HomeMy WebLinkAboutBldg. Code RequirementsGENERAL BUILDING HEIGHTS AND AREAS
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TABLE 506.2'. b
ALLOWABLE AREA FACTOR (A,= NS, S1, S13R, or SM, as applicable) IN SQUARE FEET
OCCUPANCY
CLASSIFICATION
SEE FOOTNOTES
TYPE OF CONSTRUCTION
TYPE I
TYPE II
TYPE III
TYPE IV
TYPE V
A
B
A
B
A
B
HT
A
B
A-1
NS
UL _UL
15,500
8,500
14,000
8,500
15,000
11,500
5,500
S1
UL
UL
62,000
34,000
56,000
34,000
60,000
46,000
22,000
SM
UL
UL
46,500
25,500
42,000
25,500
45,000
34,500
16,500
A-2
NS
UL
UL
15,500
9,500
14,000
9,500
15,000
11,500
6,000
S1
UL
UL
62,000
38,000
56,000
38,000
60,000
46,000
24,000
SM
UL
UL
46,500
28,500
42,000
28,500
45,000
34,500
18,000
A-3
NS
UL
UL
15,500
9,500
14,000
9,500
15,000
11,500
6,000
S1
UL
UL
62,000
38,000
56,000
38,000
60,000
46,000
24,000
SM
UL
UL
46,500
28,500
42,000
28,500
45,000
34,500
18,000
A-4
NS
UL
UL
15,500
9,500
14,000
9,500 J
15,000
11,500
6,000
S1
UL
UL
62,000
38,000
56,000
38,000
60,000
46,000
24,000
SM
UL
UL
46,500
28,500
42,000
28,500
45,000
34,500
18,000
A-5
NS
UL
UL
UL
UL
UL
UL
UL
UL
UL
S1
SM
B
NS
UL
UL
37,500
23,000
28,500
19,000
36,000
18,000
9,000
S1
UL
UL
150,000
92,000
114,000
76,000
144,000
72,000
36,000
SM
UL
UL
112,500
69,000
85,500
57,000
108,000
54,000
27,000
E
NS
UL
UL
26,500
14,500
23,500
14,500
25,500
18,500
9.500
S1
UL
UL
106,000
58,000
94,000
58,000
102,000
74,000
38,000
SM
UL
UL
79,500
43,500
70,500
43,500
76,500
55,500
28,500
F-1
NS
UL
UL
25,000
15,500
19,000
12,000
33,500
14,000
8.500
S1
UL,UL
100,000
62,000
76,000
48,000
134,000
56,000
34,000
SM
UL
UL
75,000
46,500
57,000
36,000
100,500
42,000
25,500
F-2
NS
UL
UL
37,500
23,000
28,500
18,000
50,500
21,000
13,000
S1
UL
UL
150,000
92,000
114,000
72,000
202,000
84,000
52,000
SM
UL
UL
112,500
69,000
85,500
54,000
151,500
63,000
39,000
H-1
NS
21,000
16,500
11,000
7,000
9.500
7,000
10,500
7,500
NP
S1
H-2
NS`
21,000
16,500
11,000
7,000
9.500
7,000
10,500
7,500
3,000
S1
SM
H-3
NS`
UL
60,000
26,500
14,000
17,500
13,000
25,500
10,000
5,000
S1
SM
H-4
NS`.d
UL
UL
37,500
17,500
28,500
17,500
36,000
18,000
6,500
S1
UL
UL
150,000
70,000
114,000
70,000
144,000
72,000
26,000
SM
UL
UL
112,500
52,500
85,500
52,500
108,000
54,000
19,500
H-5
NS°'d
UL
UL
37,500
23,000
28,500
19,000
36,000
18,000
9,000
S1
UL
UL
150,000
92,000
114,000
76,000
144,000
72,000
36,000
SM
UL
UL
112,500
69,000
85,500
57,000
108000
54,000
27,000
(continued)
102
2015 INTERNATIONAL BUILDING CODE®
GENERAL BUILDING HEIGHTS AND AREAS
TABLE 504.48'
ALLOWABLE NUMBER OF STORIES ABOVE GRADE PLANE
OCCUPANCY CLASSIFICATION
TYPE OF CONSTRUCTION
SEE FOOTNOTES
TYPE I
TYPE II
TYPE III
TYPE IV
TYPE V
A
B
A
B
A
B
HT
A
B
A-1
NS
UL
5
3
2
3
2
3
2
1
S
UL
6
4
3
4
3
4
3
2
A-2
NS
UL
11
3
2
3
2
3
2
1
S
UL
12
4
3
4
3
4
3
2
A-3
NS
UL
11
3
2
3
2
3
2
1
S
UL
12
4
3
4
3
4
3
2
A-4
NS
UL
11
3
2
3
2
3
2
1
S
UL
12
4
3
4
3
4
3
2
A-5
NS
UL
UL
UL
UL
UL
UL
UL
UL
UL
S
UL
UL
UL
UL
UL
UL
UL
UL
UL
B
NS
UL
11
5
3
5
3
5
3
2
S
UL
12
6
4
6
4
6
4
3
E
NS
UL
5
3
2
3
2
3
1
1
S
UL
6
4
3
4
3
4
2
2
F-1
NS
UL
11
4
2
3
2
4
2
1
S
UL
12
5
3
4
3
5
3
2
F-2
NS
UL
11
5
3
4
3
5
3
2
S
UL
12
6
4
5
4
6
4
3
H-1
NS ea
1
1
1
1
1
1
1
1
NP
S
H-2
NS ea
UL
3
2
1
2
1
2
1
1
S
H-3
Nc• d
UL
6
4
2
4
2
4
2
1
S
H-4
NS"
UL
7
5
3
5
3
5
3
2
S
UL
8
6
4
6
4
6
4
3
H-5
ea
NS
4
4
3
3
3
3
3
3
2
S
I-1 Condition 1
NSd'e
UL
9
4
3
4
3
4
3
2
S
UL
10
5
4
5
4
5
4
3
I-1 Condition 2
NSd. e
UL
9
4
3
4
3
4
3
2
S
UL
10
5
1-2
NSar
UL
4
2
1
1
NP
1
1
NP
S
UL
5
3
I-3
NSd' e
UL
4
2
1
2
1
2
2
1
S
UL
5
3
2
3
2
3
3
2
I-4
NSd. g
UL
5
3
2
3
2
3
1
1
S
UL
6
4
3
4
3
4
2
2
M
NS
UL
11
4
2
4
2
4
3
1
S
UL
12
5
3
5
3
5
4
2
(continued)
2015 INTERNATIONAL BUILDING CODE®
99
11111 rd11aIthG 11PailIieliMI'I r K'� h II111
Recep!iont3: 911942
09!2812019 09:36:47 AM Jean Alberioo
5 or 9 Reo Fea:$O.00 Dec Fee:0.00 GARFIELD COUNTY CO
TABLE A
ALLOWABLE FLOOR AREA
FOR BUILDINGS
Building Type
Maximum
Floor Area
III -B, V -B
7,500
V-A, II -B
9,000
Il -A, III -A, IV -HT, I -A,
I -B
12,000
40.14411- .spritikkv9)
*A-Protected/B-Unprotected H.T.-Heavy Timber(per Sec
602 IBC)
3. Whenever any addition to an existing
building causes the total floor area of
the building to exceed the limits set
forth in the preceding item number 2, the
entire building shall be provided with an
approved automatic sprinkler system or a
firewall conforming to Section 706 of the
International Building Code (IBC) must be
installed. Openings in these walls shall
conform to the (IBC) and be controlled by
actuation of a smoke detector. When the
automatic -closing fire assembly is
installed in a building with an approved
fire detection system, the fire assembly
actuating smoke detectors shall be a part
of the fire detection.
4. Existing structures and facilities. When
in any 24 month period the floor area of
an alteration, remodel or modification to
any existing building exceeds forty
percent (40%) of the floor area of the
building being improved, the entire
building shall be made to comply with the
requirements of Chapter 9 of the 2015
International Building Code, and the 2015
International Fire Code, as amended and
adopted by the Board of County
Commissioners of Garfield County,
Colorado.
6
i
i
MEANS OF EGRESS
out with an automatic sprinkler system in accor-
dance with Section 903.3.1.1 or 903.3.1.2 and the
common path of egress travel does not exceed
125 feet (38 100 mm).
2. Care suites in Group I-2 occupancies complying
with Section 407.4.
1006.2.1.1 Three or more exits or exit access door-
ways. Three exits or exit access doorways shall be pro-
vided from any space with an occupant load of 501 to
1,000. Four exits or exit access doorways shall be pro-
vided from any space with an occupant load greater
than 1,000.
1006.2.2 Egress based on use. The numbers of exits or
access to exits shall be provided in the uses described in
Sections 1006.2.2.1 through 1006.2.2.5.
1006.2.2.1 Boiler, incinerator and furnace rooms.
Two exit access doorways are required in boiler, incin-
erator and furnace rooms where the area is over 500
square feet (46 m2) and any fuel -fired equipment
exceeds 400,000 British thermal units (Btu) (422 000
KJ) input capacity. Where two exit access doorways are
required, one is permitted to be a fixed ladder or an
alternating tread device. Exit access doorways shall be
separated by a horizontal distance equal to one-half the
length of the maximum overall diagonal dimension of
the room.
1006.2.2.2 Refrigeration machinery rooms. Machin-
ery rooms larger than 1,000 square feet (93 m2) shall
have not less than two exits or. exit access doorways.
Where two exit access doorways are required, one such
doorway is permitted to be served by a fixed ladder or
an alternating tread device. Exit access doorways shall
be separated by a horizontal distance equal to one-half
the maximum horizontal dimension of the room.
All portions of machinery rooms shall be within 150
feet (45 720 mm) of an exit or exit access doorway. An
increase in exit access travel distance is permitted in
accordance with Section 1017.1.
Doors shall swing in the direction of egress travel,
regardless of the occupant load served. Doors shall be
tight fitting and self-closing.
1006.2.2.3 Refrigerated rooms or spaces. Rooms or
spaces having a floor area larger than 1,000 square feet
(93 m2), containing a refrigerant evaporator and main-
tained at a temperature below 68°F (20°C), shall have
access to not less than two exits or exit access door-
ways.
Exit access travel distance shall be determined as
specified in Section 1017.1, but all portions of a refrig-
erated room or space shall be within 150 feet (45 720
mm) of an exit or exit access doorway where such
rooms are not protected by an approved automatic
TABLE 1006.2.1
SPACES WITH ONE EXIT OR EXIT ACCESS DOORWAY
OCCUPANCY
MAXIMUM OCCUPANT
LOAD OF SPACE
MAXIMUM COMMON PATH OF EGRESS TRAVEL DISTANCE (feet)
Without Sprinkler System
(feet)
With Sprinkler System
(feet)
Occupant Load
OL 5 30
OL > 30
A`, E, M
49
75
75
75'
B
49
100
75
100'
F
49
75
75
100'
H-1, H-2, H-3
3
NP
NP
25b
H-4, H-5
10
NP
NP
75b
I-1, I-2°, I-4
10
NP
NP
75'
I-3
10
NP
NP
100'
R-1
10
NP
NP
75'
R-2
10
NP
NP
125'
R-3'
10
NP
NP
125'
R-4'
10
75
75
125'
St
29
100
75
100'
U
49
100
75
75'
For SI: 1 foot = 304.8 mm.
NP = Not Permitted.
a. Buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2. See Section 903 for occupancies where
automatic sprinkler systems are permitted in accordance with Section 903.3.1.2.
b. Group H occupancies equipped throughout with an automatic sprinkler system in accordance with Section 903.2.5.
c. For a room or space used for assembly purposes having fixed seating, see Section 1029.8.
d. For the travel distance limitations in Group I-2, see Section 407.4.
e. The length of common path of egress travel distance in a Group R-3 occupancy located in a mixed occupancy building or within a Group R-3 or R-4
congregate living facility.
f. The length of common path of egress travel distance in a Group S-2 open parking garage shall be not more than 100 feet.
254
2015 INTERNATIONAL BUILDING CODE®
i
I
MEANS OF EGRESS
1006.3.2(1) or 1006.3.2(2) for that occupancy. Where
applicable, cumulative occupant loads from adjacent
occupancies shall be considered in accordance with the
provisions of Section 1004.1. In each story of a mixed
occupancy building, the maximum number of occu-
pants served by a single exit shall be such that the sum
of the ratios of the calculated number of occupants of
the space divided by the allowable number of occu-
pants indicated in Table 1006.3.2(2) for each occu-
pancy does not exceed one. Where dwelling units are
located on a story with other occupancies, the actual
number of dwelling units divided by four plus the ratio
from the other occupancy does not exceed one.
1006.3.2.2 Basements. A basement provided with one
exit shall not be located more than one story below
grade plane.
SECTION 1007
EXIT AND EXIT ACCESS
DOORWAY CONFIGURATION
1007.1 General. Exits, exit access doorways, and exit access
stairways and ramps serving spaces, including individual
building stories, shall be separated in accordance with the
provisions of this section.
1007.1.1 Two exits or exit access doorways. Where two
exits, exit access doorways, exit access stairways or
ramps, or any combination thereof, are required from any
portion of the exit access, they shall be placed a distance
apart equal to not less than one-half of the length of the
maximum overall diagonal dimension of the building or
area to be served measured in a straight line between them.
Interlocking or scissor stairways shall be counted as one
exit stairway.
Exceptions:
1. Where interior exit stairways or ramps are inter-
connected by a 1 -hour fire -resistance -rated corri-
dor conforming to the requirements of Section
1006.3.2(2)
STORIES WITH ONE EXIT OR ACCESS TO ONE EXIT FOR OTHER OCCUPANCIES
1020, the required exit separation shall be mea-
sured along the shortest direct line of travel
within the corridor.
2. Where a building is equipped throughout with an
automatic sprinkler system in accordance with
Section 903.3.1.1 or 903.3.1.2, the separation dis-
tance shall be not less than one-third of the length
of the maximum overall diagonal dimension of
the area served.
1007.1.1.1 Measurement point. The separation dis-
tance required in Section 1007.1.1 shall be measured in
accordance with the following:
1. The separation distance to exit or exit access
doorways shall be measured to any point along
the width of the doorway.
2. The separation distance to exit access stairways
shall be measured to the closest riser.
3. The separation distance to exit access ramps shall
be measured to the start of the ramp run.
1007.1.2 Three or more exits or exit access doorways.
Where access to three or more exits is required, not less
than two exit or exit access doorways shall be arranged in
accordance with the provisions of Section 1007.1.1. Addi-
tional required exit or exit access doorways shall be
arranged a reasonable distance apart so that if one
becomes blocked, the others will be available.
1007.1.3 Remoteness of exit access stairways or ramps.
Where two exit access stairways or ramps provide the
required means of egress to exits at another story, the
required separation distance shall be maintained for all
portions of such exit access stairways or ramps.
1007.1.3.1 Three or more exit access stairways or
ramps. Where more than two exit access stairways or
ramps provide the required means of egress, not less
than two shall be arranged in accordance with Section
1007.1.3.
STORY
OCCUPANCY
MAXIMUM OCCUPANT
LOAD PER STORY
MAXIMUM COMMON PATH OF
EGRESS TRAVEL DISTANCE
(feet)
First story above or below grade plane
A, Bb, E Fb, M, U
49
75
H-2, H-3
3
25
H-4, H-5, I, R-1, R-2'.`, R-4
10
75
S+b, d
29
75
Second story above grade plane
B, F, M, Sd
29
75
Third story above grade plane and higher
NP
NA
NA
For SI: 1 foot = 304.8 mm.
NP = Not Permitted.
NA = Not Applicable.
a. Buildings classified as Group R-2 equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2 and provided
with emergency escape and rescue openings in accordance with Section 1030.
b. Group B, F and S occupancies in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 shall have a
maximum exit access travel distance of 100 feet.
c. This table is used for R-2 occupancies consisting of sleeping units. For R-2 occupancies consisting of dwelling units, use Table 1006.3.2(1).
d. The length of exit access travel distance in a Group S-2 open parking garage shall be not more than 100 feet.
256
2015 INTERNATIONAL BUILDING CODE®