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HANDICAPPED CORRECTION LIST CHEMICAL LABORATORY UNIT CORRECTION LIST
(2000 edition, NFPA 45)
PLEASE NOTE: Circled items require correction by revised plans, addenda, field orders, or
change orders before plans can be approved for construction. Answers in letter form are not
acceptable. Starting construction before plans approval may be considered as just cause, by
the State, to issue a stop work order. [Rule 0780-2-3-.05] Issues of conflict between the Life
Safety Code (NFPA 101 2003 edition) and the building code (SBC 1999 edition) will be resolved
by accepting only the most stringent. [Rule 0780-2-2-.04]
I. PROCEDURES
1. Provide two copies of plans and one copy of specifications sealed (with signature and date)
by a registrant in accordance with the Architects and Engineers Licensing Law Rules. [Rule
0780-2-3-.03 and A&E Rule 0120-2-.08(3)] Other occupancy correction lists (such as
business occupancy) may need to be utilized as well.
2. Provide on the cover sheet the classification type of Laboratory: Class A, Class B, Class C,
and Class D.
3. Provide a material safety data sheet for every chemical used in the building.
II. LABORATORY UNIT FIRE HAZARD CLASSIFICATION [NFPA 45 2.2]
1. Laboratory units shall be classified as Class A (High Fire Hazard), Class B (Moderate Fire
Hazard), Class C (Low Fire Hazard), or Class D (Minimal Fire Hazard), according to the
quantities of flammable and combustible liquids specified in Table 2.2.1(a) and Table
2.2.1(b). [NFPA 45 2.2.1]
2. The total amount of flammable and combustible liquids outside of flammable liquid storage
rooms shall not exceed the quantities presented for Class D laboratory units in Table
2.2.1(a) or 2.2.1(b). (See 1.1.1, Exception No. 1.) [NFPA 45 2.2.1.4.1]
3. Quantities of flammable and combustible liquids, including liquids in laboratory units located
in health care occupancies, shall not exceed those specified for a Class D laboratory unit.
[NFPA 45 2.2.1.4.2]
4. For the purposes of determining laboratory fire hazard classification and the use of Tables
2.2.1(a) and 2.2.1(b), quantities of liquefied flammable gases shall be treated as if they were
Class I flammable liquids; that is, 4 L (1.1 gal) of liquefied flammable gas is to be considered
equivalent to 4 L (1.1 gal) of Class I flammable liquid. [NFPA 45 2.2.1.5]
5. Experiments and tests conducted in instructional laboratory units shall be under the direct
supervision of an instructor.
a) Laboratory units used for instructional purposes shall be limited to 50 percent of the
flammable and combustible liquids quantity for Class B laboratory units presented in
Tables 2.2.1(a) and 2.2.1(b).
b) Laboratory units used for the instruction of students through the 12th grade shall be
limited to 50 percent of the flammable and combustible liquids quantity for Class C
laboratory units presented in Tables 2.2.1(a) and 2.2.1(b). [NFPA 45 2.2.2]
Page 1 of 11
Rev. 06/23/2006 II.a. LABORATORY WORK AREA AND LABORATORY UNIT EXPLOSION HAZARD
CLASSIFICATION [NFPA 45 2.3]
1. A laboratory work area shall be considered to contain an explosion hazard if an explosion of
quantities or

concentrations of materials in 2.3.1(1) through (5) could result in serious or fatal
injuries to personnel within that laboratory work area. [NFPA 45 2.3.1]
2. A laboratory unit shall not be considered to contain an explosion hazard unless a laboratory
work area within that unit contains an explosion hazard great enough to cause major
property damage or serious injury outside that laboratory work area. [NFPA 45 2.3.2]
III. LABORATORY UNIT DESIGN AND CONSTRUCTION [NFPA 45 3.1]
1. The required construction of laboratory units shall be in accordance with Tables 3.1.1(a) and
3.1.1(b). [NFPA 45 3.1.1]
2. Regardless of the construction and fire protection requirements for laboratory units that are
specified in Table 3.1.1(a) or Table 3.1.1(b), laboratory units in educational occupancies
shall be separated from nonlaboratory areas by 1-hour construction. [NFPA 45 3.1.3]
3. Table 3.1.1(a) shall pertain to laboratory units protected by automatic sprinkler systems in
accordance with NFPA 13, Standard for the Installation of Sprinkler Systems. Where water
will create a serious fire or personnel hazard, a suitable nonwater automatic extinguishing
system shall be permitted to be an acceptable substitute for sprinklers. [NFPA 45 3.1.4]
4. Penetrations through fire-rated floor/ceiling and wall assemblies by pipes, conduits, bus
ducts, cables, wires, air ducts, pneumatic tubes and ducts, and similar building service
equipment shall be protected in accordance with NFPA 101. [NFPA 45 3.1.5]
5. All floor openings shall be sealed or curbed to prevent liquid leakage to lower floors. [NFPA
45 3.1.6]
6. Door assemblies in 1-hour-rated fire barriers shall be ¾ -hour rated. Door assemblies in 2-
hour-rated fire barriers shall be 1½ -hour rated. [NFPA 45 3.1.7]
7. Window assemblies shall be permitted in fire-rated wall assemblies having a required fire
resistance rating of 1 hour or less. Window assemblies shall be of an approved type and
shall have a fire protection rating in accordance with NFPA 101, Life Safety Code. Fire
window assemblies shall be installed in accordance with NFPA 80, Standard for Fire Doors
and Fire Windows. [NFPA 45 3.1.8]
8. Openings in fire-rated floor/ceiling and wall assemblies for air-handling ductwork or air
movement shall be protected in accordance with NFPA 90A, Standard for the Installation of
Air-Conditioning and Ventilating Systems. [NFPA 45 3.1.9]
9. The maximum area of a laboratory unit shall be determined by the fire hazard classification
[NFPA 45 3.2]
10. Life safety requirements for noninstructional laboratory units shall be in accordance with
Chapter 28, Industrial Occupancies, in NFPA 101, Life Safety Code. [NFPA 45 3.3.1]
11. Life safety requirements for instructional laboratory units for grades 12 and below shall be in
accordance with NFPA 101, Life Safety Code, for an educational occupancy. [NFPA 45
3.3.2]
Page 2 of 11
Rev. 06/23/2006 12. Life safety requirements for instructional laboratory units for above grade 12, and for Class
D medical laboratories located in facilities classified as business occupancies, shall be in
accordance with the NFPA 101 [NFPA 45 3.3.3]
III.
a
. DUCT CONSTRUCTION FOR HOODS AND LOCAL EXHAUST SYSTEMS [NFPA 45
6.5]
1. Ducts from laboratory hoods and from local exhaust systems shall be constructed entirely of
noncombustible materials. [NFPA 45 6.5.1]
2. Combustible ducts or duct linings shall have a flame spread index of 25 or less when tested
in accordance with NFPA 255, Standard Method of Test of Surface Burning Characteristics
of Building Materials. Test specimens shall be of the minimum thickness used in the
construction of the duct or duct lining. [NFPA 45 6.5.2]
3. Linings and coatings containing such fill as fiberglass, mineral wool, foam, or other similar
material that could accumulate chemical deposits shall not be permitted within laboratory
exhaust systems. [NFPA 45 6.5.3]
4. Duct systems for perchloric acid hoods shall be constructed in accordance with Section
6.11. [NFPA 45 6.5.4]
5. Materials used for vibration isolation connectors shall comply with 6.5.2. [NFPA 45 6.5.6]
6. Flexible connectors containing pockets in which conveyed material can collect shall not be
used in any concealed space or where strong oxidizing chemicals are used (e.g., perchloric
acid). [NFPA 45 6.5.7]
7. Controls and dampers, where required for balancing or control of the exhaust system, shall
be of a type that, in event of failure, will fail open to ensure continuous draft. [NFPA 45 6.5.8
and 6.10.3]
8. Hand holes, where installed for damper, sprinkler, or fusible link inspection or resetting and
for residue clean-out purposes, shall be equipped with tight-fitting covers provided with
substantial fasteners. [NFPA 45 6.5.9]
III.
b
. EXPLOSION-RESISTANT CONSTRUCTION [NFPA 45 5.2]
1. When explosion-resistant construction is used, adequately designed explosion resistance
shall be achieved by the use of one of the following methods:
a) Reinforced concrete walls
b) Reinforced and fully grouted concrete block walls
c) Steel walls
d) Steel plate walls with energy-absorbing linings
e) Barricades, such as those used for explosives operations, constructed of reinforced
concrete, sand-filled/wood-sandwich walls, wood-lined steel plate, or earthen or rock
berms
f) Specifically engineered construction assemblies [NFPA 45 5.2]
III.c.
MEASURING DEVICE FOR HOOD AIRFLOW [NFPA 45 6.8.7]
1. A measuring device for hood airflow shall be provided on each laboratory hood. And shall be
a permanently installed device and shall provide constant indication to the hood user of
adequate or inadequate hood airflow. [NFPA 45 6.8.7.1 and 6.8.7.2]
Page 3 of 11
Rev. 06/23/2006 IV. MEANS OF ACCESS TO AN EXIT [NFPA 45 3.4]
1. A second m