Heads up: There are no amended sections in this chapter.
ANNEXES A, B, C, D, E, F, G, H, I, & J
Adopting Agency BSC BSC-CG SFM HCD DSA OSHPD DPH
1 2 AC SS SS/CC 1 1R 2 3 4 5  
Adopt Entire Article                 X X X X X X  
Adopt entire Article as amended (amended sections listed below)                              
Adopt only those sections that are listed below     X                        
Article/Section
Annex A     X                        
Annex B     X                        

This informative annex is not a part of the requirements of this NFPA document but is included for informational purposes only.

Table E.1 contains the fire resistance rating, in hours, for Types I through V construction. The five different types of construction can be summarized briefly as follows (see also Table E.2):

Type I is a fire-resistive construction type. All structural elements and most interior elements are required to be noncombustible. Interior, nonbearing partitions are permitted to be 1 or 2 hour rated. For nearly all occupancy types, Type I construction can be of unlimited height.

Type II construction has three categories: fire-resistive, one-hour rated, and non-rated. The number of stories permitted for multifamily dwellings varies from two for non-rated and four for one-hour rated to 12 for fire-resistive construction.

Type III construction has two categories: one-hour rated and non-rated. Both categories require the structural framework and exterior walls to be of noncombustible material. One-hour rated construction requires all interior partitions to be one-hour rated. Non-rated construction allows nonbearing interior partitions to be of non-rated construction. The maximum permitted number of stories for multifamily dwellings and other structures is two for non-rated and four for one-hour rated.

Type IV is a single construction category that provides for heavy timber construction. Both the structural framework and the exterior walls are required to be noncombustible except that wood members of certain minimum sizes are allowed. This construction type is seldom used for multifamily dwellings but, if used, would be permitted to be four stories high.

Type V construction has two categories: one-hour rated and non-rated. One-hour rated construction requires a minimum of one-hour rated construction throughout the building. Non-rated construction allows non-rated interior partitions with certain restrictions. The maximum permitted number of stories for multifamily dwellings and other structures is two for non-rated and three for one-hour rated.

TABLE E.1 Fire Resistance Ratings for Type I Through Type V Construction (hr)

  Type I Type II Type III Type IV Type V
442 332 222 111 000 211 200 2HH 111 000
Exterior Bearing Walls a                    
Supporting more than one floor, columns, or other bearing walls 4 3 2 1 0b 2 2 2 1 0b
Supporting one floor only 4 3 2 1 0b 2 2 2 1 0b
Supporting a roof only 4 3 1 1 0b 2 2 2 1 0b
Interior Bearing Walls                    
Supporting more than one floor, columns, or other bearing walls 4 3 2 1 0 1 0 2 1 0
Supporting one floor only 3 2 2 1 0 1 0 1 1 0
Supporting roofs only 3 2 1 1 0 1 0 1 1 0
Columns                    
Supporting more than one floor, columns, or other bearing walls 4 3 2 1 0 1 0 H 1 0
Supporting one floor only 3 2 2 1 0 1 0 H 1 0
Supporting roofs only 3 2 1 1 0 1 0 H 1 0
Beams, Girders, Trusses, and Arches                    
Supporting more than one floor, columns, or other bearing walls 4 3 2 1 0 1 0 H 1 0
Supporting one floor only 2 2 2 1 0 1 0 H 1 0
Supporting roofs only 2 2 1 1 0 1 0 H 1 0
Floor/Ceiling Assemblies 2 2 2 1 0 1 0 H 1 0
Roof/Ceiling Assemblies 2 11/2 1 1 0 1 0 H 1 0
Interior Nonbearing Walls 0 0 0 0 0 0 0 0 0 0
Exterior Nonbearing Walls c 0b 0b 0b 0b 0b 0b 0b 0b 0b 0b
Source: Table 7.2.1.1 from NFPA 5000, Building Construction and Safety Code, 2012 edition.
H: Heavy timber members.
aSee 7.3.2.1 in NFPA 5000.
bSee Section 7.3 in NFPA 5000.
cSee 7.2.3.2.12, 7.2.4.2.3, and 7.2.5.6.8 in NFPA 5000.

TABLE E.2 Maximum Number of Stories for Types V, IV, and III Construction

Construction Type Maximum Number of Stories Permitted
V Non-rated 2
V Non-rated, Sprinklered 3
V One-Hour Rated 3
V One-Hour Rated, Sprinklered 4
IV Heavy Timber 4
IV Heavy Timber, Sprinklered 5
III Non-rated 2
III Non-rated, Sprinklered 3
III One-Hour Rated 4
III One-Hour Rated, Sprinklered 5

In Table E.1 the system of designating types of construction also includes a specific breakdown of the types of construction through the use of arabic numbers. These arabic numbers follow the roman numeral notation where identifying a type of construction [for example, Type I(442), Type II(111), Type III(200)] and indicate the fire resistance rating requirements for certain structural elements as follows:

  1. First arabic number — exterior bearing walls
  2. Second arabic number — columns, beams, girders, trusses and arches, supporting bearing walls, columns, or loads from more than one floor
  3. Third arabic number — floor construction

Table E.3 provides a comparison of the types of construction for various model building codes. [5000: A.7.2.1.1]

TABLE E.3 Cross-Reference of Building Construction Types

NFPA 5000 I (442) I (332) II (222) II (111) II
(000)
III (211) III (200) IV (2HH) V (111) V
(000)
UBC I FR II FR II 1 hr II N III 1 hr III N IV HT V 1 hr V N
B/NBC 1A 1B 2A 2B 2C 3A 3B 4 5A 5B
SBC I II IV 1 hr IV UNP V 1 hr V UNP III VI 1 hr VI UNP
IBC IA IB IIA IIB IIIA IIIB IV VA VB
Source: Table A.7.2.1.1 from NFPA 5000, Building Construction and Safety Code, 2012 edition.
UBC: Uniform Building Code.
FR: Fire rated.
N: Nonsprinklered.
HT: Heavy timber.
B/NBC: National Building Code.
SBC: Standard Building Code.
UNP: Unprotected.
IBC: International Building Code.
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