Victaulic VicFlex AB12, Field Installation Handbook

Page: 126 / 204

I-VICFLEX_126
STYLE VS1 DRY SPRINKLER INSTALLATION
FOR FIRE PROTECTION SERVICE REV_A
STYLE VB3 AND VB4 BRACKETS - INSTALLATION
FOR WOOD JOISTS/STUDS
1.
Install the inlet of the Style VS1 Dry Sprinkler into the sprinkler piping, as described in
step 1 on page 124.
2. Loosen and remove the wing
screw of the Style VB3 or VB4
end bracket assembly. Remove
the end bracket assembly from
the square bar.
3. Measure the distance between the wood joists/studs.
3a. Cut the square bar to the length needed to fit between the two wood joists/studs.
This length shall be measured from the outside of the end bracket assembly to the point
on the square bar that will butt against the other wood joist/stud.
1 ½-inch⁄38-mm Long #10
Wood Screws (4 Total)
Wing
Screw
4. Place the end bracket assembly, removed in step 2, onto the end of the square bar so
that the square bar is flush with the outside of the end bracket assembly. Reinstall the
wing screw loosely into the top of the end bracket assembly.
5. Install the modified Style VB3 or VB4 Bracket between the wood joists/studs by using
four, 11/2-inch/38-mm long #10 wood screws in the locations noted in the graphic shown
above.
NOTE : Install the top two wood screws first.
6. 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).
7.
Complete the installation by following the applicable instructions in the “Sprinkler
Reducing Nipple Installation” section in this handbook.
NOTE : End brackets may be secured to the joists in a vertical or horizontal orientation,
provided they are secured with four screws.