Installation Guide

BIG ASS FAN 4900

5b. Attach upper yoke (to angle irons)

Secure the upper yoke directly to the angle irons with the Upper Yoke Hardware as shown. The angle irons should be aligned with the

outermost holes of the upper yoke. Consult the diagrams below for distances between the angle irons.

Tighten the bolts to 40 ft·lb (54.2 N·m) using a torque wrench and 3/4” socket. After attaching the upper yoke to the angle irons, tighten

all the bolts securing the angle irons to the roof structure to 40 ft·lb (54.2 N·m).

Proceed to “Hanging the Fan” (p. 17).

Upper Yoke Hardware (BAF-Supplied):

a. (4) 1/2”-13 x 2” GR 8 Bolt

b. (8) 1/2’’ Flat Washer

c. (4) 1/2-13 Nylock Nut

Mounting Structure: Bar Joists (cont.)

The angle irons should be aligned with the outermost holes on the upper yoke. Do not use beam clips on angle irons!

Note: Dashed lines represent angle irons.

Side View

10-7/8” (27.6 cm)

Upper Yoke

13-3/4’’ (34.9 cm) x

9-5/8” (24.4 cm)