number of air changes at any location is not less than three times that required by Section 307.11.2.4 and the Fire Code [see the complete code for sections cited].

307.11.5 Storage of hazardous production materials [HPM].

  1. Ventilation. Mechanical exhaust ventilation shall be provided in liquid storage rooms, HPM rooms and gas rooms at the rate of not less than 1 cubic foot per minute per square foot (0.044L/s/m2)of floor area or six air changes per hour, whichever is greater, for all categories of materials.

    Exhaust ventilation for gas rooms shall be designed to operate at a negative pressure in relation to the surrounding areas and direct the exhaust ventilation to an exhaust system.

Group B or F-1<Table 3D or <Table 3E

Group H-8See UBC <Table 3D.1 or <Table 3I

Group H-7See UBC <Table 3D or >Table 3E

Group H-6See UBC >Table 3D or >Table 3E

[see the complete code for table sited].

Table 3D footnotes

6. Quantities may be increased 100 percent in sprinklered buildings. When Footnote 10 [see complete code for footnote 10] also applies, the increase for both footnotes may be applied.

10. Quantities may be increased 100 percent when stored in approved storage cabinets, gas cabinets or exhausted enclosures as specified in the Fire Code. When Footnote 6 also applies, the increase for both footnotes may be applied.

Table 3D.1 footnotes

1. A laboratory suite is a space up to 10,000 square feet (929 m2)... Up through the third floor and down through the first basement floor, the quantity in this table shall apply. Fourth, fifth and sixth floors and the second and third basement floor level quantity shall be reduced to 75 percent of this table. The seventh through 10th floor and below the third basement floor level quantity shall be 50 percent of this table.

2. Quantities may be increased 100 percent when stored in approved exhausted gas cabinets, exhausted enclosures or fume hoods.

Table 3E footnotes

5. Quantities may be increased 100 percent in sprinklered buildings. When Footnote 6 also applies, the increase for both footnotes may be applied.

6. Quantities may be increased 100 percent when stored in approved storage cabinets, gas cabinets or exhausted enclosures as specified in the Fire Code. When Footnote 5 also applies, the increase for both footnotes may be applied.

Table 3I footnotes

1. A laboratory suite is a space up to 10,000 square feet (929 m2)... Up through the third floor and down through the first basement floor, the quantity in this table shall apply. Fourth, fifth and sixth floors and the second and third basement floor level quantity shall be reduced to 75 percent of this table. The seventh through 10th floor and below the third basement floor level quantity shall be 50 percent of this table.

2. Permitted only when stored or used in approved exhausted gas cabinets, exhausted enclosures or fume hoods. Quantities of high toxics in use in open systems need not be reduced above the third floor or below the first basement floor level. Individual container size shall be limited to 2 pounds (0.91 kg) for solids and 1/4 gallon (0.95 L) for liquids.

CUBC Chapter 12 - Interior Environment

Section 1202 - Light and Ventilation in Groups A, B, E, F, H, I, M, and S Occupancies

1202.2 Ventilation.

1202.2.1 General. All enclosed portions of Groups A, B, E, F, H, I, M, and S Occupancies customarily occupied by human beings shall be provided...with a mechanically operated ventilation system. ...Such a mechanically operated ventilation system shall be capable of supplying a minimum of 15 cubic feet per minute of outside air per occupant in all portions of the building during such time as the building is occupied.

1202.2.2 Group B… Occupancies. In all buildings classified as Group B… Occupancies or portions thereof where Class I, II or III-A liquids are used, a mechanically operated exhaust ventilation shall be provided sufficient to produce six air changes per hour. Such exhaust ventilation shall be taken from a point at or near the floor level.

1202.2.3 Group H Occupancies. ...Ducts conveying explosives or flammable vapors, fumes or dusts shall extend directly to the exterior of the building without entering other spaces. ...

EXCEPTION: Ducts conveying vapor or fumes having flammable constituents less than 25 percent of their lower flammability limit may pass through other spaces.

1202.2.5 Group H, Division 6 Occupancies. In Group H, Division 6 Occupancies, mechanical exhaust ventilation shall be provided throughout the fabrication area at the rate of not less than 1 cubic foot per minute per square foot (0.044 L/s/m2) of floor area. The exhaust air duct system of one fabrication area shall not connect to another duct system outside that fabrication area within the building.

...automatic shutoffs need not be installed on air-moving equipment.

Except for exhaust systems, at least one manually operated remote control switch that will shut down the fabrication area ventilation system shall be installed at an approved location outside the fabrication area. => control system

A ventilation system shall be provided to capture and exhaust fumes and vapors at work stations. Two or more operations shall not be connected to the same exhaust system when either one or the combination of the substances removed could constitute a fire, explosion or hazardous chemical reaction within the exhaust duct system.

Exhaust ducts penetrating occupancy separations shall be contained in a shaft of equivalent fire-resistive construction. Exhaust ducts shall not penetrate area separation walls. Fire dampers shall not be installed in exhaust ducts.

1202.2.5.1 {For State Fire Marshall} Ventilation in Group H, Division 8 Occupancies. In all Group H, Division 8 Occupancies, exhaust streams when combined shall not create a physical hazard or react to degrade the contained material. The building official may require a technical report in accordance with Section 307.1.6 [see the complete code for section cited].

Fire dampers in fume hood exhaust ducts are expressly prohibited.

Ducts from laboratory hoods and local exhaust systems shall be constructed entirely of noncombustible material.

Exceptions: 1. Flexible ducts for special local exhausts used within a laboratory area.

2. Combustible ducts with flame-spread index less than 75 located within a shaft of noncombustible construction where passing through areas other than the laboratory units they serve and provided with internal fire sprinklers.

3. Combustible ducts or duct linings having a flame spread of 25 or less.

Exhaust ducts from each laboratory unit shall be separately ducted to a point outside the building, to a mechanical space or to a shaft. Connection to a common duct may occur at those points. Exhaust ducts within the same laboratory unit may be combined within that laboratory unit.

Perchloric acid hoods and exhaust ducts shall be constructed of materials that are acid resistant, non-reactive, and impervious to perchloric acid. A water-spray system shall be provided for washing down the hood interior behind the baffle and the entire duct system. Ductwork shall provide a positive drainage slope back to the hood and shall consist of sealed sections. The hood baffle shall be removable for inspection.


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