GrowSpan 111771 User manual

1
GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
Photo may show a different but similar model.
STK# DIMENSIONS
111770 30' W x 12' H x 24' L
111771 30' W x 12' H x 36' L
111772 30' W x 12' H x 48' L
111773 30' W x 12' H x 60' L
111774 30' W x 12' H x 72' L
111775 30' W x 12' H x 84' L
111776 30' W x 12' H x 96' L
GrowSpan™Rolling Premium High Tunnels
©2016 GrowSpan
All Rights Reserved. Reproduction
is prohibited without permission.

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
2Revision date: 01.01.16
LOCATION
Choosing the proper location is an important step before
you begin to assemble the structure.
The following suggestions and precautions will help you
determine whether your selected location is the best
location.
• Never erect the structure under power lines.
• Identify whether underground cables and pipes are
present before preparing the site or anchoring the
structure.
• Location should be away from structures that could
cause snow to drift on or around the building.
• Do not position the high tunnel where large loads
such as snow and ice, large tree branches, or other
overhead obstacles could fall.
SITE
After choosing a location, proper preparation of the site is
essential. Follow the information below.
• A level site is required. The site must be level to
properly and safely erect, anchor, and roll the structure.
• Drainage: Water draining off the structure and from
areas surrounding the site should drain away from the
site to prevent damage to the site, the structure, and
contents of the structure.
WARNING: The individuals assembling this structure
are responsible for designing and furnishing all
temporary bracing, shoring and support needed during
the assembly process. For safety reasons, those who
are not familiar with recognized construction methods
and techniques must seek the help of a qualified
contractor.
YOU MUST READ THIS DOCUMENT BEFORE YOU
BEGIN TO ASSEMBLE THE SHELTER.
Thank you for purchasing this GrowSpan™ high tunnel.
When properly assembled and maintained, this product will
provide years of reliable service. These instructions include
helpful hints and important information needed to safely
assemble and properly maintain the high tunnel. Please
read these instructions before you begin.
If you have any questions during the assembly, contact
Customer Service for assistance.
SAFETY PRECAUTIONS
• Wear eye and head protection; wear gloves when
handling metal tubes.
• Use a portable GFCI (Ground Fault Circuit Interrupter)
when working with power tools and cords.
• Do not climb on the high tunnel or framing during or
after construction.
• Do not occupy the high tunnel during high winds,
tornadoes, or hurricanes.
• NEVER move high tunnel during windy conditions.
• Do not store hazardous materials in the high tunnel.
• Provide proper ingress and egress to prevent
entrapment.
ANCHORING INSTRUCTIONS
Prior to assembling this high tunnel, please read the MUST
READ document included with the shipment.
WARNING: The anchor assembly is an integral part of
the high tunnel construction. Improper anchoring may
cause high tunnel instability and failure of the structure.
Failing to anchor the high tunnel properly will void the
manufacturer’s warranty and may cause serious injury
and damage.
Follow the instructions on page 24 of this guide
to properly anchor your rolling high tunnel. Refer
to page 50 or 51 for diagrams showing where to
attach the anchor straps for your building.
MOVING THE HIGH TUNNEL
Additional 1.66" pipe track is included to assist you with
moving the high tunnel from one section of your field to
another.
Side Wall Anchors: Your premium rolling high tunnel also
includes extra stake and strap anchors to allow for the
installation of another complete set of anchors to secure
the sides of the building once it is moved.
End Wall Anchors: The anchors for the end walls do not
require the use of the strap. In addition, you must remove
and reuse the stakes to secure the end wall frames once
the frame is rolled to a new location. See the connection
details in the Quick Start section for additional information.
Consult the anchoring information on page 50 and 51.

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GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
ASSEMBLY PROCEDURE
Following the instructions as presented will help ensure the
proper assembly of your high tunnel. Failing to follow these
steps may result in an improperly assembled and anchored
high tunnel and will void all warranty and protection the
owner is entitled.
The steps outlining the assembly process are as follows:
1. Verify that all parts are included in the shipment. Notify
Customer Service for questions or concerns.
2. Read these instructions, the Must Read document, and
all additional documentation included with the shipment
before you begin assembling the high tunnel.
3. Gather the tools, bracing, ladders (and lifts), and
assistance needed to assemble the high tunnel.
4. Check the weather before you install the roof cover
and any panels (if equipped). Do not install covers or
panels on a windy or stormy day.
5. Re-evaluate the location and site based on the
information and precautions presented in the
documentation included with the shipment.
6. Prepare the site (if applicable).
7. Assemble the frame components in the order they are
presented in these instructions.
8. Assemble the frame including the struts (if equipped).
9. Properly anchor the assembled frame.
10. Install, tighten, and secure the end panels and cover
film.
11. Read the care and maintenance information at the end
of these instructions.
12. Complete and return all warranty information as
instructed.
LIST OF WORDS AND PHRASES
Before you begin, it is important to become familiar with the
words and phrases used in this instruction manual.
These words and phrases are common to most
GrowSpan™ shelters and identify the different parts of
the shelter. (Some are used in this document. Others may
not apply to this particular shelter.) These terms describe
the shipped parts and can also be found on the materials
list/spec sheets included with the shipment. To aid in the
assembly, read through the following definitions before you
begin to assemble your shelter.
• Conduit: An assembly of pipes used to secure the
cover film and end panels (if equipped). Purlins and
some strut assemblies also consist of connected pipes
to form a conduit. Each pipe joint of a conduit assembly
is secured with a self-tapping Tek screw.
• Must Read Document: This document includes
building and shelter anchoring instructions, steps for
end wall reinforcement, safety precautions, and notices
and warnings. The Must Read document is sent with
all shelters and buildings. If you did not receive a Must
Read document, contact Customer Service to request
one.
• On-Center: Term used to describe a measurement
taken from the vertical center of the rafter or frame
member to the vertical center of another.
• Purlin: The pipe assembly that runs perpendicular to
the rafters or main framework
Purlins are found on the sides and roof areas of the
assembled frame, are evenly spaced, and typically run
from the front to the back of the shelter.
• Plain or Straight Pipe: A term used to describe a pipe
that has the same diameter or width throughout its
entire length.
• Strut: A strut is usually a length of pipe with two
flattened ends and is used for diagonal bracing of the
shelter frame. A strut is typically secured to the frame
by special brackets and bolts.
• Swaged End or Swaged Pipe: The term “swaged''
refers to the tapered end of the pipe or tube. Swaged
ends of a pipe can be inserted into couplers and the
straight ends of other pipes.
• Tek Screw: A self-tapping fastener used to secure pipe
joints and to fasten brackets to rafters.

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
4Revision date: 01.01.16
REQUIRED TOOLS
The following list identifies the main tools needed to
assemble the shelter. Additional tools and supports may be
needed depending on the structure, location, and
application.
• Tape measure or measuring device
• Fine point marker to mark the location on tubing.
• Variable speed drill and impact driver (cordless with
extra batteries works best)
• Wrench, ratchet, and socket set (recommended)
• Hex wrench set to secure end frame fittings
• Scissors, box cutter, or utility knife
• Ropes long enough to reach over the frame. May not
be needed depending on number of assistants and lifts.
• Hammers and gloves
• Duct tape (supplied)
• Ladders, work platforms, and other machinery for lifting
designed to work safely at the height of the frame
UNPACK AND IDENTIFY PARTS
The following steps will ensure that you have all the
necessary parts before you begin to assemble the shelter
frame.
1. Unpack the contents of the shipment and place where
you can easily inventory the parts. Refer to the Bill of
Materials/Spec Sheets.
2. Verify that all parts listed on the Bill of Materials/Spec
Sheets are present. If anything is missing or you have
questions, consult the Pictorial Parts Guide and all
diagrams for clarification, or contact Customer Service.
NOTE: At this time, you do not need to open the plastic
bags containing smaller parts such as fasteners or
washers (if equipped).
PARTS IDENTIFICATION
The following graphics and photos will help you identify
the different parts. (Some parts are not shown.)
FA4482B
Tek Screw
102857
End Clamp
102547
Cross Connector
103544
Mounting Plate
102569
Bearing
102717
Gearbox Drive
103496
Gearbox
102198
U-Channel Spring
102197
Poly Latch U-Channel
102570
Aluminum Channel
CC6212 &
CC6214
Fabric Clips
QH1400 &
QH1404
10015108
10016208
10015808

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GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
FRAME ASSEMBLY NOTE
During the assembly of the frame, install a Tek screw
through each clamp into the rafter and through each clamp
into the purlin. Secure all clamps in this manner.
Rafter Joint
Purlin
Tek Screw
Tek Screw
Rafter
Swaged
Plain
Swaged and Plain Rafter Sections
Zippered End Panel
Position all Tek screws so they will not touch the cover film
once it is installed.
111931 Castor with safety guard,
mounting bolt, lock washer, & nut
PARTS IDENTIFICATION (continued)
FAMF01B
1/4" x 1"
Fender
Washer
LJ7510
AS2166 100441
103937 Tent/Canopy Stake with Strap
AS2200
Quick Link

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
6Revision date: 01.01.16
102197 U-CHANNEL & RIBBON BOARD (OPTIONAL)
ANTI-BILLOW ROPE INSTALLATION
ANTI-BILLOW ROPE INSTALLATION
TO PREVENT DAMAGE AND POSSIBLE INJURY,
INSTALL THE ANTI-BILLOW ROPES IN SHORT
LENGTHS ALONG EACH SIDE OF THE FRAME.
DO NOT INSTALL AS A SINGLE LENGTH TIED AT
EACH END OF THE BUILDING. DOING SO WILL
RESULT IN A LOOSE SIDE PANEL IF THE SINGLE
ROPE BREAKS DURING STRONG WINDS.
ROPE
#1
NOTE: The circles identify the
ends of ROPE #1. Dashed line
identifies the anti-billow rope.
ROPE
#2
Ribbon Board
U-Channel
Secure U-channel to
ribbon board using
wood screws.
Ribbon Board
U-Channel
The 102197 U-channel is attached to the sides of the
frame and is used to secure the cover film to the frame.
For best results, attach a ribbon board to the frame and
then secure the U-channel to the ribbon board. All ribbon
board materials and fasteners used to secure the ribbon
board to the frame and the U-channel to the ribbon board
are supplied by the customer. They are not included with
this building. Use of the ribbon board (2" x 4" or 2" x 6") is
optional and left to the customer.
ATTENTION: If a ribbon board is used, do not use the
FA4482B Tek screws to secure the U-channel to the ribbon
board. You must use wood screws for this connection.
Install the wood screws every 16" throughout the length of
the frame. The customer supplies the fasteners.
The diagrams that follow show a ribbon board attached to
the frame.
SPLICE U-CHANNEL BETWEEN RAFTERS
If no ribbon board is used, secure the U-channel directly
to the rafters using FA4482B Tek screws. For best results,
cut the first section of U-channel for the side to 6' and
secure the splice between the two sections as shown
below. This prevents a seam at a single rafter where two
U-channel sections must be secured to the same rafter.
6" to 8"
6" to 8" splice section installed on
the back side of the U-channel to
the inside of the frame.
See the examples
on page 35 for
additional details.
See the examples
on page 35 for
additional details.

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GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
FRAME ASSEMBLY TIP: Build a Rafter-Spacing Jig
4' On-Center Rafter Spacing
To speed the assembly process and to maintain consistent rafter spacing, build a jig (guide) to use during
the frame assembly process. Using customer-supplied materials and fasteners, mark the required on-center
spacing for the frame. Next, take a section of the rafter and use that as a gauge to set the width of the jig at
each end. See the photo above. When built and used correctly, a jig saves time and eliminates the need to
measure the on-center rafter spacing at each purlin location during the assembly. The customer supplies all
materials to construct the jig.
4' On-Center
Rafter Pipe
Diameter
FRAME ASSEMBLY TIP: Build a Rafter-Spacing Jig

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
8Revision date: 01.01.16
GrowSpan™ Rolling Premium
High Tunnels
OVERVIEW
This section describes the basic assembly of your high
tunnel. See illustration below for basic high tunnel frame.
1. Locate the required parts for each assembly procedure.
2. Assemble the rafters and frame.
3. Anchor the rolling high tunnel frame.
4. Prepare and attach end panels.
5. Attach cover film and Twist-of-the-Wrist assembly.
ATTENTION: Position purlins evenly during the
frame assembly. See details in the Quick Start
Guide — over-the-top dimensions diagram.
Purlin
center
at top of
rafter.
1.66" Pipe for
Rolling High
Tunnel Track.
102197
U-Channel
Purlin

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GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
LAYOUT BUILDING POSITION ON SITE
To fully use the rolling feature of this building, you must
provide adequate distance for the building to move.
Minimum distance to clear the original location of the
building is twice the building length.
For example, if the building is 48' long, site must be at
least 96' long to allow the building to roll from one position
to another. Building is equipped with enough 1.66" pipe to
create a track that is twice the length of the building frame.
To move the building in the same direction, track can be
disassemble, reassembled, and attached to the desired
end of the track that the building rests on.
The information that follows shows using ground cloth
(included) to prevent vegetation from growing around
the track path. Basic steps to layout the track include the
following:
1. Determine the best position on the site for the
assembled building. Consider where the rafters will be
assembled and how these will be transported to the
frame assembly area.
2. A level site is required for best results. Remove
debris, obstacles, and other objects that can prevent
the 1.66" track pipe from running tight to the ground.
If necessary, prepare the track portion of the site by
leveling the bumps and hills and filling the ditches. The
straighter the track runs, the easier it will be to roll the
assembled building.
Allow 24" of clearance on each side of the track pipe to
more easily access the frame and frame anchors when
moving the building.
3. Roll out the ground cloth and stake the cloth to the site
using the fabric staples. Drive one (1) stake every 4'
along each outer edge of the ground cloth. See next
page for photos.
4. Locate the 1.66" pipe (166S099) used for the track.
Pipes are connected; however, joints are not secure
with any fasteners. Doing so will interfere with the metal
castors and prevent rolling. Joints can be secured with
a couple layers of duct tape if desired. Additionally,
pipes are not secured to the site.
5. Drive a couple of stakes to mark the width of the
building and the beginning of the track. Connect a few
pipes and place these in position on the site. Assemble
only enough to allow for the assembly of the first few
bays of the frame. Pipe can be added as the frame is
assembled. This prevents running over the track pipe
during assembly.
6. After setting a few track pipes in place, continue with
the assembly of the rafters and frame. Photo shows stakes at the width of the frame and at the
beginning of the track positions.
Track Location
Track Location
Width of Frame

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
10 Revision date: 01.01.16
LAYOUT BUILDING POSITION (CONTINUED)
Dashed line shows where to
drive the fabric staples–one
every 4' along each edge.

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GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
RAFTER ASSEMBLY — END RAFTERS: SEE NEXT PAGE FOR BASIC RAFTER ASSEMBLY DETAILS
Basic Assembly Tips
• Review all diagrams and drawings before you begin.
• Establish one area to assemble the rafters.
• Provide a clear path to transport assembled rafters to where the frame will be assembled.
Basic Assembly Notes for the Two (2) End Rafters—see details on next page:
1. Select the different rafter pipes and slide them together. Do not attach the 30R1904D (short) rafter pipes at this time.
2. Slide the band clamps (QH1404) and end clamps (102857) onto the rafter assembly. Prevent clamps from sliding off
the rafter during frame assembly by using a small piece of duct tape for each clamp if needed.
3. Secure each rafter pipe joint using a FA4482B Tek screw.
4. Assemble the horizontal cross beam pipes.
5. Slide two (2) band clamps (QH1404), one (1) end clamp (102857) and three (3) swivel-socket fittings onto the
assembled cross beam pipes. Refer to the diagrams below and those in the Quick Start section to position all clamps
and fittings as needed for assembly.
6. Secure each cross beam pipe joint using two (2) FA4482B Tek.
7. Verify that all clamps and fittings are in place and attach the cross beam and braces to the main rafter.
8. Repeat these steps to assemble the second end rafter.
9. Mark purlin locations on the rafter for reference during frame assembly. See the information on the following pages.
190P040
102857
102857
102857
102857
102857
102857
QH1304
190S099 190S099
10016208 10016208 10016208
30R1902
30R1902 30R1902
30R1902
30R1903
QH1404
QH1404
QH1404
QH1404
End Rafter
190P040
102857
190S099 190S099
1001620810016208 10016208
QH1404
QH1404QH1404
QH1404
End Rafter Cross Beam
ATTENTION: When setting the end
rafters, verify that all end clamps
(102857) are installed with the bolt
toward the inside of the frame.
Diagram shows clamp as seen from
outside the assembled frame.
Bolt
Install 2 screws for each
pipe splice for cross beam.

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
12 Revision date: 01.01.16
RAFTER ASSEMBLY — END RAFTERS (continued)
Gather the parts:
• Rafter Chord #30R1902 and #30R1903
• End Clamps (102857) and Tek Screws (FA4482B)
• Nut Setter 3/8'' x 2-9/16" Magnetic
Use the following photos and diagrams and the diagrams
in the Quick Start section of this document. It is best to
assemble all the rafters and then set them in place to
assemble the frame. If there are enough assistants, the
frame can be assembled as the rafters are completed.
Complete these steps to assemble the two (2) end rafters.
1. Select the five (5) pipes to assemble a rafter and
arrange these on a flat surface.
(#30R1902)
(#30R1903)
2. Slide the swaged portion of each rafter pipe into the
plain end of the pipe as shown.
3. Secure each joint with a single self-tapping Tek screw.
Position Tek screw approximately 2" from pipe joint.
2˝
FA4482B
4. Slide five (5) end clamps (102857) and four (4) band
clamps (QH1440) onto the assembled rafter. Consult
the Over-the-Top diagram in the Quick Start section for
clamp position. Mark the rafter and use a piece of duct
tape to hold clamps in place if needed
NOTE: Do not secure the clamps to the rafter at this
time. These will be repositioned during the frame
assembly. Only the two (2) end rafters include the
102857 end clamps.
View of the end rafter and clamps as shown from the
outside when the frame is assembled. Bolt will be to
the inside of the frame when installed correctly.
5. Assemble and install the rafter cross beam supports
and braces. Consult the Quick Start section and the
photos and diagrams on the previous page.
6. After assembling the two (2) end rafters, assemble the
remainder of the rafters. See the next page for rafter
assembly photos and page 14 for the interior rafter
profile.
190P040
102547
102547
102547
102547
102547
QH1304
190S099190S099
30R1902
30R1902 30R1902
30R1902
30R1903
QH1404
QH1404
QH1404
QH1404
Cross Beam Brace

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GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
RAFTER ASSEMBLY (continued)
Crew assembles a rafter by attaching the cross beam and braces (above). Consistent rafter width is maintained by
setting the ends of the assembled rafter between stakes. Consult the diagrams for on-center width dimensions. Below a
crew member secures the brace to the rafter and cross beam. (Photos show the assembly of an interior rafter.)

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
14 Revision date: 01.01.16
Basic Assembly Notes for All Interior Rafters:
The interior rafters are defined as all rafters that are between the two (2) end rafters. These rafters are typically the same
as the end rafters except they do not include the 102857 end clamps or any fittings for the end wall framing.
1. Select the different rafter pipes and slide them together. Do not attach the 30R1904D (short) rafter pipes at this time.
2. Slide the band clamps (QH1404) onto the rafter assembly. Prevent clamps from sliding off the rafter during frame
assembly by using a small piece of duct tape if needed.
3. Secure each rafter pipe joint using a FA4482B Tek screw.
4. Assemble the horizontal cross beam pipes.
5. Slide two (2) band clamps (QH1404) onto the assembled cross beam pipes. Refer to the diagram below and those in
the Quick Start section to position all clamps and fittings as needed for assembly.
6. Secure each cross beam pipe joint using two (2) FA4482B Tek.
7. Verify that all clamps are in place and attach the cross beam and braces to the main rafter.
8. Repeat these steps to assemble all remaining interior rafters.
9. Mark the purlin locations on each rafter for reference during the frame assembly. Consult previous page if needed.
RAFTER ASSEMBLY (continued)— INTERIOR RAFTERS
190P040
102547
102547
102547
102547
102547
102547
QH1304
190S099190S099
30R1902
30R1902 30R1902
30R1902
30R1903
QH1404
QH1404
QH1404
QH1404
190P040
190S099 190S099
QH1404
QH1404 QH1404
QH1404
Interior Rafter Cross Beam
Interior Rafter
Install 2 screws for each
pipe splice for cross beam.

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GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
RAFTER ASSEMBLY (continued) — Mark Purlin Locations on Rafters
After assembling each rafter, locate the middle of the rafter at the top and mark with a marker. Using the diagrams
on this page, mark the locations of all remaining purlins. Dimensions/locations are not critical; however, for a uniform
appearance and improved frame strength, it is best to position the purlins as close to the locations shown on these
diagrams. Minor adjustments may be required to keep purlins running parallel with the ground and each other. After
marking all rafters, continue as instructed.
6'-6 3/4"
6'-6 3/4"
4'-2"
6"
4'-2"
6"
End Rafter Mark the top, center location.
Purlin and End Clamp Position
End Clamp (102857)
and
Purlin Location
End Clamp (102857)
and
Purlin Location
End Clamp (102857)
and
Purlin Location
End Clamp (102857)
and
Purlin Location
4"4"
6'-6 3/4"
6'-6 3/4"
4'-2"
6"
4'-2"
6"
Interior Rafter Mark the top, center location.
Purlin and End Clamp Position
Cross Connector (102547)
and
Purlin Location
Cross Connector (102547)
and
Purlin Location
Cross Connector (102547)
and
Purlin Location
Cross Connector (102547)
and
Purlin Location
4"4"

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
16 Revision date: 01.01.16
ATTACH 111931 CASTORS TO 30R1904D RAFTER PIPES
Basic Assembly Notes to Attach Castors to Rafter Pipes:
One way to prevent misalignment of the castors and roller track is to attach the castors to the 30R1904D rafter pipes then
slide the rafter pipe into the ends of each assembled rafter during frame assembly. Preview the frame assembly steps for
additional information.
Gather the parts:
• Rafter Segments – #30R1904D
• Metal Castors — 111931
• Wrenches to tighten castor mounting bolt.
Complete these steps to attach the castors to the 30R1904D rafter sections:
1. Take one castor and remove the bolt, nut, washer, and angled safety guard.
2. Slide the mounting bolt of the castor through the mounting hole of the rafter segment as shown and add the metal
castor. Verify that you have positioned the castor on the correct side to the rafter segment. See next page diagrams.
3. Reinstall the safety guard, lock washer, and nut.

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GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
4. Tighten the 1/2" bolt and nut until snug. Do not overtighten. Doing so will crush the rafter pipe. Check that the metal
castor is not touching the rafter pipe. Castor should spin freely on axle bolt.
5. Repeat to attach all remaining castors to the remaining rafter segments.
6. Continue with the frame assembly.
ATTACH CASTORS TO RAFTER PIPES (continued)
STEP 4: Verify that the
castor does not contact
the rafter pipe.
To the outside of
the frame
To the inside of
the frame

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
18 Revision date: 01.01.16
FRAME ASSEMBLY
Gather the parts:
• All Rafter Assemblies (End and Interior)
• Pipe 1.315'' x 75'' swaged (#131S075)
• Pipe 1.315'' x 73.5'' plain) – See Side Profile Diagrams
in Quick Start section for quantities.
• Castors attached to 30R1904D rafter sections
• Lifts, ladders, tools, and assistants
Frame Assembly Procedure
1. Using the proper lifts and with assistance, carefully
stand the first end rafter—one with end clamps—and
install the first set of end pipes with castors. Verify that
the rafter is set so that the 102857 end clamps are
positioned as shown below.
2. Center the castor on the track pipe and secure the
30R1904D pipe to the rafter using two (2) FA4482B Tek
screws.
3. Verify rafter is plumb and brace it in place using cables,
ropes, or dimensional lumber. Leave bracing in place
until additional rafters and purlins are installed.
IMPORTANT: Brace
the first rafter in
position as needed to
keep it from moving.
Bracing is removed
after additional
rafters are installed
and secured to the
other rafters.
Photo shows the first end rafter and first interior rafter set
in place on the track pipe. End rafter is secured to the site
using one of the anchor stakes included with the building.
Crew members
install the short
30R1904D rafter
pipe with castor.
Before securing
the pipe to the
main rafter using
two FA4482B Tek
screws, verify
that the castor is
centered on the
track pipe.
NOTE: Sample rafter above is used to illustrate
bracing. Actual rafter may differ in design, width or
both.
4. Place an interior rafter–one without end clamps—into
position and install the short pipe with castors (Steps 1
and 2) above.
To the
inside of
the shelter
End Rafter

19
GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
Revision date: 01.01.16
5. Position one (1) cross connector (102547) near the top of the interior rafter assembly.
6. With assistance, take one (1) swaged 75" purlin sections (#131S075) and insert the plain end through the 102547
cross connector at the top of the interior rafter. Slide the pipe toward the end rafter and insert the plain end into the
102857 end clamp at the peak of the end rafter. Use the top, center mark as a guide.
7. Verify that both rafters are plumb and properly spaced (4' on center). Use the customer-built jig if available. Adjust
purlin as needed to align it with the center mark at the top of each rafter.
8. Tighten the 102547 cross connector on the interior rafter and tighten the end clamp of the end rafter to secure the
first section of purlin pipe.
NOTE: Do not allow the plain end of any purlin to extend beyond the end of the end rafter.
9. Secure each clamp to the rafter and to the purlin pipe. See the diagrams below.
Purlin
Tek Screw
Tek Screw
Interior Rafter
102547 Cross
Connector
Secure all 102547 and 102857 clamps to the rafter and to
the purlin pipes as shown above.
Do not allow the purlin to extend beyond the end
rafter.
End Rafter

GROWSPAN™ROLLING PREMIUM HIGH TUNNELS
20 Revision date: 01.01.16
11. Set the next interior rafter in place and install the castors and lower pipes. Repeat the steps to install the purlins.
Slide the plain end of the purlin pipe onto the swaged end of each installed purlin. Secure each purlin pipe joint
using an FA4482B Tek screw.
FRAME ASSEMBLY (continued)
10. Move to the remaining purlin positions and repeat steps 6-8 to install those pipes. Remember to use the jig to
space the rafters. If a jig is not present, use a tape measure to space the rafters. Spacing is 4' on-center.
End of Purlin
Pipe