Victaulic FireLock Series User manual

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46.02 16397 Rev AUpdated 03/2021 © 2021 Victaulic Company. All rights reserved.
ALWAYS REFER TO ANY NOTIFICATIONS AT THE END OF THIS DOCUMENT REGARDING PRODUCT INSTALLATION, MAINTENANCE OR SUPPORT.
F L-S A / RE , V 5 6 20 F L-S A / D S , V 5 621
1.0 PRODUCT DESCRIPTION
SPECIFIC APPLICATION ATTIC SPRINKLERS
SIN V5620 V5621
ORIENTATION Upright Upright
K-FACTOR15.6 Imp./8.1 S.I. 5.6 Imp./8.1 S.I.
CONNECTION ½" NPT ½" NPT
MAX. WORKING PRESSURE 175 psi (1200 kPa) 175 psi (1200 kPa)
GLOBE RE-DESIGNATION GL5620 GL5621
AVAILABLE WRENCHES
SPRINKLER V56 Open End
Upright ■
Factory Hydrostatic Test: 100% @ 500 psi/3447 kPa/34 bar
Min. Operating Pressure: UL: 12.8 psi/88 kPa/0.9 bar
Temperature Rating: See tables in section 2.0
1 For K-Factor when pressure is measured in bar, multiply S.I. units by 10.0.
2.0 CERTIFICATION/LISTINGS
Sprinkler Model SIN
Nominal K Factor
Imperial
Listing Agency/
Approved
Temperature Ratings Area of Use
Roof Span
ft Roof Pitch
RE V5620 5.6 cULus 200°F/93°C RIDGE/SLOPE 72' MAX 3:12 to 6:12
DS V5621 5.6 cULus 200°F/93°C HIP/SINGLE SLOPE 72' MAX
NOTE
• Listings and approval as of printing.
• Listed to be utilized per NFPA 13 in conformance with the New Technology and Equivalency Sections.
Victaulic®FireLock™Series FL-SA/DS and FL-SA/RE
Specific Application Low Flow Attic Scheme, Quick Response
Upright, K5.6 (8.0) 46.02
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3.0 SPECIFICATIONS – MATERIAL
Deflector: Bronze
Bulb Nominal Diameter: 3.0 mm
Load Screw: Brass
Pip Cap: Brass
Spring Seal Assembly: PTFE coated Beryllium nickel alloy
Frame: Brass
Lodgement Spring: Stainless steel
Installation Wrench: Ductile iron
Sprinkler Frame Finishes: Plain brass
NOTE
• For cabinets and other accessories refer to separate sheet.
4.0 DIMENSIONS
V5621 V5620
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5.0 PERFORMANCE
Installation
The Specific Application Attic Sprinklers for Protecting Attics
must be installed in accordance with this section. The
FL-SA/RE and FL-SA/DS Specific Application Attic
Sprinklers comprise an overall protection scheme which
takes into account strategic positioning for activation
sensitivity while providing unique distribution characteristics
specifically designed for attic construction.
The protection methodology utilizing these sprinklers has
been full scale fire tested in the built attic environment.
As such, they must be installed in accordance with the
guidelines set forth within this data sheet. The NFPA 13
Density/Area prescriptive spacing requirements do not
apply as these sprinklers are not bound by the NFPA 13
"S x L Rules". The positioning and spacing requirements
of this data sheet take precedence over any other
prescriptive requirements that may exist in NFPA 13.
To install the Specific Application Attic Sprinklers, the
following steps shall be taken:
Step 1. Sprinklers must be oriented correctly as follows:
• Series FL-SA/RE Sprinklers
• At horizontal ridge (peak) – installed in the upright
vertical position with deflector parallel to the ceiling
below (i.e. sprinkler centerline perpendicular to
the ridgeline).
• Near eave or under hip type roofs – installed in
the upright position with deflector parallel to roof
deck (i.e. sprinkler centerline perpendicular to
the roof slope).
• Series FL-SA/DS Sprinklers
• These sprinklers are installed downslope from a
ridgeline/peak (See FIGURE 11). Installed in the
upright position with deflector parallel to roof
deck (i.e. sprinkler centerline perpendicular to
the roof slope).
Step 2. With pipe thread sealant applied to the pipe threads,
hand tighten the sprinkler into the sprinkler fitting.
NOTE
• Do not grasp the sprinkler by the deflector.
Step 3. Wrench-tighten the sprinkler using only the
appropriate wrench. Wrenches are only to be applied to
the sprinkler wrench flats or wrench hex, as applicable.
NOTE
• Do not apply wrench to frame arms.
Figure 6A
Figure 6B
FIGURE 6: DIMENSION FROM EAVE
FL-SA/DS
FIGURE 7: SPRINKLER FRAME ORIENTATION TO ROOF SLOPE
FIGURE 8: DIMENSION FROM TRUSS
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5.0 PERFORMANCE (CONTINUED)
System Design Procedure
Gable Style Roof
Option 1: Ridge Sprinklers Only
• When utilizing this option Series FL-SA/RE sprinklers
are used to protect the entirety of the attic space.
The span of the attic is measured along the floor
(or ceiling of floor below) of the attic space from
the peak to the intersection of the bottom of the
top chord of the roof joist and the non-combustible
insulation or floor joist on the floor (or ceiling of
floor below). The span is twice the longer of the two
measured spans. (See Figure 6)
• The maximum span which can be protected by a
single line of FL-SA/RE sprinklers at the peak is a
total span of 24 ft or a maximum half span of 12 ft.
Figure 9A
Option 2: Ridgeline Sprinklers/Eave
Sprinklers (FL-SA/RE)
• This approach utilizes the FL-SA/RE sprinklers at the
Ridgeline and downslope covering to the eave. (See
Figure 10 for dimensional limitations)
Figure 9B
Option 3: Ridgeline Sprinklers with Downslope
Sprinklers
• The maximum span of this approach is 72 ft or a
half span of 36 ft. as measured horizontally. (See
Figure 10 and Figure 11 for dimensional limitations)
= Model FL-SA/RE
= Model FL-SA/DS
Figure 9C
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5.0 PERFORMANCE (CONTINUED)
Ridgeline Design Criteria
Sprinkler Model
• F L- SA / RE
Flow Rate
• 20 gpm
Distance Between Sprinklers Along Ridge
• Minimum 6 ft
• Maximum 8 ft
Minimum Distance to Downslope Sprinkler
• 6 ft (measured horizontally)
Maximum Distance to Downslope Sprinkler
• 16 ft (measured horizontally)
Deflector Distance Below Ceiling (At Ridgeline)
• Minimum 16 in
• Maximum 24 in
Deflector Distance Below Ceiling (When Downslope of
Ridgeline)
• Install with deflector below bottom of top chord
1"minimum to 3" maximum.
Lateral Maximum Distance From Ridgeline
• 12 in
Distance From Hip Peak
• Minimum 1 ft
• Maximum 4 ft
Installation
• When installed for Ridgeline protection, the FL-SA/
RE Sprinkler has a zone of protection of 24 ft. wide
as measured horizontally across the ridgeline). The
maximum zone of protection on either side of the
ridgeline is 12 ft. (as measured horizontally). The
zone of protection along the ridgeline is 8 ft. (4 ft.
maximum to either side of the FL-SA/RE Sprinkler).
• When a FL-SA/RE sprinkler is installed under a
horizontal Ridge, the deflector is to be positioned
parallel with the floor/ceiling below. (Regardless of
allowed offset from directly below ridge)
• Maximum span for FL-SA/RE sprinkler to cover is 24
ft wide attic.
• Sprinklers must be installed with the frame arms
parallel to the ridge.
• Centerline of sprinkler must be a minimum of 6"
laterally from face of any truss. (see Figure 8)
• For obstruction criteria, see Obstruction section
within this data sheet.
• When installed under a flat sloped ceiling
(noncombustible insulation filled joist channels)
maximum deflector to ceiling distance is the same
as maximum distance below bottom of top chord or
deflector distance below ridge.
Hydraulic Calculations
• See Hydraulic Design Section
NOTE
• If a flat sloped ceiling is present
utilizing non combustible
insulation, the insulation must
completely fill the pockets between
the joists, and the insulation must
be secured in place with metal
wire netting or equivalent. The
metal wire netting is intended to
hold the insulation in place should
the insulation become wetted by
the operation of the sprinkler. Attic
sprinklers have not been evaluated
for use with spray foam insulation.
= Model FL-SA/RE
= Model FL-SA/DS
Figure 10: Ridgeline Layout Criteria
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5.0 PERFORMANCE (CONTINUED)
Downslope Design Criteria
Sprinkler Model
• F L- SA / D S
Flow Rate
• 20 gpm
Distance Between Sprinklers Perpendicular to Slope
• Minimum 4 ft
• Maximum 8 ft
Maximum Sprinkler Throw (measured horizontally)
• Upslope - 4 ft
• Downslope - 20 ft
Minimum Distance Between Sprinklers Downslope of the
FL-SA/DS (Throw Direction)
• 15 ft
Deflector Distance Below Ceiling
• Install with deflector below bottom of top chord
1" minimum to 4" maximum.
Distance Away From Hip Line
• Minimum 1 ft
• Maximum 3 ft
Installation
• The FL-SA/DS Sprinkler has a zone of protection of
20 ft. forward (measured on the horizontal); 4 ft.
backwards (measured on the horizontal; and 8 ft.
wide (4 ft. laterally to either side of the sprinkler).
• Ensure that the sprinkler deflector is installed with
the deflector parallel to the sloped roof above.
• Centerline of sprinkler must be a minimum of 6"
laterally from face of truss (See Figure 8).
• Must be offset at least one channel laterally from
any Ridgeline sprinkler.
• Sprinklers must be installed with the frame arms
perpendicular to the roof slope.
• For obstruction criteria, see Obstruction section
within this data sheet.
• When installed under a flat sloped ceiling
(noncombustible insulation filled joist channels)
maximum deflector to ceiling distance is the same
as maximum distance below bottom of top chord.
Hydraulic Calculations
• See Hydraulic Design Section
FL-SA/RE
FL-SA/DS
Figure 11: Downslope Layout Criteria
NOTE
• If a flat sloped ceiling is present utilizing non combustible insulation, the insulation must completely fill the pockets
between the joists, and the insulation must be secured in place with metal wire netting or equivalent. The metal wire
netting is intended to hold the insulation in place should the insulation become wetted by the operation of the
sprinkler. Attic sprinklers have not been evaluated for use with spray foam insulation.
Series FL-SA/DS
Series FL-SA/RE
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5.0 PERFORMANCE (CONTINUED)
Hip Area Sprinkler Design Criteria
Hip Truss/Jack Truss Construction
Sprinkler Model
• F L- SA / RE
FLOW RATE
• 20 gpm
Distance Between Sprinklers
First Row From Eave (measured horizontally)
• Minimum 6 ft
• Maximum 8 ft
Distance Between Sprinklers
All Other Rows Upslope (measured horizontally)
• Minimum 6 ft
• Maximum 12 ft
Distance From Eave To First Row (measured horizontally)
• Minimum 5 ft
• Maximum 12 ft
Distance Between Rows (measured horizontally)
• Minimum 6 ft
• Maximum 10 ft
Minimum Distance Between Sprinklers
• 6 ft
Deflector Distance Below Ceiling
• Install with deflector below bottom of top chord 1"
minimum to 3" maximum.
Sprinkler At Apex
• A FL-SA/RE Sprinkler must be installed between 1
ft. to 5 ft. down from the intersection of the ridgeline
and hip lines (Apex)
Sprinklers Adjacent To Hip Line
• All FL-SA/RE Sprinklers directly adjacent to hip line
shall be 1 ft. to 3 ft. from hip line (as measured
perpendicular to hip line)
Installation
• Ensure that the sprinkler is installed with the
deflector parallel to the sloped roof above.
• Sprinklers must be installed with the frame arms
perpendicular to the roof slope (see Figure 7).
• For obstruction criteria, see Obstruction section
within this data sheet.
• When installed under a flat sloped ceiling
(noncombustible insulation filled joist channels)
maximum deflector to ceiling distance is the same
as maximum distance below bottom of top chord.
Hydraulic Calculations
• See Hydraulic Design Section
FIGURE 12A: HIP LAYOUT CRITERIA
WHEN FIRST ROW OF SPRINKLERS PLACED "WITHIN" JACK TRUSSES
FIGURE 12B: HIP LAYOUT CRITERIA
WHEN FIRST ROW OF SPRINKLERS PLACED "BEYOND" JACK TRUSSES
FIGURE 12: HIP LAYOUT CRITERIA - HIP TRUSS/ JACK TRUSS CONSTRUCTION
NOTE
• If a flat sloped ceiling is present utilizing non combustible insulation, the insulation must completely fill the pockets
between the joists, and the insulation must be secured in place with metal wire netting or equivalent. The metal wire
netting is intended to hold the insulation in place should the insulation become wetted by the operation of the
sprinkler. Attic sprinklers have not been evaluated for use with spray foam insulation.
Series FL-SA/DS
Series FL-SA/RE
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5.0 PERFORMANCE (CONTINUED)
Hip Area Sprinkler Design Criteria
Framing Members Parallel to Roof Slope
Sprinkler Model
• F L- SA / RE
Flow Rate
• 20 gpm
Distance From Eave to First Row (Measured Horizontally)
• Minimum 5 ft
• Maximum 12 ft
Maximum Distance Between Sprinklers
• See Figure 13
Deflector Distance Below Ceiling
• Install with deflector below bottom of top chord 1"
minimum to 3" maximum.
Sprinkler at Apex
• A FL-SA/RE Sprinkler must be installed between 1
ft. to 5 ft. down from the intersection of the ridgeline
and hip lines (Apex)
Sprinklers Adjacent To Hip Line
• All FL-SA/RE Sprinklers directly adjacent to hip line
shall be 1 ft. to 3 ft. from hip line (as measured
perpendicular to hip line)
Installation
• Ensure that the sprinkler is installed with the
deflector parallel to the sloped roof above
• Sprinklers must be installed with the frame arms
perpendicular to the roof slope.
• For obstruction criteria, see Obstruction section
within this data sheet.
• When installed under a flat sloped ceiling
(noncombustible insulation filled joist channels)
maximum deflector to ceiling distance is the same
as maximum distance below bottom of top chord.
Hydraulic Calculations
• See Hydraulic Design Section
TYPICAL BELOW ENTIRE HIP ROOF WHEN FRAMING IS PARALLEL TO ROOF SLOPE
FIGURE 13: HIP LAYOUT CRITERIA
FRAMING MEMBERS PARALLEL TO ROOF SLOPE
NOTE
• If a flat sloped ceiling is present utilizing non combustible insulation, the insulation must completely fill the pockets
between the joists, and the insulation must be secured in place with metal wire netting or equivalent. The metal wire
netting is intended to hold the insulation in place should the insulation become wetted by the operation of the
sprinkler. Attic sprinklers have not been evaluated for use with spray foam insulation.
Series FL-SA/DS
Series FL-SA/RE
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5.0 PERFORMANCE (CONTINUED)
Hip Area Sprinkler Design Criteria
Framing Members Parallel to Roof Slope
Sprinkler Model
• FL-SA/DS (FL-SA/RE @ apex)
Flow Rate
• 20 gpm
Distance Between Sprinklers (Laterally)
• Minimum 4 ft.
• Maximum 8 ft.
Distance From Eave To First Row (Measured Horizontally)
• Minimum 5 ft.
• Maximum 20 ft.
Deflector Distance Below Ceiling
• Install with deflector below bottom of top chord 1"
minimum to 4" maximum.
Sprinkler At Apex
• A FL-SA/RE Sprinkler must be installed between 1
ft. to 5 ft. down from the intersection of the ridgeline
and hip lines (Apex)
Sprinklers Adjacent To Hip Line
• All FL-SA/RE Sprinklers directly adjacent to hip line
shall be 1 ft. to 3 ft. from hip line (as measured
perpendicular to hip line)
Installation
• Ensure that the sprinkler is installed with the
deflector parallel to the sloped roof above
• Sprinklers must be installed with the frame arms
perpendicular to the roof slope.
• For obstruction criteria, see Obstruction section
within this data sheet
• When installed under a flat sloped ceiling
(noncombustible insulation filled joist channels)
maximum deflector to ceiling distance is the same
as maximum distance below bottom of top chord.
Hydraulic Calculations
• See Hydraulic Design Section
TYPICAL BELOW ENTIRE HIP ROOF WHEN
FRAMING IS PARALLEL TO ROOF SLOPE
FIGURE 13A: HIP LAYOUT CRITERIA
FRAMING MEMBERS PARALLEL TO ROOF SLOPE
NOTE
• If a flat sloped ceiling is present utilizing non combustible insulation, the insulation must completely fill the pockets
between the joists, and the insulation must be secured in place with metal wire netting or equivalent. The metal wire
netting is intended to hold the insulation in place should the insulation become wetted by the operation of the
sprinkler. Attic sprinklers have not been evaluated for use with spray foam insulation.
Series FL-SA/DS
Series FL-SA/RE
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5.0 PERFORMANCE (CONTINUED)
Single Slope Design Criteria
Sprinkler Model
• F L- SA / D S
Flow Rate
• 20 gpm
Deflector Distance Below Peak (See Figure 14a)
• Minimum 16 in.
• Maximum 24 in.
Deflector Distance Below Sloping Roof Deck (See Figure
14a)
• Install with deflector below bottom of top chord to a
maximum of 2 in.
Distance Between Sprinklers Perpendicular to the Slope
• Minimum 4 ft.
• Maximum 8 ft.
Maximum Allowed Sprinkler Throw (Measured
Horizontally)
• Downslope - 16 ft.
Minimum Distance Between Sprinklers Downslope Of
The FL-SA/DS (Throw Direction)
• 15 ft. (as measured on the slope)
Installation
• Ensure that the sprinkler deflector is installed with
the deflector parallel to the sloped roof above.
• Centerline of sprinkler must be a minimum of 6"
laterally from face of truss. See Figure 8.
• When two rows of FL-SA/DS sprinklers are utilized,
the adjacent rows of sprinklers must be offset at
least one channel laterally from each other. See
Figure 14C.
• Sprinklers must be installed with the frame arms
perpendicular to the roof slope. See Figure 7.
• For obstruction criteria, see Obstruction section
within this data sheet.
• When installed under a flat sloped ceiling
(noncombustible insulation filled joist channels)
maximum deflector to ceiling distance is the same
as maximum distance below bottom of top chord.
Hydraulic Calculations
• See Hydraulic Design Section
NOTE
• If a flat sloped ceiling is present utilizing non combustible insulation, the
insulation must completely fill the pockets between the joists, and the
insulation must be secured in place with metal wire netting or equivalent.
The metal wire netting is intended to hold the insulation in place should
the insulation become wetted by the operation of the sprinkler. Attic
sprinklers have not been evaluated for use with spray foam insulation.
FIGURE 14A - SECTION VIEW DS SPRINKLER & DEFLECTOR PLACEMENT AT PEAK
FL-SA/DS
FIGURE 14B - 1 ROW DS SPRINKLER (HIP SHOWN AT CORNER) FIGURE 14C - 2 ROW DS SPRINKLER (HIP SHOWN AT CORNER)
FIGURE 14: SINGLE SLOPE LAYOUT CRITERIA
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5.0 PERFORMANCE (CONTINUED)
Dormer Protection Criteria
The protection scheme for dormer roofs shall be in accordance with the following guidelines:
Dormers Built Entirely Over (on top) of Main Roof Sheathing – 4 Sprinklers or Less – Any Slope
• RE/DS Sprinklers allowed (CPVC allowance applies for wet systems only)
• Standard Spray Sprinklers allowed
Dormers Built Entirely Over (on top) of Main Roof Sheathing - More than 4 Sprinklers
• RE/DS Sprinklers allowed where the pitch is between 3:12 and 6:12. Protection scheme utilized shall be in
accordance with this document
• Standard Spray Sprinklers allowed for any slope
Dormers Open to Attic Space Below – 4 Sprinklers or Less – Any Slope
• RE/DS Sprinklers allowed (CPVC allowance applies for wet systems only)
• Standard Spray Sprinklers allowed.
Dormers Open to Attic Space Below - More than 4 Sprinklers
• RE/DS Sprinklers allowed where the pitch is between 3:12 and 6:12. Protection scheme utilized shall be in
accordance with this document
• Standard Spray Sprinklers allowed for any slope. (Required to calculate Attic in accordance with NFPA 13 (i.e.
2535 sq. ft. for Dry Systems)
FIGURE 15A
DORMER OPEN TO ATTIC SPACE
FIGURE 14C
2 ROW DS SPRINKLER
(HIP SHOWN AT CORNER)
FIGURE 15: DORMERS SECTION VIEW
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
The Specific Application Attic protection scheme shall be hydraulically calculated in accordance with the following
guidelines. These calculation guidelines are applicable only to the special Attic Protection scheme utilizing FL-SA/RE
and FL-SA/DS sprinklers. These requirements are based on special full scale fire testing and in no way should be utilized
when designing other than these specially listed and tested sprinklers for use in sloped combustible attic structures.
As with Hydraulic Calculations performed in accordance with NFPA 13, multiple areas of piping may need to be
investigated and multiple calculations performed should it not be readily obvious of the hydraulically most demanding
area due to non-typical pipe layout. Hose allowances must be included in the hydraulic calculations in accordance
with NFPA 13.
GABLE ROOF CALCULATION PROCEDURE
3 BRANCHLINE DESIGN - WET SYSTEM
3 Branchline Design – Wet System
Perform the following 2 calculations:
Calculation #1: Calculate the 5 most hydraulically demanding sprinklers consisting of 5 FL-SA/RE (Ridgeline)
sprinklers. Minimum sprinkler flow is 20 gpm per sprinkler. See Figure 16A.
Calculation #2: Calculate the 5 most hydraulically demanding sprinklers consisting of 2 FL-SA/DS (Downslope)
sprinklers and 3 FL-SA/RE (Ridgeline) sprinklers. Minimum sprinkler flow is 20 gpm per sprinkler. See Figure 16B.
Note: If additional sprinklers are required beyond an obstruction, calculate up to 2 additional sprinklers beyond the
obstruction. See Figure 16B.
FIGURE 16A
DORMER OPEN TO ATTIC SPACE
FIGURE 16B
2 ROW DS SPRINKLER
(HIP SHOWN AT CORNER)
FIGURE 16: HYDRAULIC CALCULATION REQUIRED FOR WET 3 BRANCHLINE SYSTEM
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
3 Branchline Design - Dry System
Perform the following 2 calculations:
Calculation #1: Calculate the 6 most hydraulically demanding sprinklers consisting of 6 FL-SA/RE (Ridgeline) sprinklers.
Minimum sprinkler flow is 20 gpm per sprinkler. See Figure 17A.
Calculation #2: Calculate the 6 most hydraulically demanding sprinklers consisting of 2 FL-SA/DS (Downslope)
sprinklers and 4 FL-SA/RE (Ridgeline) sprinklers. Minimum sprinkler flow is 20 gpm per sprinkler. See Figure 17B.
Note: If additional sprinklers are required beyond an obstruction, calculate up to 2 additional sprinklers beyond the
obstruction. See Figure 17B.
FIGURE 17A FIGURE 17B
FIGURE 17: HYDRAULIC CALCULATIONS REQUIRED FOR DRY 3 BRANCHLINE SYSTEM
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
Hip Roof Calculation Procedure
When a Hip is included in the design of the attic, there
are three calculations required. One calculation for the
“Ridge/Hip Transition” area. The second and third
calculations determine the pipe sizing for the Hip area
itself. For the purposes of these hydraulic calculations
the Hip is broken into two areas; the “Lower Hip” area;
and the “Upper Hip” area. See above figure.
Hip Calculation (Hip Truss/Jack Truss Construction) -
Wet System
Calculation #1 – Ridge/Hip Transitions
• Calculate the most demanding 7 contiguous
sprinklers with a maximum of 5 sprinklers along the
ridge plus the 2 most demanding sprinklers within
the hip area. See Figure 18A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Calculation #2 – Lower Hip Area
• Calculate up to the 7 most demanding contiguous
sprinklers along the eave. This may include
sprinklers on both sides of the hip line as shown.
See Figure 18B.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Calculation #3 – Upper Hip Area
If there are 4 sprinklers or less in the shaded area
(Figure 18B):
• Calculate up to the 7 most demanding contiguous
sprinklers in the "Upper Hip" area. This may include
sprinklers on both sides of the hip line as shown.
• Minimum sprinkler flow is 20 gpm per sprinkler.
If there are more than 4 sprinklers in the shaded area
(Figure 18C):
• Calculate the hydraulically most demanding 75%
of the total number of sprinklers located within
the "Upper Hip" area, rounding up to the nearest
sprinkler. (Minimum number of sprinklers to be
calculated is 7)
• Minimum sprinkler flow is 20 gpm per sprinkler.
– Example shown in Figure 18C results in 9 sprinklers to
be calculated. (12 x 0.75 = 9)
FIGURE 18A
FIGURE 18B
FIGURE 18C
FIGURE 18: HYDRAULIC CALCULATIONS REQUIRED FOR HIP - WET SYSTEM
(HIP TRUSS/JACK TRUSS CONSTRUCTION)
•= RE
■= DS
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
Hip Calculation (Hip Truss/Jack Truss Construction - Dry System)
Calculation #1 – Ridge/Hip Transitions
• Calculate the most demanding 8 contiguous sprinklers with a maximum of 6 sprinklers along the ridge plus the 2
most demanding sprinklers within the hip area. See FIGURE 19A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Calculation #2 – Lower Hip Area
• Calculate the 8 most demanding contiguous sprinklers along the eave. This may include sprinklers on both sides
of the hip line as shown. See FIGURE 19B.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Calculation #3 – Upper Hip Area
If there are 4 sprinklers or less in the shaded area (FIGURE 19B):
• Calculate up to the 8 most demanding contiguous sprinklers in the "Upper Hip" area. This may include sprinklers
on both sides of the hip line as shown. See FIGURE 19B.
• Minimum sprinkler flow is 20 gpm per sprinkler.
If there are more than 4 sprinklers in the shaded area (FIGURE 19C):
• Calculate all sprinklers in the "Upper Hip" area.
• Minimum sprinkler flow is 20 gpm per sprinkler.
FIGURE 19B
FIGURE 19A FIGURE 19C
FIGURE 19: HYDRAULIC CALCULATIONS REQUIRED FOR HIP - DRY SYSTEM
(HIP TRUSS/JACK TRUSS CONSTRUCTION)
•= RE
■= DS
(Examples shown in these figures are for reference only. Actual sprinklers selected based on piping configuration
which results in the most demanding hydraulic demand.)
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
Hip Calculation RE Sprinklers (Framing Members Parallel
To Roof Slope) - Wet System
Calculation #1 – Ridge/Hip Transitions
• Calculate the most demanding 7 contiguous
sprinklers with a maximum of 5 sprinklers along the
ridge plus the 2 most demanding sprinklers within
the hip area. See Figure 18A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Calculation #2 – Hip Area
• Calculate all sprinklers within the hip area shown
shaded. See Figure 20.
• Minimum sprinkler flow is 20 gpm per sprinkler.
FIGURE 20: HYDRAULIC CALCULATIONS REQUIRED FOR RE @ HIP
(FRAMING MEMBERS PARALLEL TO SLOPE)
•= RE
■= DS
Hip Calculation RE Sprinklers (Framing Members Parallel
To Roof Slope) - Dry System
Calculation #1 – Ridge/Hip Transitions
• Calculate the most demanding 8 contiguous
sprinklers with a maximum of 6 sprinklers along the
ridge plus the 2 most demanding sprinklers within
the hip area. See Figure 19A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Calculation #2 – Hip Area
• Calculate all sprinklers within the hip area shown
shaded. See Figure 20.
• Minimum sprinkler flow is 20 gpm per sprinkler.
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
Hip Calculation DS Sprinklers (Framing Members Parallel
To Roof Slope) - Wet System
Calculation #1 – Ridge/Hip Transitions
• Calculate the most demanding 7 contiguous
sprinklers with a maximum of 5 sprinklers along the
ridge plus the 2 most demanding sprinklers within
the hip area. See Figure 18A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Calculation #2 – Hip Area
• Calculate all sprinklers within the hip area shown
shaded. See Figure 20A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
FIGURE 20A: HYDRAULIC CALCULATIONS REQUIRED FOR DS @ HIP
(FRAMING MEMBERS PARALLEL TO SLOPE)
•= RE
■= DS
Hip Calculation DS Sprinklers (Framing Members Parallel
To Roof Slope) - Dry System
Calculation #1 – Ridge/Hip Transitions
• Calculate the most demanding 8 contiguous
sprinklers with a maximum of 6 sprinklers along the
ridge plus the 2 most demanding sprinklers within
the hip area. See Figure 19A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Calculation #2 – Hip Area
• Calculate all sprinklers within the hip area shown
shaded. See Figure 20A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
Single Slope Roof Calculation Procedure
When a single slope roof area exists, the following calculation procedures shall be followed to size piping to the
sprinklers protecting this area. NOTE: Single Slopes (with vertical shear walls) result in different fire dynamics than
might be seen with gable and/or hip roof construction.
Single Slope Roof Calculation - Wet System
1: Row Protection
• Calculate the most hydraulically demanding 5 contiguous DS sprinklers. See Figure 21A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
2: Row Protection
The following 2 sets of calculations shall be performed:
• Calculation #1: Calculate the most hydraulically demanding 5 contiguous sprinklers consisting of 3 at the high
point and 2 on the adjacent slope. See Figure 21B.
• Calculation #2: Calculate the most hydraulically demanding 5 contiguous sprinklers along the high point. See
Figure 21C.
• Minimum sprinkler flow is 20 gpm per sprinkler.
FIGURE 21A
1 ROW PROTECTION CALCULATION
FIGURE 21B
2 ROW PROTECTION CALCULATION #1
FIGURE 21C
2 ROW PROTECTION CALCULATION #2
FIGURE 21: HYDRAULIC CALCULATIONS REQUIRED FOR WET SYSTEM
SINGLE SLOPE DESIGN
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
Single Slope Roof Calculation Procedure
Single Slope Roof Calculation - Dry System
1: Row Protection
• Calculate the most hydraulically demanding 7 contiguous DS sprinklers. See Figure 22A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
2: Row Protection
The following 2 sets of calculations shall be performed:
• Calculation #1: Calculate the 7 most hydraulically demanding contiguous DS sprinklers located along the high
point (peak). See Figure 22B.
• Calculation #2: Calculate the 7 most hydraulically contiguous DS sprinklers consisting of 5 DS at the hight point
(peak) and 2 DS sprinklers on the adjacent downslope branchline. See Figure 22C.
• Minimum sprinkler flow is 20 gpm per sprinkler.
FIGURE 22A
1 ROW PROTECTION CALCULATION #1
FIGURE 22B
1 ROW PROTECTION CALCULATION
FIGURE 22C
1ROW PROTECTION CALCULATION #2
FIGURE 21: HYDRAULIC CALCULATIONS REQUIRED FOR DRY SYSTEM
SINGLE SLOPE DESIGN
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5.0 PERFORMANCE (CONTINUED)
Hydraulic Design
Single Slope Roof With Hip Calculation Procedure
Single Slope Roof Calculation - Wet System
1: Row Protection
• Calculate the 5 most hydraulically demanding contiguous DS sprinklers located along the high point plus the 2
most demanding sprinklers along the hip line. See Figure 23A.
• Minimum sprinkler flow is 20 gpm per sprinkler.
2: Row Protection
The following 3 sets of calculations shall be performed:
• Calculation #1: Calculate the 3 most hydraulically demanding contiguous DS sprinklers located along the high
point (peak) plus the 2 most demanding sprinklers along the hip line. See Figure 23B.
• Calculation #2: Calculate the most hydraulically demanding 5 contiguous sprinklers along the high point. See
Figure 23C.
• Calculation #3: Calculate all sprinklers within the shaded corner Hip area as shown. See Figure 23D.
• Minimum sprinkler flow is 20 gpm per sprinkler.
Note: The "plus 2" most demanding sprinklers along the hip line may vary from that shown in the figures depending
on actual piping. Designer may need to investigate multiple options to determine the 2 most demanding sprinklers to
incorporate into the calculations.
FIGURE 23A: 1 ROW PROTECTION CALCULATION FIGURE 23B: 2 ROW PROTECTION CALCULATION #1
FIGURE 23C: 2 ROW PROTECTION CALCULATION #2 FIGURE 23D: 2 ROW PROTECTION CALCULATION #3
FIGURE 23: SINGLE SLOPE DESIGN
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