Astm C645 Metal Joists/Studs In Accordance With Astm C754 Standards Installation (Fm Only For Ab1 And Fm/Ul For Ab2) - Victaulic VicFlex I-VICFLEX Field Installation Handbook

ASTM C645 METAL JOISTS/STUDS IN
ACCORDANCE WITH ASTM C754 STANDARDS
INSTALLATION (FM ONLY FOR AB1 AND
FM/UL FOR AB2)
1. Install the flexible hose into the sprinkler piping and the sprinkler reducing nipple onto
the flexible hose by following the applicable instructions in the "Connection to Sprinkler
Piping" and "Connecting the Sprinkler Reducing Nipple to the Flexible Hose" sections.
1¼-inch/32-mm Long #10 Self-Drilling
3. Rotate the end bracket assembly (side with the wing screw removed in step 2) 180°,
as shown in the graphic above. Reinstall the wing screw loosely into the top of the end
bracket assembly.
3a. Place the end bracket assembly (without the wing screw) against the outside surface
of the metal joist/stud with the square bar resting on top of the metal joists/studs.
3b. Slide the end bracket assembly (with the wing screw) toward the outside, flat surface
of the opposite metal joist/stud, as shown in the graphic above.
4. Install the modified Style AB1 or AB2 Bracket to the metal joists/studs by using four,
1 1/4-inch/32-mm long #10 self-drilling sheet metal screws in the locations noted in the
graphic shown above. NOTE: Install the top two sheet metal screws first.
5. Optional: Tighten the wing screw on top of the end bracket assembly to a torque of
36 inch-lbs/4 N•m (approximately 1/2 to 3/4 of a turn past hand-tight).
6. Complete the installation by following the applicable instructions in the "Sprinkler
Reducing Nipple Installation" and "Sprinkler Installation" sections.
NOTES:
• For metal joists/studs larger than 2 x 4, longer sprinkler reducing nipples shall be
used, or one of the alternative installation methods on the following pages shall be
followed.
• For the 24-inch/610-mm length Style AB2 Bracket, the maximum on-center
spacing between metal joists/studs is 20-inches/508-mm.
STYLE AB1, AB2, AND AB10 BRACKETS
INSTALLATION INSTRUCTIONS REV_A
Sheet Metal Screws (4 Total)
2. Loosen and remove the wing screw
of the Style AB1 or AB2 end bracket
assembly.
NOTE: End Bracket with
Wing Screw is Turned 180°
Wing Screw
I-VICFLEX_29