20
OWSJ Bottom Mount Instructions
Used to mount fan between bottom of two OWSJs.
1. Place both sections of angle iron where it will be mounted. Make sure each section is overhanging the
joist.
2. Install the hat channel and angle top bracket to space the angle iron. Insert 1/2”-13 x 4” bolt and
washer through the bottom center hole of the hat channel. Secure with 1/2”-13 nylock nut and washer.
3. Place the top angle clamp onto the angle iron. The grooves in the clamp will align with the angle iron.
4. Install the bottom angle clamp using 1/2”-13 x 8” bolts and washers. Secure with 1/2”-13 nylock nuts
and washers.
5. Repeat securing the angle iron section to the other side.
6. Torque all hardware to 75 Ft-lbs/101 Nm.
Figure 17 - OWSJ Bottom Mount Details
OWSJ
3” x 3” x 1/4”
Long Angle Iron
1/2”-13 x 8” Bolt
and 1/2” Washer
1/2”-13 Nylock Nut
and 1/2” Washer
Top Angle Clamp
Angle Top Bracket
Hat
Channel
1/2”-13 x 4” Bolt
and 1/2” Washer
1/2”-13 Nylock Nut
and 1/2” Washer
Bottom Angle
Clamp
Hardware Torque
1/2” Hardware
75 Ft-lbs/101 Nm
2x Per
Assembly
NOTE: All hardware must
be minimum Grade 8.
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