1A. Prepare The I-Beam - Bigass 4900 Manuel D'installation

1a. Prepare the I-Beam

If you are mounting your fan to bar joists, proceed to step 1b on the following page.
Measure the flange width of the I-beam from which the fan will be hung. Select the upper mount mounting holes
that match the flange width of the I-beam.
Skip to step 3a.
Upper Mount
13-3/4'' x 10" (349 mm x 258 mm)
I-Beam Flange Width Mounting Holes
5" to 6-5/8" (127 mm to 168 mm) Inner holes
>6-5/8" to 8-1/4" (168 mm to 210 mm) Middle holes
>8-1/4" to 9-7/8"(210 mm to 250 mm) Outer holes
outer holes
middle holes
inner holes
Upper Mount
(top view)
10
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