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14
1a. Prepare I-Beam
ATTENTION
If you are mounting your fan to angle irons, proceed to the following page.
Measure the flange width of the I-beam from which the fan will be hung. Select the mounting holes that match the
flange width of the I-beam from the diagrams below.
Proceed to step 2.
Small Upper Mount
13-3/4’’ x 10” (349 mm x 258 mm)
I-Beam Flange Width
Mounting Holes
5” to 6-5/8”
(127 to 168 mm)
Inner holes
> 6-5/8” to 8-1/4”
(> 168 to 210 mm)
Middle holes
> 8-1/4” to 9-7/8”
(> 210 to 250 mm)
Outer holes
Large Upper Mount
18-1/2’’ x 10” (470 mm x 258 mm)
I-Beam Flange Width
Mounting Holes
9-7/8” to 11-3/8”
(250 to 289 mm)
Inner holes
> 11-3/8” to 13”
(> 289 to 330 mm)
Middle holes
> 13” to 14-5/8”
(> 330 to 371 mm)
Outer holes
outer holes
middle holes
inner holes
Upper Mount
(top view)
