Page 83 - ICC IEBC 2018

PERFORMANCE COMPLIANCE METHODS

1301.6.4.1 Categories. The categories for tenant and 3. Category c—1-hour to less than 2-hour fire-resis-
dwelling unit separations are: tance rating, with doors conforming to Section
1. Category a—No fire partitions; incomplete fire 716 of the International Building Code or with-
partitions; no doors; doors not self-closing or out corridors as permitted by Section 1020 of the
automatic-closing. International Building Code.
2. Category b—Fire partitions or floor assemblies 4. Category d—2-hour or greater fire-resistance rat-
with less than 1-hour fire-resistance ratings or not ing, with doors conforming to Section 716 of the
constructed in accordance with Section 708 or International Building Code.
711 of the International Building Code, respec- 1301.6.6 Vertical openings. Evaluate the fire-resistance
tively.
rating of interior exit stairways or ramps, hoistways, esca-
3. Category c—Fire partitions with 1-hour or lator openings, and other shaft enclosures within the build-
greater fire-resistance ratings constructed in ing, and openings between two or more floors. Table
accordance with Section 708 of the International 1301.6.6(1) contains the appropriate protection values.
Building Code and floor assemblies with 1-hour Multiply that value by the construction-type factor found
but less than 2-hour fire-resistance ratings con- in Table 1301.6.6(2). Enter the vertical opening value and
structed in accordance with Section 711 of the its sign (positive or negative) in Table 1301.7 under Safety
International Building Code or with only one Parameter 1301.6.6, Vertical Openings, for fire safety,
tenant within the floor area.
means of egress, and general safety. If the structure is a
4. Category d—Fire barriers with 1-hour but less one-story building or if all the unenclosed vertical open-
than 2-hour fire-resistance ratings constructed in ings within the building conform to the requirements of
accordance with Section 707 of the International Section 713 of the International Building Code, enter a
Building Code and floor assemblies with 2-hour value of 2. The maximum positive value for this require-
or greater fire-resistance ratings constructed in ment (VO) shall be 2.
accordance with Section 711 of the International
Building Code. TABLE 1301.6.6(1)
VERTICAL OPENING PROTECTION VALUE
5. Category e—Fire barriers and floor assemblies
PROTECTION VALUE
with 2-hour or greater fire-resistance ratings and
constructed in accordance with Sections 707 and None (unprotected opening) -2 times number of floors connected
711 of the International Building Code, respec- Less than 1 hour -1 times number of floors connected
tively.
1 to less than 2 hours 1
1301.6.5 Corridor walls. Evaluate the fire-resistance rat- 2 hours or more 2
ing and degree of completeness of walls which create cor-
ridors serving the floor and that are constructed in TABLE 1301.6.6(2)
accordance with Section 1020 of the International Build- CONSTRUCTION-TYPE FACTOR
ing Code. This evaluation shall not include the wall ele- F TYPE OF CONSTRUCTION
ments considered under Sections 1301.6.3 and 1301.6.4. A IA IB IIA IIB IIIA IIIB IV VA VB
Under the categories and groups in Table 1301.6.5, deter- C
T
mine the appropriate value and enter that value into Table O 1.2 1.5 2.2 3.5 2.5 3.5 2.3 3.3 7
1301.7 under Safety Parameter 1301.6.5, Corridor Walls, R
for fire safety, means of egress, and general safety.
TABLE 1301.6.5 1301.6.6.1 Vertical opening formula. The following
CORRIDOR WALL VALUES formula shall be used in computing vertical opening
CATEGORIES value.
OCCUPANCY
a b c a d a
VO = PV × CF (Equation 13-5)
A-1 -10 -4 0 2
where:
A-2 -30 -12 0 2
VO = Vertical opening value. The calculated value
A-3, F, M, R, S-1 -7 -3 0 2
shall not be greater than positive 2.0.
A-4, B, E, S-2 -5 -2 0 5
PV = Protection value from Table 1301.6.6.(1).
I-2 -10 0 1 2
CF = Construction-type factor from Table 1301.6.6.(2).
a. Corridors not providing at least one-half the exit access travel distance for
all occupants on a floor shall use Category b. 1301.6.7 HVAC systems. Evaluate the ability of the
HVAC system to resist the movement of smoke and fire
1301.6.5.1 Categories. The categories for corridor
walls are: beyond the point of origin. Under the categories in Section
1301.6.7.1, determine the appropriate value and enter that
1. Category a—No fire partitions; incomplete fire value into Table 1301.7 under Safety Parameter 1301.6.7,
partitions; no doors; or doors not self-closing.
HVAC Systems, for fire safety, means of egress, and gen-
2. Category b—Less than 1-hour fire-resistance rat- eral safety. Facilities in Group I-2 occupancies meeting
ing or not constructed in accordance with Section Category a, b or c shall be considered to fail the evalua-
708.4 of the International Building Code. tion.
64 2018 INTERNATIONAL EXISTING BUILDING CODE ®
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