GROWSPAN
™
GOTHIC PREMIUM HIGH TUNNELS
6
108185_86_87_88_89H Revision date: 01.08.21
RIBBON BOARD — OPTIONAL
A customer-supplied ribbon board is optional for the
installation of the roll-up panel. Fasteners are included.
Customer supplies the materials for the ribbon board.
ATTENTION:
The ribbon board and the double u-channel
run the length of the frame along each side. Height
is typically set a few inches below the rafter curve to
maximize the opening for ventilation.
Maximum sidewall
opening for this frame design is 6' 6". See grid diagram
in the Quick Start section near the back of this guide.
DEPENDING ON PURLIN LOCATION, THE DOUBLE
U-CHANNEL CAN BE INSTALLED EITHER ABOVE (NOT
SHOWN) OR BELOW THE PURLIN (AS SHOWN.)
DO
NOT INSTALL THE RIBBON BOARD ON THE RAFTER
CURVE.
ROLL-UP SIDES: Ribbon Boards & Baseboards (See Below)
NOTE:
If your high tunnel is equipped with drop-down side panels, skip this page and continue on the next page.
A ribbon board is optional for high tunnels with roll-up sides. The double u-channel provides sufficient support when
attached directly to the rafters. A baseboard is strongly recommended, but not required. When installed, a baseboard
helps prevent ground posts from working loose in sandy soil when concrete is not used.
Minimum board requirements
are shown in the diagrams below.
If a ribbon board is not
used, attach the 104211
double u-channel
directly to the rafters
along the outside of the
frame using Tek screws
as shown.
Diagram shows
the 104211 double
u-channel attached
directly to the rafter
without a ribbon board.
BASEBOARD — STRONGLY RECOMMENDED
A baseboard is not required for buildings with roll-up
sides panel, but installing one is strongly recommended.
Fasteners are included to attach the boards to the frame.
Customer supplies baseboard material.
Minimum lumber
dimensions are also shown.
Ground Level
Inside of Frame
Outside of
Frame
2" x 6" Board
Fasteners (1/4" x 4" carriage bolts (FAH009B) and FA4652
wood screws) are included. Depending on board width,
use two (2) carriage bolts per rafter connection for the
baseboard.
Secure baseboard and ribbon board joints between rafters
on the inside of the frame as shown to prevent conflicts
with other components.
DIAGRAMS ARE NOT TO SCALE.
Wood Screw
End View
Rafter Leg
Purlin clamp
and purlin pipe.
1/4" x 4" Carriage
Bolts (FAH009B),
1/4" flat washers, and
FALB01B 1/4" nuts.
2" x 6" Board
Outside the Frame
U-channel
(104211)
Wood Screw
Rafter Leg
Outside the Frame
Rafter Leg
STEEL GIRT BASEBOARDS —
ADDITIONAL PURCHASE REQUIRED
If you purchased the steel girt baseboards for the high
tunnel, see the baseboard information on
Page 15
.
