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WWW.BIGASSFANS.COM ©2010 DELTA T CORP. DBA BIG ASS FAN ALL RIGHTS RESERVED
8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Mounting Method 1: I-Beam
Big Ass Fans can only be hung from an I-beam or angle irons. See the following page for angle iron
mounting instructions. Consult a structural engineer for installation methods not covered in this manual.
WARNING: WARNING: The fan should not be installed unless the structure on which the fan is to be mounted is of sound
construction, undamaged, and capable of supporting the loads of the fan and the method of attachment to the structure. A
structural engineer should verify that the structure is adequate prior to fan installation. Verifying the stability of the mounting
structure is the sole responsibility of the customer and/or end user, and Big Ass Fans hereby expressly disclaims any
liability arising therefrom, or arising from the use of any materials or hardware other than those supplied by Big Ass Fans or
otherwise specified in these installation instructions.
ATTENTION: The I-beam on which the fan will mount must be part of the existing building structure.
1. Attach Upper Yoke (to I-Beam)
Measure the flange width of the I-beam from which the fan will be hung. Consult the tables and diagram below to determine what size
upper yoke is included with your fan package. Select the upper yoke mounting holes that match the flange width of the I-beam.
CAUTION: Install the spacers
only if the thickness of the I-beam flange exceeds 3/8” (1 cm). The mounting holes on the
spacer are closer to one side than the other. Make sure this side is facing the I-beam.
Secure the upper yoke to the I-beam with the Beam Clip Hardware as shown. Tighten the bolts to 40 ft·lb
f
(54.2 N·m) using a 3/4”
socket with torque wrench.
Proceed to “Hanging the Fan” (p. 18).
Beam Clip Hardware (BAF-Supplied):
a. (4) 1/2-13 x 2” GR 8 Bolt
b. (8) 1/2’’ Flat Washer
c. (4) 1/2-13 Nylock Nut
d. (2) Beam Clamp
e. (2) Spacer
Small Upper Yoke
13 1/4’’ (33.7 cm) x 9 5/8” (24.4 cm)
I-Beam
Flange Width
Upper Yoke
Mounting Holes
5” (12.7 cm) -
6 5/8” (16.8cm)
inner holes
>6 5/8” (16.8 cm) -
8 1/4” (21 cm)
middle holes
>8 1/4”(21 cm) -
9 7/8”(25 cm)
outer holes
Large Upper Yoke
18’’ (45.7 cm) x 9 5/8” (24.4 cm)
I-Beam
Flange Width
Upper Yoke
Mounting Holes
9 7/8” (25 cm) -
11 3/8” (28.9 cm)
inner holes
>11 3/8” (28.9 cm) -
13” (33 cm)
middle holes
>13” (33 cm) -
14 5/8” (37.1 cm)
outer holes
Upper Yoke
(top view)
outer hole
middle hole
inner hole
outer hole
middle hole
inner hole
Upper Yoke
(top view)
outer holes
inner holes
middle holes
Side View
b
a
c
b
e
d
