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4. Determine roof structure mounting points
The angle irons should be aligned with the outermost holes of the upper mount.
Determine the mounting points in the roof structure for the angle irons. Consult the appropriate diagram below
for distances between the angle irons. Dashed lines represent angle irons.
10-7/8" (276 mm)
15-5/8" (397 mm)
Ø9/16''
Ø9/16''
(14 mm)
(14 mm)
5-1/2"
5-1/2"
(140 mm)
(140 mm)
Small Upper Mount (Standard)
Large Upper Mount (Optional)
13-3/4'' x 9-1/2" (349 x 241 mm)
18-1/2'' x 9-1/2" (470 x 241 mm)
Direct Mount
5-1/2"
(140 mm)
Ø9/16'' (14 mm)
5-1/2"
(140 mm)
Top of Main Fan Unit
7
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