Select Proper Angle Irons - BIG ASS FANS 4900 Installation Manual

PREPARING THE MOUNTING STRUCTURE: BAR JOISTS
Bar joist mounting guidelines
The fan must be hung from angle irons mounted to bar joists.
The installer must supply the angle irons and angle iron hardware.
Do not install the fan from a single purlin, truss, or bar joist.
Angle iron spans should not exceed 12 ft (3.7 m).
The angle irons must be fastened to the roof structure at each end.

1. Select proper angle irons

Angle Iron Span
(between mounting points)
6 ft (1.8 m) or less
> 6 to 8 ft
(> 1.8 to 2.4 m)
> 8 to 12 ft
(> 2.4 to 3.7 m)
1. Two pairs of angle irons needed
Minimum Angle Iron Dimensions
(W x H x T)
2.5" x 2.5" x 0.25"
(64 x 64 x 6 mm)
3" x 3" x 0.25"
(76 x 76 x 6 mm)
3" x 3" x 0.25"
(76 x 76 x 6 mm)
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Angle Iron Side View
(see table for dimensions)
Height
ALL RIGHTS RESERVED.
Number of Angle
Irons Needed
2
2
4
1
Thickness
Width
5