46.02
16397 Rev A Updated 03/2021 © 2021 Victaulic Company. All rights reserved.
5.0 PERFORMANCE (CONTINUED)
Downslope Design Criteria
Sprinkler Model
• FL-SA/DS
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
6
