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Revision date: 01.01.20
GROWSPAN
™
ROUND PREMIUM EXTRA TALL HIGH TUNNELS
TWIST-OF-THE-WRIST ASSEMBLY
Gather the Parts:
• Aluminum Channel
• Drive Handle
• Gearbox and Gearbox Drive
• Mounting Plate
• Bearing and Threaded Rod
• 3/8" Nuts and Washers
The Twist-of-the-Wrist Assembly is designed to roll up a
portion of the sides of the structure. The following steps
describe the assembly and its installation.
1. Drill a 5/16" hole through the trimmed cover conduit
1/2" from the end of the conduit.
2. Insert a tubing adapter into the conduit and align
the holes of the adapter with the drilled holes in the
conduit.
3. Select the aluminum channel and drill a 3/8" hole
through the channel approximately 2" from the end and
attach a threaded rod using a 3/8" nut on each side of
the channel.
2"
4. With lower end of the channel approximately 4" off the
ground, position the channel along the rafter at the end
of the building where the Twist-of-the-Wrist assembly
will be located.
5. Secure the upper end of the channel by drilling a 3/8"
hole through the end rafter and attach as shown. The
lower end of the channel will "float" and is not attached.
NOTE:
Install a flat washer between the nut and the
end panel.
6. Select the bearing bracket and attach the bearings as
needed. (In some instances, the bearings may come
already attached.) Assemble as follows:
Single bearings are attached to the sides of the bracket
and double bearings to the middle portion of the
bracket. Use 1/4" hex bolts and locknuts as needed.
Install a flat washer on both sides of each bearing to
insure proper operation of bearings and the assembly.
Install the longer bolts with bearings on the side of the
bracket that has the two holes. Install these
before
installing the double bearing assembles. See the
figures below.
7. For the spacers on the long bolts, insert a 5/16" nut
over each bolt.
These nuts are used as spacers only.
5/16" Nut
5/16" Nut
Flat Washer
Nut
