First verify that the sprinkler at the peak is considered to be
“Acceptable” or “Obstructed” by the sloped ceiling in accordance
with Figure 12 Graph. Measure horizontally from the deflector to
the sloped ceiling, this is equal to the “D” dimension in the Figure
12 Graph. If the “D” dimension is “Acceptable”, then Figure 7
applies. If “D” is “Obstructed”, then the protection area of the
sprinkler at the peak will be the horizontal distance to the obstruct-
ing ceiling. The minimum distance between sprinklers is mea-
sured horizontally. Staggering sprinklers will help maintain
minimum horizontal distances in difficult situations. Dimensions
“A” and “B” are measured along the slope. For angles greater
than 60
°
, verify with Central's Technical Services Department.
A — NFPA minimum 4", maximum 1/2 of the Listed spacing that
the sprinkler was calculated for.
B — See “E” for minimum spacing. Maximum Listed spacing that
the sprinkler was calculated for.
C — Maximum of 3'-0" vertically from the peak.
D — Horizontal distance from the deflector to the intersecting
sloped ceiling.
E — NFPA minimum of 8'-0" (when minimum of 8'-0" cannot be
obtained due to “B”, a baffle must be installed between
these sprinklers to obstruct the discharge and prevent cold-
solder). See “B” for maximum.
F — Acceptable for angles 0
°
to 60
°
.
Figure 7 - Spacing for Sprinkler at the Peak of a Sloped Ceiling
A
E
B
C
A
E
D
B
D
F
F
Figure 8 - Sprinkler Location on Opposing Slopes
First verify that the sprinkler nearest the peak is “Acceptable”
or “Obstructed” per Figure 14. If “Acceptable”, Figure 8
applies. If “Obstructed”, the horizontal distance to the
opposing slope is to be considered as the protected area. The
minimum distance between sprinklers is measured horizon-
tally, shown as dimension “E”. Staggering the sprinklers will
help maintain minimum horizontal distances in difficult
situations. Dimensions “A” and “B” are measured along the
slope. For angles greater than 60
°
, verify with Central's
Technical Services Department.
A — NFPA minimum of 4", maximum 1/2 of the Listed spacing
that the sprinkler was calculated for.
B — See “E” for minimum spacing. Maximum Listed spacing
that the sprinkler was calculated for.
C — Maximum of 3'-0" vertically from the peak.
D — Minimum 4". Also, see note above.
E — NFPA minimum of 8'-0" (when minimum of 8'-0" cannot
be obtained due to “B”, a baffle must be installed
between these sprinklers to obstruct the discharge and
prevent cold-solder). See “B” for maximum.
F — Acceptable for angles from 0
°
to 60
°
.
A
A
D
C
F
E
B
Figure 9 - Sprinkler Location on Coffered Ceiling
First verify that “D” is “Acceptable” or “Obstructed” per Figure
13. If “Acceptable”, Figure 9 applies. If “Obstructed”,
additional sprinklers will be necessary to protect the flat ceiling
area. The minimum distance between sprinklers is measured
horizontally. Staggering sprinklers will help maintain minimum
horizontal distances in difficult situations. Dimensions “A” and
“B” are measured along the slope. For angles greater than
60
°
, verify with Central's Technical Services Department.
A — NFPA minimum of 4", maximum 1/2 of the Listed
spacing that the sprinkler was calculated for.
B — See “E” for minimum spacing. Maximum Listed spacing
that the sprinkler was calculated for.
C — Maximum 3'-0" vertically from the peak.
D — Refer to Figure 13.
A
E
D
C
D
A
B
E — NFPA minimum of 8'-0" (when minimum of 8'-0" cannot
be obtained due to “B”, a baffle must be installed
between these sprinklers to obstruct the discharge and
prevent cold-solder). See “B” for maximum.
F — Acceptable for angles 0
°
to 60
°
.
OBSOLETE
