Table A.10.2.2 Interior Finish Classification Limitations

Table A.10.2.2 Interior Finish Classification Limitations
Occupancy	Exits	Exit Access Corridors	Other Spaces
Assembly >300 occupant load	A	A or B	A or B
Assembly >300 occupant load	I or II	I or II	NA
Assembly ≤300 occupant load	A	A or B	A, B, or C
Assembly ≤300 occupant load	I or II	I or II	NA
Educational — New	A	A or B	A or B; C on low partitions†
Educational — New	I or II	I or II	NA
Day-Care Centers — New	A	A	A or B
Day-Care Centers — New	I or II	I or II	NA
Day-Care Homes — New	A or B	A or B	A, B, or C
Day-Care Homes — New	I or II		NA
Health Care — New	A	A	A
	NA	B on lower portion of corridor wall†	B in small individual rooms†
	I or II	I or II	NA
Detention and Correctional — New (sprinklers mandatory)	A or B	A or B	A,B,or C
Detention and Correctional — New (sprinklers mandatory)	I or II	I or II	NA
One- and Two-Family Dwellings and Lodging or Rooming Houses	A, B, or C	A, B, or C	A, B, or C
Hotels and Dormitories — New	A	A or B	A,B,or C
Hotels and Dormitories — New	I or II	I or II	NA
Apartment Buildings — New	A	A or B	A,B,or C
Apartment Buildings — New	I or II	I or II	NA
Residential Board and Care — (See Chapters 32 and 33.)
Mercantile — New	A or B	A or B	A or B
Mercantile — New	I or II		NA
Business and Ambulatory Health Care — New	A or B	A or B	A,B,or C
Business and Ambulatory Health Care — New	I or II		NA
Industrial	A or B	A,B,or C	A,B,or C
Industrial	I or II	I or II	NA
Storage	A or B	A,B,or C	A,B,or C
Storage	I or II		NA

NA: Not applicable.

Notes:

(1) Class A interior wall and ceiling finish — flame spread, 0–25 (new applications), smoke developed, 0–450.
(2) Class B interior wall and ceiling finish — flame spread, 26–75 (new applications), smoke developed, 0–450.
(3) Class C interior wall and ceiling finish — flame spread, 76–200 (new applications), smoke developed, 0–450.
(4) Class I interior floor finish — critical radiant flux,not less than 0.45 W/cm2.
(5) Class II interior floor finish — critical radiant flux,not more than 0.22 W/cm2, but less than 0.45 W/cm2.
(6) Automatic sprinklers — where a complete standard system of automatic sprinklers is installed, interior wall and ceiling finish with a flame spread rating not exceeding Class C is permitted to be used in any location where Class B is required and with a rating of Class B in any location where Class A is required; similarly, Class II interior floor finish is permitted to be used in any location where Class I is required,and no criticalradiant flux rating is required where Class II is required. These provisions do not apply to new detention and correctional occupancies.
(7) Exposed portions of structural members complying with the requirements for heavy timber construction arepermitted.†See corresponding chapters for details.

TableA.10.2Fire Testing of Interior Finish Materials
Material	Test Method	Acceptance Criterion	Application Requirement	Section
Interior wall and ceilingfinish materials,exceptas shown in this table	ASTM E 84 or ANSI/UL723	Class A,in accordance with 10.2.3.4 (1)	As required by relevantsections	10.2.3
	ASTM E 84 or ANSI/UL723	Class B,in accordance with 10.2.3.4 (2)	As required by relevantsections	10.2.3
	ASTM E 84 or ANSI/UL723	Class C,in accordance with 10.2.3.4 (3)	As required by relevantsections	10.2.3
	NFPA 286	In accordance with10.2.3.7.2	Permitted where Class A,B,or C is required byrelevant sections	10.2.3.2
Materials having thickness < 1/28 in. (0.90 mm) applied directly to the surface of walls or ceilings	No testing required			10.2.1.2
Exposed portions of structural members complying with requirements for buildings of Type IV (2HH) construction in accordance with NFPA220	No testing required			10.2.3.1
Cellular or foamed plastics(exposed foamed plasticsand foamed plastics usedin conjunction withtextile or vinyl facing orcover)	NFPA 286	In accordance with10.2.3.7.2	Permitted where Class A,B,or C is required byrelevant sections	10.2.4.3.1.1(1)
	ANSI/UL 1715	Pass	Permitted where Class A,B,or C is required byrelevant sections	10.2.4.3.1.1(2)
	ANSI/UL 1040	Pass	Permitted where Class A,B,or C is required byrelevant sections	10.2.4.3.1.1(3)
	FM 4880	Pass	Permitted where Class A,B,or C is required byrelevant sections	10.2.4.3.1.1(4)
	Suitable large-scale fire test that substantiates combustibility characteristics for use intended under actual fire conditions	Pass	Permitted where Class A,B,or C is required byrelevant sections	10.2.4.3.1
Textile wall coverings	NFPA 286	In accordance with 10.2.3.7.2	Permitted where Class A, B, or C is required by relevant sections	10.2.4.1(6)
	NFPA 265, Method B	In accordance with 10.2.3.7.1	Permitted on walls and partitions	10.2.4.1(5)
	ASTM E 84 or ANSI/UL 723	Class A, in accordance with 10.2.3.4 (1)	Permitted on walls, but also requires sprinklers per Section 9.7	10.2.4.1(1)
	ASTM E 84 or ANSI/UL723	Class A, in accordance with 10.2.3.4 (1)	Permitted on partitions not exceeding three-quarters of the floor-to-ceiling height or not exceeding 8ft (2440 mm) in height, whichever is less	10.2.4.1(2)
	ASTM E 84 or ANSI/UL723	Class A, in accordance with 10.2.3.4 (1)	Permitted to extend not more than 48 in. (1220 mm) above finished floor on ceiling-height walls and ceiling-height partitions	10.2.4.1(3)
	ASTM E 84 or ANSI/UL723	Class A,in accordancewith 10.2.3.4 (1)	Previously approved existing installations of textile material having a Class A rating permitted to be continued to be used	10.2.4.1(4)
Expanded vinyl wall coverings	NFPA 286	In accordance with10.2.3.7.2	Permitted where Class A,B,or C is required byrelevant sections	10.2.4.2(6)
	NFPA 265,Method B	In accordance with10.2.3.7.1	Permitted on walls andpartitions	10.2.4.2(5)
	ASTM E 84 or ANSI/UL723	Class A, in accordance with 10.2.3.4 (1)	Permitted on walls,but also requires sprinklers per Section 9.7	10.2.4.2(1)
	ASTM E 84 or ANSI/UL723	Class A,in accordancewith 10.2.3.4 (1)	Permitted on partitions not exceeding three-quartersof the floor-to-ceiling height or not exceeding 8ft (2440 mm) in height,whichever is less	10.2.4.2(2)
	ASTM E 84 or ANSI/UL723	Class A,in accordancewith 10.2.3.4 (1)	Permitted to extend not morethan 48 in. (1220 mm)above finished floor onceiling-height walls andceiling-height partitions	10.2.4.2(3)
	ASTM E 84 or ANSI/UL723	Class A,B,or C,inaccordance with 10.2.3.4	Existing installations ofmaterials with appropriatewall finish classificationfor occupancy involved,and with classification inaccordance with theprovisions of 10.2.3.4	10.2.4.2(4)
Textile ceiling coverings	NFPA 286	In accordance with10.2.3.7.2	Permitted where Class A,B,or C is required byrelevant sections	10.2.4.1(6)
	ASTM E 84 or ANSI/UL723	Class A,in accordancewith 10.2.3.4 (1)	Permitted on walls,but alsorequires sprinklers perSection 9.7	10.2.4.1(1)
	ASTM E 84 or ANSI/UL723	Class A,in accordancewith 10.2.3.4 (1)	Previously approved existinginstallations of textilematerial having a Class Arating permitted to becontinued to be used	10.2.4.1(4)
Expanded vinyl ceilingcoverings	NFPA 286	In accordance with10.2.3.7.2	Permitted where Class A,B,or C is required byrelevant sections	10.2.4.2(6)
	ASTM E 84 or ANSI/UL723	Class A,in accordancewith 10.2.3.4 (1)	Permitted on walls,but alsorequires sprinklers perSection 9.7	10.2.4.2(1)
	ASTM E 84 or ANSI/UL723	Class A,B,or C,inaccordance with 10.2.3.4	Existing installations ofmaterials with appropriatewall finish classificationfor occupancy involved,and with classification inaccordance with theprovisions of 10.2.3.4	10.2.4.2(4)
Interior trim,other thanfoamed plastic andother than wall base	ASTM E 84 or ANSI/UL723	Class C,in accordancewith 10.2.3.4	Interior wall and ceiling trimand incidental finish,otherthan wall base not inexcess of 10 percent of theaggregate wall and ceilingareas of any room or spacewhere interior wall andceiling finish of Class A orClass B is required	10.2.5.1
	NFPA 286	In accordance with10.2.3.7.2	Permitted where Class A,B,or C is required byrelevant sections	10.2.3.2
Foamed plastic used asinterior trim	ASTM E 84 or ANSI/UL723	Flame spread index ≤75	(1) Minimum density ofinterior trim required tobe 20 lb/ft3(320 kg/m3) (2) Maximum thickness ofinterior trim required tobe 1/2in. (13 mm),andmaximum width requiredto be 4 in. (100 mm) (3) Interior trim notpermitted to constitutemore than 10 percent ofthe wall or ceiling areaof a room or space	10.2.4.3.2 10.2.4.3.2 10.2.4.3.2
Foamed plastic used asinterior trim	NFPA 286	In accordance with10.2.3.7.2	Permitted where Class A,B,or C is required byrelevant sections	10.2.3.2
Fire-retardant coatings	NFPA 703	Class A,B,or C,when tested by ASTM E 84 orANSI/UL 723,inaccordance with 10.2.3.4	Required flame spread orsmoke developmentclassification of existingsurfaces of walls,partitions,columns,andceilings permitted to besecured by applyingapproved fire-retardantcoatings to surfaces havinghigher flame spread ratingsthan permitted; suchtreatments required to betested,or listed and labeledfor application to materialto which they are applied	10.2.6.1
Carpet and carpetlikeinterior floor finishes	ASTM D 2859	Pass	All areas	10.2.7.1
Floor coverings,otherthan carpet,judged torepresent an unusualhazard (excludingtraditional finish floorsand floor coverings,such as wood flooringand resilient floorcoverings)	NFPA 253	Critical radiant flux ≥0.1W/cm2	All areas	10.2.7.2
Interior floor finish,otherthan carpet andcarpetlike materials	NFPA 253	Class I:Critical radiantflux ≥0.45 W/cm2,inaccordance with 10.2.7.4	As required by relevantsections	10.2.7.3
	NFPA 253	Class II:Critical radiantflux ≥0.22 W/cm2,inaccordance with 10.2.7.4	As required by relevantsections	10.2.7.3
Wall base [interior floor trim material used at junction of wall and floor to provide a functional or decorative border, and not exceeding 6 in. (150mm) in height]	NFPA 253	Class II:Critical radiantflux ≥0.22 W/cm2,inaccordance with 10.2.7.4	All areas	10.2.5.2
	NFPA 253	Class I:Critical radiantflux ≥0.45 W/cm2,inaccordance with 10.2.7.4	If interior floor finish isrequired to meet Class Icritical radiant flux	10.2.5.2
Floor finish of traditionaltype,such as woodflooring and resilientfloor coverings	No testing required			10.2.2.2