BIG ASS FANS 4900 Manuel D'installation page 13

PREPARING THE MOUNTING STRUCTURE: I-BEAM
I-Beam mounting guidelines
Big Ass Fans does not recommend mounting the fan to a fabricated I-beam.
Do not mount the fan directly to an I-beam without the upper mount, extension tube, and lower yoke.
The I-beam must be part of the existing building structure.
Select mounting holes
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.
I-Beam Flange Width
5" to 6-5/8" (127 to 168 mm)
> 6-5/8" to 8-1/4" (> 168 to 210 mm)
> 8-1/4" to 9-7/8" (> 210 to 251 mm)
Upper Mount
13-3/4'' x 9-1/2" (349 x 241 mm)
Outer holes
Middle holes
Inner holes
Upper Mount
13-3/4'' x 9-1/2" (349 x 241 mm)
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Mounting Holes
Inner holes
Middle holes
Outer holes
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