The maximum number of stories of a building shall not exceed the limits specified in Table 504.4.
TABLE 504.4a, b ALLOWABLE NUMBER OF STORIES ABOVE GRADE PLANE
(continued)
TABLE 504.4a, b‒continued ALLOWABLE NUMBER OF STORIES ABOVE GRADE PLANE
TABLE 504.4a, b 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 | NSc, d | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | NP |
S | ||||||||||
H-2 | NSc, d | UL | 3 | 2 | 1 | 2 | 1 | 2 | 1 | 1 |
S | ||||||||||
H-3 | NSc, d | UL | 6 | 4 | 2 | 4 | 2 | 4 | 2 | 1 |
S | ||||||||||
H-4 | NSc, d | UL | 7 | 5 | 3 | 5 | 3 | 5 | 3 | 2 |
S | UL | 8 | 6 | 4 | 6 | 4 | 6 | 4 | 3 | |
H-5 | NSc, d | 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 | |||||||
I-2 | NSd, f | 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)
TABLE 504.4a, b‒continued 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 | ||
R-1 | NSd, h | UL | 11 | 4 | 4 | 4 | 4 | 4 | 3 | 2 |
S13R | 4 | 4 | 4 | 3 | ||||||
S | UL | 12 | 5 | 5 | 5 | 5 | 5 | 4 | 3 | |
R-2 | NSd, h | UL | 11 | 4 | 4 | 4 | 4 | 4 | 3 | 2 |
S13R | 4 | 4 | 4 | 4 | 3 | |||||
S | UL | 12 | 5 | 5 | 5 | 5 | 5 | 4 | 3 | |
R-3 | NSd, h | UL | 11 | 4 | 4 | 4 | 4 | 4 | 3 | 3 |
S13R | 4 | 4 | 4 | 4 | ||||||
S | UL | 12 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | |
R-4 | NSd, h | UL | 11 | 4 | 4 | 4 | 4 | 4 | 3 | 2 |
S13R | 4 | 4 | 4 | 3 | ||||||
S | UL | 12 | 5 | 5 | 5 | 5 | 5 | 4 | 3 | |
S-1 | NS | UL | 11 | 4 | 2 | 3 | 2 | 4 | 3 | 1 |
S | UL | 12 | 5 | 3 | 4 | 3 | 5 | 4 | 2 | |
S-2 | NS | UL | 11 | 5 | 3 | 4 | 3 | 4 | 4 | 2 |
S | UL | 12 | 6 | 4 | 5 | 4 | 5 | 5 | 3 | |
U | NS | UL | 5 | 4 | 2 | 3 | 2 | 4 | 2 | 1 |
S | UL | 6 | 5 | 3 | 4 | 3 | 5 | 3 | 2 |
Note: UL = Unlimited; NP = Not Permitted; NS = Buildings not equipped throughout with an automatic sprinkler system; S = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.2. |
a. See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter. |
b. See Section 903.2 for the minimum thresholds for protection by an automatic sprinkler system for specific occupancies. |
c. New Group H occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.5. |
d. The NS value is only for use in evaluation of existing building height in accordance with the International Existing Building Code. |
e. New Group I-1 and I-3 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6. For new Group I-1 occupancies, Condition 1, see Exception 1 of Section 903.2.6. |
f. New and existing Group I-2 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6 and Section 1103.5 of the International Fire Code. |
g. For new Group I-4 occupancies, see Exceptions 2 and 3 of Section 903.2.6. |
h. New Group R occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.8. |