46.02
16397 Rev A Updated 03/2021 © 2021 Victaulic Company. All rights reserved.
5.0 PERFORMANCE (CONTINUED)
Obstructions
Piggyback Trusses
When trusses are stacked (“Piggyback”) at the peak, consideration to obstructions to the spray pattern of the RE
sprinklers must be made. These “Piggyback” configurations will typically include 2X “Stiffeners” running
perpendicular to the trusses. Additionally, these “stiffeners” will be sandwiched between the uppermost and
lowermost horizontal chords of the two stacked trusses. In the event that all members are above the level of the
FL-SA/RE deflector, no obstruction exists to the FL-SA/RE spray pattern. See Figure 29 and Figure 30.
FL-SA/RE SPRINKLER
FIGURE 29: DEFLECTOR COMPLETELY BELOW
STIFFENERS AND HORIZONTAL WEB MEMBERS
(NO OBSTRUCTION)
In the event that the FL-SA/RE Deflector is located completely above the stiffeners and horizontal web members, the
parameters of Figure 28 must be met for the spray pattern to be considered unobstructed.
FL-SA/RE SPRINKLER
FIGURE 30: DEFLECTOR ABOVE STIFFENERS AND
HORIZONTAL WEB MEMBERS
(NO OBSTRUCTION)
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