13-56-280 Mixed occupancy – Fire-resistive separations required.

   Each occupancy in a building of mixed occupancy shall be separated horizontally and vertically from any adjoining occupancy by construction materials providing fire resistance as established in Table 13-56-280 as set out in this section. Separation between Type III schools and A, B, C-1, C-2, and E occupancies, except day care centers with children less than two years of age, may be reduced to one hour. Separation between Type III schools with children less than two years of age and A, B, C-2, E and F occupancies may be reduced to two hours.

   Separation in buildings of mixed occupancies may be reduced by one hour from the fire resistance requirements as established in Table 13-56-280 as set out in this section when the building is equipped throughout with an approved automatic sprinkler system which is supervised except that separations between day care centers with children less than two years of age and A, B, C, C-1, C-2, E and F occupancies shall not be reduced to less than two hours.

(Prior code § 48-12.5; Amend Coun. J. 9-13-89, p. 4604; Amend Coun. J. 7-14-93, p. 35324; Amend Coun. J. 10-30-96, p. 31214)

Table 13-56-280 REQUIRED SEPARATIONS IN BUILDINGS OF MIXED OCCUPANCY Fire Resistive Ratings in Hours
Occupancy Classification		A	B	C-1	C-2	C-3	D	E	F	G	H-1 H-2	H-3	I
A.	Residential		3	4	2	4	4	1(d)	1	4	4	4	(b)
B.	Institutional	3		4	4	3	4	4	4(c)	(b)	4(c)	4(c)	(b)
C-1.	Large assembly	4	4		4	4	4	4	4	4(c)	4(c)	4(c)	(b)
C-2.	Small assembly	2	4	4		4	2	2(d)	2	4	4	4	(b)
C-3.	Schools	4	3	4	4	(e)	4	2(d)	4	4(c)	4(c)	4(c)	(b)
D.	Open air assembly	4	4	4	2	4		4	4	4	4	4	(b)
E.	Business	1(d)	4	4	2(d)	2(d)	4(d)	(d)	(a)(d)	(a)(d)	(a)(d)	2(d)	4
F.	Mercantile	1	4(c)	4	2	4	4	(a)		3	(a)	3	(b)
G.	Industrial	4	(b)	4(c)	4	4(c)	4	(a)(d)	3		(a)	4	4
H-1 & H-2.	Storage	4	4(c)	4(c)	4	4(c)	4	(a)(d)	(a)	(a)		4	4
H-3.	Garages	4	4(c)	4(c)	4	(c)	4	2(d)	3	4	4		4
I.	Hazardous use	(b)	(b)	(b)	(b)	(b)	(b)	4(d)	(b)	4	4	4
(a)   No special separation required. (b)   Mixed occupancy not permitted. (c)   Unpierced separations. (d)   A technology center shall have a minimum two-hour separation from all other occupancies including other business occupancies, regardless whether the subject building is protected by a sprinkler system. (e)   For trade or technical schools, shop portions of schools may be built to comply with requirements for industrial buildings, but shall have four-hour fire separations with double Class A fire doors between shop portions and academic portions of buildings.

 

(Added Coun. J. 6-28-00, p. 36679, § 5)