SPRINKLER LOCATION REQUIREMENTS 13-73
9-3-9-2 Protection Against Freezing- Sprinklers in exhaust The spacing of the sprinklers over the open-grid ceiling
ducts subject to freezing shall be properly protected against shall then comply with the following:
freezing. (See 1 6. 4. 1.) (a) In light hazard occupancies where sprinkler spacing
9_3_9_3 Sprinkler Access- Access shall be provided to all sprin (either spray or old-style sprinklers) is less than 10 ft
klers for inspection, testing, and maintenance. 10 ft (3 m 3 m), a minimum clearance of at least
x x
9.3.9.4 Strainers. A listed line strainer shall be installed in the
18 in. (450 mm) shall be provided between the
main water supply preceding sprinklers having nominal K sprinkler deflectors and the upper surface of the
factors smaller than K-2.8 (40). open-grid ceiling. Where spacing is greater than
10 ft 10 ft (3 m 3 m) but less than 10 ft 12 ft
x x x
9.3. 10* Open-Grid Ceilings. Open-grid ceilings shall only be (3 m 3.7 m), a clearance of at least 24 in.
x
installed beneath sprinklers where one of the following is met: (600 mm) shall be provided from spray sprinklers
(1) Open-grid ceilings in which the openings are Y., in. and at least 36 in. (900 mm) from old-style sprin
(6 mm) or larger in the least dimension, where the thick klers. Where spacing is greater than 10 ft 12 ft x
ness or depth of the material does not exceed the least (3 m 3.7 m), a clearance of at least 48 in. (1.2 m)
x
dimension of the opening, and where such openings shall be provided.
constitute 70 percent of the area of the ceiling material. (b) In ordinary hazard occupancies, open-grid ceilings
shall be permitted to be installed beneath spray
sprinklers only. Where sprinkler spacing is less than
10 ft 10 ft (3 m 3 m), a minimum clearance of at
x x
:zs r-
least 24 in. (600 mm) shall be provided between the
sprinkler deflectors and the upper surface of the
r-
/ff-f--
Complete
open-grid ceiling. Where spacing is greater than
r- vertical 10 ft 10 ft (3 m 3 m), a clearance of at least
x x
- -J r-
divider 36 in. (900 m) shall be provided.
(2) Other types of open-grid ceilings shall be permitted to be
1 - -J
installed beneath sprinklers where they are listed for such
zs r- -l zs r- -l zs r- i
f-
QJ "oo"' service and are installed in accordance with instructions
� - -J r- -l r- -l r- -J - walkway - contained in each package of ceiling material.
c either solid
8QJ - -j r- -l r- -l r- -J or with 9.3. 1 1 Drop-Out Ceilings and Ceiling Materials.
U) -
-J r- -l r- -l r- -J
ventilation
_ open1ngs Drop-out ceilings and ceiling materials shall be
9.3. 1 1 . 1 *
permitted to be installed beneath sprinklers where the ceiling
i - -J zs r- -l zs r- -l zs r- -J ZS r- - panels or ceiling materials are listed for that service and are
� - -J r- -l r- -l r- -l r- -
installed in accordance with their listings.
�-
LL -J r- -l r- -l r- -l 1- - 9.3. 1 1 .2 Drop-out ceilings and ceiling materials meeting the
- -J r- -l r- -l 1- -l 1- -
criteria in 9.3.11.1 shall not be installed below quick-response
or extended coverage sprinklers unless specifically listed for
that application.
FIGURE 9.3.7(a) Sprinklers in Multitier Bookstacks with 9.3. 1 1 .3 Drop-out ceilings and ceiling materials meeting the
Complete Vertical Dividers. criteria in 9.3.11.1 shall not be considered ceilings within the
f-f- f-f-
context of this standard.
t --1
I I I
1- + -J � �����li lete
r- + -J :zs H - -J r- + -J zs r- - 9.3. 1 1 .4* Piping installed above drop-out ceilings and ceiling
!E - -J
-J + -J + -J
materials meeting the criteria in 9.3.11.1 shall not be consid
f- -(f 1- - divider
ered concealed piping.
+ -J f -J
_
f- f-f- Iff--
� -:
1--- 9.3. 1 1 .5* Sprinklers shall not be installed beneath drop-out
r- + -J r- + -J 1- + -J r- -
r, - r-H - f-H - H--1 - f-
ceilings or ceiling materials meeting the criteria in 9.3.11.1.
9.3. 1 2 * Old-style sprinklers shall be installed in fur storage
.� - l ZS +l + l ZS 1- + l Ventilation vaults.
:;:;c - -J f- t -J + -J f- + -J 1- - openings
§ -1 r- + -J r- + -J 1- + -J r- -
9.3.13 Stages.
1-i
-
r- + -J r- + -1 r- + -J r- - 9.3. 13.1 Sprinklers shall be installed under the roof at the ceil
f--H f-+-1 H--J f-----
ing, in spaces under the stage either containing combustible
t - -1 materials or constructed of combustible materials, and in all
- - - -
r- + -J zs r- + -J r- + -J zs r- - adjacent spaces and dressing rooms, storerooms, and work
� - -J r- + -J r- + -J 1- + -J r- - shops.
.LL
� - -J r- + -J r- + -J r- + -J r- -
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9.3. 13.2 Where proscenium opening protection is required, a
r- + -J r- + -J r- + -J r- - deluge system shall be provided with open sprinklers located
not more than 3 ft (900 mm) away from the stage side of the
FIGURE 9.3.7(b) Sprinklers in Multitier Bookstacks with
proscenium arch and spaced up to a maximum of 6 ft (1.8 m)
Incomplete Vertical Dividers.
on center. (See Chapter 1 9for design criteria.)
Shaded text = Revisions. .0. = Text deletions and figure/table revisions. • = Section deletions. N = New material. 2022 Edition
