BIG ASS FANS Isis, Installation Manual

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Isis
®
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5. Attach upper mount (to angle irons)
CAUTION: After attaching the upper mount to the angle irons, tighten all the bolts securing the angle irons to the roof
structure to 25 ft·lb (33.9 N·m) using a torque wrench and a 9/16” socket.
Secure the upper mount directly to the angle irons with the Mounting Hardware as shown. Consult the diagrams below for distances
between the angle irons. Torque the bolts to
25 ft·lb (33.9 N·m)
using a torque wrench with a 9/16” socket.
Note: If desired, the upper mount and extension tube can be pre-assembled. DO NOT tighten the bolts until the fan is installed and
hanging freely to allow for balancing.
Mounting Hardware (BAF-Supplied):
a. (4) 3/8-16 x 1-1/2” GR 8 Bolt
b. (8) 3/8’’ Flat Washer
c. (4) 3/8”-16 Nylock Nut
Mounting Method: Angle Irons (cont.)
c
b
b
a
Note: Dashed lines represent angle irons.
5 1/2” (14.6cm)
5 1/2” (14.6cm)
Side View