BIG ASS FANS 4900 Installation Manual page 20

14
5b. Attach upper yoke (to angle irons)
Secure the upper yoke directly to the angle irons with the Upper Yoke Hardware as shown. The angle irons should be aligned with the
outermost holes of the upper yoke. Consult the diagrams below for distances between the angle irons.
Tighten the bolts to 40 ft·lb (54.2 N·m) using a
all the bolts securing the angle irons to the roof structure to 40 ft·lb (54.2 N·m).
Proceed to "Hanging the Fan" (p. 17).
Upper Yoke Hardware (BAF-Supplied):
a.
b.
c.
The angle irons should be aligned with the outermost holes on the upper yoke. Do not use beam clips on angle irons!
BIG ASS FAN 4900
Note: Dashed lines represent angle irons.
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Upper Yoke
a
b
b
c
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