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The Building Code Blog
IBC Allowable Height, Area and Number of Stories
Description
Reference
Value
Unit
Code Edition
IBC
2015
2018
2021
-
Design Inputs
Occupancy 1
(IBC Chapter 3)
A-1
A-2
A-3
A-4
A-5
B
E
F-1
F-2
H-1
H-2
H-3
H-4
H-5
I-1 Condition 1
I-1 Condition 2
I-2 Condition 1
I-2 Condition 2
I-3
I-4
M
R-1
R-2
R-3
R-4
S-1
S-2
U
-
Occupancy 2
(IBC Chapter 3)
-
A-1
A-2
A-3
A-4
A-5
B
E
F-1
F-2
H-1
H-2
H-3
H-4
H-5
I-1 Condition 1
I-1 Condition 2
I-2 Condition 1
I-2 Condition 2
I-3
I-4
M
R-1
R-2
R-3
R-4
S-1
S-2
U
-
Occupancy 3
(IBC Chapter 3)
-
A-1
A-2
A-3
A-4
A-5
B
E
F-1
F-2
H-1
H-2
H-3
H-4
H-5
I-1 Condition 1
I-1 Condition 2
I-2 Condition 1
I-2 Condition 2
I-3
I-4
M
R-1
R-2
R-3
R-4
S-1
S-2
U
-
Occupancy 4
(IBC Chapter 3)
-
A-1
A-2
A-3
A-4
A-5
B
E
F-1
F-2
H-1
H-2
H-3
H-4
H-5
I-1 Condition 1
I-1 Condition 2
I-2 Condition 1
I-2 Condition 2
I-3
I-4
M
R-1
R-2
R-3
R-4
S-1
S-2
U
-
Construction Type
(IBC 601)
[Dynamic Dropdown]
-
Sprinklers
(IBC 903.3)
NFPA 13
NFPA 13R
None
-
Proposed Number of Stories
(IBC 202)
Stories
IBC Limitations
Assume No Frontage Increase (
I
f
= 0)
Allowable Area Per Story
(IBC Table 506.2)
SF
Allowable Total Building Area
(IBC Equation 5-2 and 5-3)
SF
Assume Full Frontage Increase (
I
f
= 0.75)
Allowable Area Per Story
(IBC Table 506.2)
SF
Allowable Total Building Area
(IBC Equation 5-2 and 5-3)
SF
Maximum Height
(IBC Table 504.3)
Feet
Max Number of Stories
(IBC Table 504.4)
Stories
Notes
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