D.C. Mun. Regs. tit. 12, r. 12-A504

Current through Register Vol. 71, No. 49, December 6, 2024

Rule 12-A504 - BUILDING HEIGHT AND NUMBER OF STORIES

Strike Occupancy Classifications A-2, A-3, B, M, R-1, R-2, R-3, R-4, S-1 and S-2 in Table 504.4 of the International Building Code in their entirety and insert new Occupancy Classifications A-2, A-3, B, M, R-1, R-2, R-3, R-4, S-1 and S-2 in Table 504.4 of the Building Code in their place to read as follows:

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-2	NS	UL	11	3	2	3	2	3	2	1
	S	UL	13	4	3	4	3	4	3	2
A-3	NS	UL	11	3	2	3	2	3	2	1
	S	UL	13	4	3	4	3	4	3	2
B	NS	UL	11	5	4	5	4	5	3	2
	S	UL	13	6	5	6	5	6	4	3
M	NS	UL	11	4	4	4	4	4	3	1
	S	UL	12	5	5	5	5	5	4	2

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	d, h NS	UL	11	4	4	4	4	4	3	2
	S13R	4	4						4	3
	S	UL	13	5	5	5	5	5	4	3
R-2	d, h NS	UL	11	4	4	4	4	4	3	2
	S13R	4	4	4					4	3
	S	UL	13	5	5	5	5	5	4	3
R-3	d, h NS	UL	11	4	4	4	4	4	3	3
	S13R	4	4						4	4
	S	UL	13	5	5	5	5	5	4	4
R-4	d, h NS	UL	11	4	4	4	4	4	3	2
	S13R	4	4						4	3
	S	UL	13	5	5	5	5	5	4	3
S-1	NS	UL	11	4	3	3	3	4	3	1
	S	UL	12	5	4	4	4	5	4	2
S-2	NS	UL	11	5	4	4	4	4	4	2
	S	UL	12	6	5	5	5	5	5	3

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.

D.C. Mun. Regs. tit. 12, r. 12-A504

Final Rulemaking published at 67 DCR 5679 (5/29/2020)