FarmTek Growers Supply GrowSpan Gothic Pro 113836R User manual

1
GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.06.18 113836_37_38_39R
STK# DIMENSIONS
113836R 20' W x 12' H x 28' L
113837R 20' W x 12' H x 36' L
113838R 20' W x 12' H x 48' L
113839R 20' W x 12' H x 72' L
Photo may show a different but similar model.
Polycarbonate Roof with Film Roll-Up Side Panels
©2018 Growers Supply
All Rights Reserved. Reproduction
is prohibited without permission.
GrowSpan™
Gothic Pro Greenhouses and Systems

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
2113836_37_38_39R Revision date: 06.06.18
SQUARE TUBING INSTALLATION
Use the 102897 square tubing for all end wall framing. Use
the 104779 square tubing (plain ends) to secure overlap
seam between roof panels.
READ THIS DOCUMENT BEFORE YOU BEGIN.
Thank you for purchasing this GrowSpan™ greenhouse.
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 greenhouse. Please
read these instructions before you begin.
If you have any questions during the assembly, contact
Customer Service at 1-800-245-9881 for assistance.
SAFETY PRECAUTIONS
• Wear eye protection.
• Wear 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 greenhouse or framing during or
after construction.
• Do not occupy the greenhouse during high winds,
tornadoes, or hurricanes.
• Provide adequate ventilation if the structure is
enclosed.
• Do not store hazardous materials in the greenhouse.
• Provide proper ingress and egress to prevent
entrapment.
ANCHORING INSTRUCTIONS
Prior to assembling this greenhouse, please read the
MUST READ document included with the shipment.
WARNING: The anchor assembly is an integral part
of the greenhouse construction. Improper anchoring
may cause greenhouse instability and failure of the
structure. Failing to anchor the greenhouse properly
will void the manufacturer’s warranty and may cause
serious injury and damage.
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 greenhouse where large loads
such as snow and ice, large tree branches, or other
overhead obstacles could fall.
• Always check local building codes before you begin.
SITE
After choosing a location, proper preparation of the site is
essential. The following site characteristics will help
ensure the integrity of the structure.
• A level site is required. The site must be level to
properly and safely erect and anchor the structure.
• If the site is not level, use footings to provide a secure
base to assemble the structure. Pre-cast concrete
blocks, pressure-treated wood posts, or poured
footings are all acceptable when properly used. (Some
shelters use ground posts or rafter feet.)
• 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.
ASSEMBLY NOTE: Install Tek screws using a clutched
drill driver running approximately 750 RPM while applying
approximately 50 lbs of force.
Do not use an impact driver to install Tek screws!

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.06.18 113836_37_38_39R
ASSEMBLY PROCEDURE
Following the instructions as presented will help ensure
proper assembly of your greenhouse. Failing to follow
these steps may result in an improperly assembled and
anchored greenhouse and will void all warranty and
protection owner is entitled.
Steps outlining the assembly process are as follows:
1. Verify all parts are included in shipment. Notify
Customer Service for questions or concerns.
2. Read these instructions, the Must Read document, and
all additional documentation included with shipment
before you begin assembling.
3. Gather the tools, bracing, ladders (and lifts), and
assistants needed to assemble greenhouse.
4. Check weather before you install roof and
polycarbonate panels. Do not install panels on windy or
stormy days.
5. Re-evaluate location and site based on information and
precautions presented in documentation.
6. Prepare site (if applicable).
7. Assemble frame components in the order they are
presented.
8. Assemble frame including struts (if equipped).
9. Consult MUST READ document and properly anchor
assembled frame.
10. Install end wall framing.
11. Install, tighten, and secure end panels and doors.
12. Install main roof panels.
13. Read the care and maintenance information in next
column.
POLYCARBONATE PANELS
Do not allow panels to remain in direct sunlight with
protective film in place. Doing so will cause protective
film to become difficult if not impossible to remove before
installation.
Store panels indoors or cover with a light-colored
tarp until you are ready to install.
PANEL AND RIDGE CAP INSTALLATION NOTE
Depending on available equipment, it may be necessary to
construct a support structure to allow a person to reach top
of greenhouse from outside.
If a support structure has to be used, design structure to
support both the weight of structure and the person using it.
Use of a lift is strongly recommended.
CAUTION: Under no circumstances should support
structure allow any force or weight to be applied directly
to polycarbonate sheets! All supports must span
from rafter-to-rafter.
Consult a contractor if needed for additional information.
Take the necessary steps to protect polycarbonate panels.
POLYCARBONATE PANELS ARE NOT DESIGNED TO
SUPPORT WEIGHT.
NOTE: Position supports so they span from rafter-to-rafter
to protect panels. DO NOT use materials that will damage
or scratch panels. Cover panels to protect panel surface.
CAUTION: DO NOT place support structure directly
on polycarbonate panels; serious injury may occur.
Polycarbonate panels are not designed to support
excess weight.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
4113836_37_38_39R Revision date: 06.06.18
BASEBOARDS FOR FRAME — RECOMMENDED
These instructions describe installing a baseboard
(recommended) at ground level along each side of the
frame. Baseboard runs from front to back of frame.
This baseboard is not included and is customer supplied.
When installed properly the baseboard helps prevent
ground posts from sinking when anchored. Depending
on building, it also provides a surface to attach struts or
other building components. Secure baseboard using the
supplied FAH009B (1/4" x 4") bolts and FALB01B (1/4")
nuts.
Consult these instructions, or contact Customer Service for
additional information regarding baseboards.
Dotted line represents the anti-billow rope.
Example: Circles identify the ends of Rope #1.
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
Rope
#2
Rope
#3
REQUIRED TOOLS
The following list identifies main tools needed to
assemble shelter. Additional tools and supports may also
be required.
• Tape measure or measuring device; marker to mark
locations on the pipes
• Variable speed drill and power driver (cordless with
extra batteries works best)
• Metal-cutting saw; drill and drill bits
• Wrenches and socket set, or adjustable wrenches
• Scissors, utility knife, or tin snips; flat bar or putty knife
• Chalk line & caulk gun to apply sealant
• Hammers and gloves; adjustable and self-locking pliers
• Ladders, work platforms, and other machinery for lifting
designed to work safely at height of building
• Rope/cable for cover installation
UNPACK AND IDENTIFY PARTS
The following steps will ensure you have the necessary
parts before you begin.
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).
RECOMMENDED DIMENSIONS:
• 2" x 6" (minimum) treated or recycled plastic lumber
(supplied by customer).

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.06.18 113836_37_38_39R
The following graphics and photos will help you identify the
different parts and show you how they are used. (Not all
parts are shown.)
Swaged
Plain
Swaged and Plain Rafter Sections
FAH320B & FALB32B
Carriage Bolt & Hex Nut
102198
U-Channel Spring
CC6212
Fabric Clip
FA4482B
Tek Screw
QH1402
Band Clamp
102548
Cross Connector
104074
Square-to-Round Tube
Connect Bracket
102856
End Clamp
FAH009B & FALB01B
Carriage Bolt & Hex Nut
104624
Square Tube Fitting
QH1330
Angle Bracket
104213
Aluminum
U-Channel Profile
104548
End Cap Profile
Doors/Fans/Vents
102570
Aluminum
Channel
Aluminum 8'
H-Channel Profile
102717
Gearbox
Drive
102569
Bearing
102921 & FA4484B
Neo-bonded Galvanized
Washers and Long Tek Screws
111928
H-Channel -
Clear
104211
Double
U-Channel
103544
Mounting Plate
103496
Gear Box
ASSEMBLY NOTE: Install Tek screws using a clutched
drill driver running approximately 750 RPM while applying
approximately 50 lbs of force.
Do not use an impact driver to install Tek screws!

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
6113836_37_38_39R Revision date: 06.06.18
H-CHANNEL INSTALLATION INSTRUCTIONS
The new H-channel design requires installation of the at side facing out with channel side toward
the building. Some diagrams and photos in this document show installation of original H-channel with
channel side facing out. Design of new H-channel does not allow channel-side out installation.
Use the diagrams on this page to install H-channel with at side facing out.
ATTENTION: Use only 1-1/2" Tek screws to attach H-channel to building frame. Do not use
shorter screws. They will not hold. Do not use washers on Tek screws when installing
H-channel.
ATTENTION: Install all twin-wall polycarbonate panels with UV-protected side toward the sun.
UV-protected side
toward sun.
Install 1-1/2" Tek screws through
H-channel into building frame.
H-Channel
Center Groove
Flat side toward the sun.
Flat
Side
Channel

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.06.18 113836_37_38_39R
ATTENTION: Position purlins evenly during frame
assembly. Refer to Grid diagram near the back of
this guide (Quick Start section) to position purlins,
end clamps, and cross connectors.
End Rafter
Interior
Rafter
Baseboard is
supplied by
customer.
Finished
Grade
Purlins
Ground
Post
GrowSpan™
Gothic Pro Greenhouses
and Systems
OVERVIEW
See illustration below to identify main parts of greenhouse.
1. Locate required parts for each assembly procedure.
2. Assemble rafters and frame. Anchor frame.
3. Assemble and install end walls.
4. Prepare and attach end panels.
5. Prepare and attach roof panels.
6. Attach roll-up side panels and anti-billow ropes.
7. Install doors.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
8113836_37_38_39R Revision date: 06.06.18
LAY OUT BUILDING SITE
After site is prepared, lay out building site.
Taking these steps before assembling the shelter saves
time and ensures that the structure is positioned as
desired.
Ground posts must be driven to the proper depth. Width of
the shelter is measured from the center of one ground post
to the center of the remaining ground post.
SQUARE THE SITE
Gather parts:
• Ground posts
• 5/16" x 2-1/2" hex bolts (FAG336B)
• 5/16" nuts (FALB02B)
1. Identify a corner where a ground post will be positioned
and drive the first ground post into the ground.
NOTE: Insert ground post driver into top of ground post
to protect post and drive post. Top of post will be one
(1) foot above finished grade when properly driven.
3. Use a transit or line level to drive the second corner
post to the same depth as the first ground post.
4. Sting a line at least as long as the building from the first
stake at 90°.
NOTE: A transit can be used to ensure an accurate 90°
angle, or the 3-4-5 rule can be used. Refer to diagram.
Using multiples of 3-4-5 such as 6-8-10 or 12-16-20
helps to maintain an accurate 90° angle.
5. After squaring the position of the building, measure
the length (center-to-center) and drive the next corner
ground post.
6. Repeat the same step for the last corner post.
NOTE: Distance measured diagonally between corner
posts must be equal for building to be square.
7. Check all dimensions (and adjust if needed) before
driving remaining posts to the required height.
8. After all corner posts are accurately installed, tie a
string line between tops of corner ground posts on the
same side of the shelter. String is used to identify the
tops of all remaining posts. String must remain tight
and level.
9. Use a tape measure to mark the 48" on-center
locations of the remaining ground posts.
10. Drive remaining ground posts at the required 48" on-
center width and the height identified by the string.
NOTE: Verify that holes in posts are in the proper
position and that each post is plumb and driven to the
correct depth.
11. Continue with the Rafter Assembly steps that follow.
ATTENTION: Position pre-drilled holes facing inside/
outside of shelter so they align with bolt holes in rafter
pipes.
To align bolt holes in ground posts with those in the
rafter after driving posts, insert a tapered rod or pry bar
into a ground post bolt hole and turn post.
2. After first corner ground post is in place, string a line
the width of building (center-to-center) and drive the
second ground post into the ground just enough to hold
it in place.
Outside of
Shelter
Front
Back
Inside of
Shelter
Ground
Post

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.06.18 113836_37_38_39R
ASSEMBLE GREENHOUSE FRAME
After site is prepared and an inventory of parts is complete,
continue with rafter assembly.
NOTE: All rafter assemblies consist of rafter tubes and
purlin clamps. Consult the rafter diagram in the Quick
Start section near the back of these instructions before and
during assembly.
Assistance is required to assemble the greenhouse.
RAFTER ASSEMBLY
Gather parts:
• Rafter Pipe (#20G166SS401D)
• Rafter Pipe (#20G166SS403)
• Rafter Pipe (#166S064)
• End Clamps (#102856)
• Tek Screws (# FA4482B)
• Nut Setter 3/8'' x 2-9/16 Magnetic
END RAFTER ASSEMBLY
End rafters include purlin end clamps and band clamps.
Install purlin end clamps before the different pipes are
connected. Band clamps for side struts are installed when
the two (2) end rafters are set onto the ground posts.
1. Select the five (5) pipes needed to assemble the first
end rafter and arrange on a level surface.
2. Slide four (4) end purlin clamps (two on each side of
the peak) onto rafter pipes. Position clamps as shown.
NOTE: Position all purlin clamps at or near rafter
pipe joints. Consult Quick Start section for additional
information.
3. After slipping clamps over rafter pipes, insert swaged
end of rafter pipes into plain ends to assemble rafter.
4. Once rafter is assembled, install an FA4482B Tek
screw through rafter pipes to secure each joint.
IMPORTANT: To prevent damage to cover and end
panels, position Tek screws so heads do not contact
these covers when installed.
5. Repeat steps to assemble the remaining end rafter and
set both end rafters aside.
End clamp as seen from inside the assembled frame.
End clamp as seen from inside the assembled frame.
(#20G166SS401D)
(#166S064)
(#20G166SS403)

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
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INTERIOR RAFTER ASSEMBLY
Complete the following steps to assemble interior rafters.
1. Select pipes for first interior rafter assembly and
position these on ground as shown.
IMPORTANT: Interior rafters do not use end clamps.
Instead, cross connectors are attached during the
frame assembly.
2. Insert swaged ends of rafter pipes into plain ends and
secure each joint with an FA4482B Tek screw.
NOTE: For longer frames, it may be easier to assemble
a few rafters at a time and then begin to assemble the
frame. Position Tek screws so they will not contact
any cover material when frame is assembled.
3. Once rafters are assembled, assemble frame.
RAFTER ASSEMBLY (continued)
(#20G166SS401D)
(#166S064)
(#20G166SS403)
Space below reserved for customer notes.

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.06.18 113836_37_38_39R
Gather parts:
• All rafter assemblies and purlin pipe
• Band clamps (#QH1402)
• Cross connector (#102548)
• 5/16" x 2-1/2" machine bolts (FAG336B) and
5/16" nuts (FALB02B)
• Lifts, ladders, and assistants
• Rope or cable
1. Carefully stand the first end rafter, slide a band clamp
onto each rafter leg, and place rafter in first set of
ground posts.
Brace the rafter in place to keep it straight. Depending
on the frame size, a lift and additional assistants may
be needed. Consult Quick Start section for details.
Rafter shown differs in design.
2. Secure rafter to ground posts using 5/16" x 2 1/2"
(FAG336B) bolts and nuts (FALB02B). Use the top
hole in ground post to secure rafter.
Rafter shown differs in design.
ATTENTION: Stand the rafter so the nuts and bolts
of the end clamps are to the inside of the frame. See
diagram—Step 8.
3. Use rope or cable to keep the rafter in position.
4. Carefully position first interior rafter in place and secure
to the ground posts as previously described.
Rafter shown differs in design.
1st Interior Rafter
End Rafter
FRAME ASSEMBLY
NOTE: Baseboards (strongly recommended) shown in the
diagrams throughout these instructions are not included
and must be supplied by the customer.
Contact customer service at 1-800-245-9881 to purchase
baseboards, or for additional information.
Front
Back
Inside of
Shelter
Outside of
Shelter
Rafter
Ground
Post
Band
Clamp

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
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FRAME ASSEMBLY (continued)
5. As second rafter is steadied, take one section of purlin
pipe (131S075).
6. Insert purlin pipe through an upper end clamp of the
end rafter and through a cross connector placed in the
same position on interior rafter. Consult Quick Start
section (Grid diagram) for purlin location per frame.
7. Align plain end of purlin with center of end rafter.
8. Tighten end clamp and secure it to rafter with an
FA4482B Tek screw.
Purlin
End Rafter
10. Move to the interior rafter, verify that rafter spacing is
forty-eight inches (48") on-center (adjust as needed),
and tighten cross connector.
Interior Rafter
Purlin
11. Secure cross connector to rafter and to purlin using
FA4482B Tek screws. See details in Quick Start section
if needed.
12. Repeat Steps 6-12 to install the first section of each
purlin for the first two rafters.
13. Choose another interior rafter assembly and set it in
position. Do not use the remaining end rafter.
14. Secure rafter legs to ground posts as previously
described and steady the rafter.
15. Add another pipe and clamp to each purlin run. Verify
that the distance between rafters is 48" center-to-
center. Adjust rafter forward or backward as needed to
maintain dimension.
Interior Rafter
End Rafter
Do not allow the
purlin to extend
beyond the end
rafter.
End rafter view Interior rafter view
20' wide
center-to-center
Dashed line
shows finished
grade.
9. Install an FA4482B Tek screw through end clamp and
into purlin pipe.
NOTE: Customer-supplied baseboards are shown in
the diagramsabove. See baseboard information on the
following pages.

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
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16. Secure clamp and purlin pipe. Secure purlin pipe joint
using an FA4482B Tek screw.
17. Repeat the above steps as needed to stand and secure
the remaining interior rafters and purlins to complete
the frame assembly.
18. Slide a band clamp onto each leg of remaining end
rafter, secure rafter to ground posts, and attach purlins
to it. Verify that end clamps are positioned with nut and
bolt to the inside of assembled frame. Refer to Quick
Start section and previous diagrams if needed.
NOTE: If last end rafter is plumb and final purlin
pipe extends beyond end of rafter, cut purlin pipe to
required length.
FRAME ASSEMBLY (continued)
Dashed line shows
ground level.
Frame length and design may differ from actual frame.
19. Once all rafters are set and all purlins are in place
and secure, return to each pipe splice of each purlin
and verify that a Tek screw is installed. Install screw if
needed.
20. Remove any temporary bracing (if needed) and install
customer-supplied baseboards and the side struts.
BASEBOARD INSTALLATION — RECOMMENDED
After installing all panels, installing a baseboard is
recommended. Minimum size is 2" x 6". Length
determined by building length. Materials for
baseboards are supplied by the customer.
Fasteners to secure baseboards to frame are included
with building.
A baseboard (2" x 6" minimum) helps keep ground posts
properly seated after anchors are installed.
BASEBOARD INSTALLATION (RECOMMENDED )
Gather parts:
• 2" x 6" (minimum) treated or recycled plastic lumber
(supplied by customer).
• 1/4" x 4" Carriage bolts and 1/4" Nuts (included)
The following procedure describes one way to install the
baseboards. Size and type of baseboard may require
additional installation steps.
Ground
Level
Inside of
Shelter
Outside of
Shelter
ATTENTION: Never attach two boards to the same ground
post. All baseboard splices should be between rafters as
shown above.
Use a short section of baseboard to secure separate
baseboards at a splice. Customer supplies all materials
to secure all baseboard splices.
General installation steps:
1. Position baseboard as shown and clamp or hold in
place against ground posts.
2. From inside the greenhouse, drill 5/16" holes through
ground posts, panels, and baseboard. (Ground posts
may come pre-drilled.)
3. Secure with 1/4" x 4" carriage bolts and nuts. Insert
from outside.
Depending on baseboard dimensions, countersink bolt
holes in baseboard as needed to allow bolts to reach
through all components.
4. Continue by installing side struts. See next page.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
14 113836_37_38_39R Revision date: 06.06.18
SIDE STRUT INSTALLATION
There are four (4) side struts for the shelter. These struts
are positioned between the end rafters and the first interior
rafter on each side. Complete these steps to install the four
(4) side struts:
Gather parts:
• Struts
• Band Clamps (#QH1402)
• Lag screw or nut and bolt (supplied by customer)
1. Locate one strut and position it between end rafter and
first interior rafter as shown below.
Strut
End Rafter
Interior
Rafter
Baseboard is required
for this procedure.
Customer supplies the
baseboard.
2. Attach one end of strut to band clamp as shown.
Strut
End Rafter
Band Clamp
3. Attach remaining end of strut to baseboard using a lag
screw or nut and bolt (not included). See diagram that
follows for location.
NOTE: A baseboard provides a place to attach each
strut and helps keep ground posts at the required
depth. Customer is responsible for providing a
baseboard for this frame. If no baseboard is present,
attach strut to ground post using a FA4484B Tek
screws or other customer-supplied fasteners.
4. Repeat above steps to attach the remaining side struts.
5. After securing struts, verify that each clamps is secured
with a FA4482B Tek screw to the rafter.
6. Verify that each pipe splice (purlin and rafter) is
secured with an FA4482B Tek screw.
7. Complete the next procedure to anchor the assembled
frame.
ANCHOR THE ASSEMBLED FRAME
At this point, anchor the greenhouse frame. Consult the
MUST READ document for anchoring information and
suggestions. Please call customer service at 1-800-245-
9881 for additional anchoring information.
CAUTION: The anchor assembly is an integral part of
the greenhouse construction. Improper anchoring may
cause instability and failure of the structure to perform
as designed. Failing to anchor the shelter properly
will void the manufacturer’s warranty and may cause
serious injury and damage.
Photo shows the strut attached
to the inside of the customer-
supplied baseboard.
Attach strut
as shown.
End
Rafter
Finished Grade
Baseboard
NOTE: Head of bolt on band clamp must face toward
the outside of shelter.
Finished Grade

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
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END WALL INSTALLATION
The steps to install end walls for the greenhouse include
the following:
1. Install end wall framing. (See the diagrams in the Quick
Start section near the back of these instructions. Read
the accessories note below.)
2. Prepare polycarbonate end panels and attach.
3. Assemble doors and attach.
INSTALL END WALL FRAMING (Front and Back)
Site variations and different methods for anchoring the
greenhouse may require slight changes to be made to
these instructions. It is the responsibility of the owner/
builder to adapt these instructions as needed to adjust for
these and other differences.
A NOTE ABOUT INSTALLING THE END WALL
FRAMING FOR OPTIONAL HEATERS, VENT FANS, AND
MOTORIZED SHUTTERS (if equipped):
Optional accessories such as heaters, vent fans and
motorized shutter units are typically installed in the end
walls of this greenhouse. Additional horizontal framing
(included) is installed between the vertical end wall frame
tubes to mount these accessories. The spacing shown for
the end wall supports on the end frame diagrams may be
too narrow for the installation of some larger accessories.
Diagrams do not show framing for the accessories.
When framing the end wall, consult the installation
instructions for the accessories (if equipped), or measure
the width of the accessory to accurately space and position
the end frame tubes.
Consult the panel installation diagrams in the Quick Start
section to identify the verticals that can be moved.
Before installing any greenhouse accessory, adhere to the
following:
• Consult the end frame diagrams before installing the
accessory horizontal framing.
• If labeled, move only those verticals labeled as "NON-
CRITICAL" on end frame diagrams when deciding
where to install the additional horizontal framing for
accessories.
• Consult the diagrams in the Quick Start section
showing the polycarbonate panel locations and the
locations of the aluminum trim and profile before
repositioning any end wall vertical.
• DO NOT REPOSITION THE END WALL VERTICALS
USED AT THE SEAM OF TWO (2) POLYCARBONATE
PANELS.
• Always consult the installation guides that shipped
with the accessory for additional precautions,
recommendations, and safety requirements.
• Before installing any electrical accessory, consult a
professional electrician for precautions and additional
assistance.
• For gas heaters, a professional, qualified service
technician must install the unit.
Complete these steps to install the accessory framing:
1. Based on the installation requirements and precautions
of the accessory, choose a location in the end wall to
mount the accessory, and cut a 1.5" x 1.5" frame tube
to the required length for framing.
2. Attach these horizontal frame tubes between the
vertical frame tubes of the end wall (at the required
height determined by the installation instructions
included with that accessory) using angle brackets.
INSTALL END WALL FRAME
Refer to the end frame diagrams (Quick Start section). The
materials and parts needed to assemble end wall frame
include:
• Square Tube #102897 and #104779
• Angle Brackets (#QH1330) & Band Clamp (#QH1402)
• Square Tube Fitting (#104624)
• Square-to-Round Tube Connect Bracket (#104074)
• Carriage Bolt (#FAH320) and Nut (#FALB32B)
• Tek Screws (#FA4482B)
1. Locate the square tubing for base tube. Base tube
consists of 99" swaged tubes (102987) and one (1)
104779 square pipe cut-to-fit.
2. Insert the swaged ends of the tubing into the plain ends
to connect the pieces, measure, and cut to length.
3. Position this assembled base tube on the ground
between end rafter ground posts (front of greenhouse).
Base tube will be directly below and in line with rafter.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
16 113836_37_38_39R Revision date: 06.06.18
4. Secure base tube using an angle bracket and FA4482B
Tek screws at each end.
INSTALL THE END WALL FRAME (continued)
The bracket
shown in this
diagram can
be installed
with either its
short section
(as shown) or
the long section
attached to the
ground post.
Base Tube
Ground
Post
5. On the base tube surface facing the inside of the
greenhouse, install an FA4482B Tek screw at each pipe
joint. Next, locate and mark the center of base tube.
6. Consult the end frame diagram (Quick Start section)
and mark the rough opening for the double door.
7. Place band clamps on end rafter above the door as
shown below. DO NOT TIGHTEN THE BOLTS AT
THIS TIME.
ATTENTION: Consult the diagrams in the Quick Start
section to view the frame for this shelter.
8. Next, consult end frame diagram in Quick Start section.
Choose one (1) square tube (#102897) and insert the
swaged end into a 104779 tube.
9. Measure the required length for the frame tube.
NOTE: Length is measured between top of base tube
and band clamp (Step 7) on rafter.
10. On assembled frame member, mark length determined
in Step 9 and subtract amount needed to account
for square-to-round tube connect bracket, which will
be attached to top of frame tube. See diagram below.
11. Cut the tube to length.
12. Select a 104074 square-to-round tube bracket and
attach bracket to one end of frame member. Use a
5/16" drill bit to drill a hole through tube. Attach bracket
to tube using a FALB32B nut and FAH320B bolt.
13. Repeat Steps 8-12 to construct the remaining vertical
frame tube for the door.
14. Install the frame tubes. Use the bolt in the band clamp
to attach the bracket to the band clamp. DO NOT
TIGHTEN AT THIS TIME.
NOTE: The heads of the bolts for each clamp are to the
outside (or front/back) of the greenhouse. At this point,
the two vertical door frame members should be loosely
attached to the end rafter.
End Rafter
Square-to-
Round Tube
Connect
Bracket–
104074
Front (or outside)
of the greenhouse
Vertical Door
Frame Tube FAH320 Bolt &
FALB32B Nut
Finished Grade

17
GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.06.18 113836_37_38_39R
15. Using the marks on the base tube for the rough door
opening, attach bottom of each vertical frame member
to base tube using an angle bracket and FA4482B Tek
screws. Consult the end frame diagram if needed.
INSTALL THE END WALL FRAME (continued)
16. With vertical door frame tubes attached to base tube,
mark the height of rough door opening.
NOTE: Consult the End Frame Diagrams in Quick Start
section. Frame shown may differ from actual frame.
17. Using a level (or other means), plumb the door frame
tubes and tighten the band clamp bolts to lock frame
members in place.
18. Install an FA4482B Tek screw through the back side of
each door frame tube to secure the tube splice.
19. Choose a 102897 tube for door header and cut length
to the width of rough door opening. Cut off part of
swaged end. Do not cut the plain end.
20. Using two angle brackets, attach header to end wall
assembly between door frame tubes as shown.
NOTE: Inside dimensions are shown. Diagrams may
show a different frame.
21. Check width of rough opening at top and bottom.
Adjust if needed. Check opening for square. Diagonal
dimensions from corner-to-corner should be the same.
22. Cut the tube for the short, end wall supports between
header and end rafter.
92-1/4" 92-1/4"
Mark Here
Height of rough
door opening
Header
Height of rough
door opening
92-1/4"
96-3/4"
Width
Door Opening
Angle Bracket
Mark
Base Tube
Center of
Door Frame
Tube
23. Attach as shown above and in Quick Start details.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
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24. Using end frame diagram, determine the number of
remaining vertical end frame supports. Place one band
clamp on end rafter for each.
25. Using end frame diagrams (Quick Start section), mark
locations of the remaining vertical end wall supports on
the base tube.
26. Choose tubes for each remaining vertical support.
27. Use the steps presented earlier in these instructions
and the end frame diagrams to measure and cut each
section of square tubing for the remaining vertical
frame members.
INSTALL THE END WALL FRAME (continued)
Front (or outside)
of the greenhouse
Square-to-
Round Tube
Connect
Bracket
Band
Clamp
Position all screws, bolts
and clamps so they will
not damage the end wall
panels when panels
are attached to the
end wall frame.
End Rafter
30. Align center of frame member with center mark on base
tube and attach top of frame member to band clamp on
rafter. Do not tighten.
31. Verify that frame member is plumb and use FA4482B
Tek screws to secure 104624 fitting to base tube and
frame member.
32. Tighten band clamp and install an FA4482B short Tek
screw through clamp and into rafter.
33. Repeat as needed to assemble and install remaining
vertical end wall supports.
34. Return to each frame member and install an FA4482B
Tek screw through the backside of each tube fitting to
secure end frame support to tube fitting.
35. Return to each band clamp, 104624 connector, and
square tube splice and verify that a Tek screw is
installed. Install an FA4482B Tek screw if needed.
Inside view
of end rafter
ATTENTION: Remember to subtract the amount
needed to account for the square-to-round tube
connect bracket that will be attached to the top of each
remaining frame member.
28. Choose a square-to-round tube connect bracket and
attach bracket to one end of vertical frame member.
Use a 5/16" drill bit to drill a hole through tube and
attach bracket to tube using a nut and bolt.
29. Slide a 104624 1-way connector onto the frame tube
and set assembly on base tube of end frame.
Center Mark
FA4482B
Tek Screw
FAH320 Bolt &
FALB32B Nut

19
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Revision date: 06.06.18 113836_37_38_39R
INSTALL END WALL FRAMING (BACK)
Greenhouse end walls (front and back) are identical except
as noted below and on end frame diagrams.
If back wall includes optional double door kit (additional
purchase required), repeat End Wall Installation procedure
and install framing for remaining end wall.
If back wall does not include an optional double door kit,
consult the end frame diagram to install the vertical frame
tubes in the framed door opening.
Dashed lines show where additional frame tubes are
installed when the optional double door is not present.
Consult the end frame diagram for additional information.
1. Read note regarding installation of optional accessories
at the beginning of the end wall installation section.
2. Cut tubes to required length and attach to end wall
framing.
3. Install frame tubes as previous described.
4. Continue with end panel installation.
Space below reserved for customer notes.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
20 113836_37_38_39R Revision date: 06.06.18
END PANEL INSTALLATION
After end frames are assembled, install the polycarbonate
panels. Steps that follow describe one way to complete the
end wall panel installation.
Materials and parts needed to install end panels include:
• Polycarbonate panels and white vent tape
• Aluminum U-Channel profile (#104213)
• Aluminum 8' H-Channel profile
• Tek screws (#FA4484B)
• Neo-bonded, galvanized washers (#102921B)
Read the following information before starting:
• U-channel (104213) is used to finish sides and top
edges of some polycarbonate panels.
• Aluminum 8' H-Channel is used to join two (2) separate
polycarbonate panels at the seam.
• FA4484B Tek screws and 102921B galvanized washers
are used to secure aluminum channel and panels to
end wall frame.
• Install polycarbonate panels with UV-protected side
to the outside toward the sun. Mark this side with a
marker if needed after removing the protective film.
ATTENTION: Protective film must be removed from the
polycarbonate panels. Allowing film to remain intact
and in direct sunlight will make the film difficult if
not impossible to remove.
• During preparation, rest panel edges on cardboard or
other material to protect them from dirt and damage.
• Seal bottom edge of panels with white vent tape.
• Consult polycarbonate panels (Quick Start section) for
the location and lengths of each panel. The diagrams
are located near the back of these instructions.
ATTENTION: Panels must be positioned as shown on
panel diagrams. Using a panel in the incorrect place can
affect placement of subsequent panels. In addition, the
amount of aluminum profile used between panels and to
finish panel edges may not be adequate if additional seams
are created. Begin at the door end of the building.
INSTALLING ACCESSORIES
Install all accessories (fans, vents, heaters, etc.) after
installing all polycarbonate sheets.
Complete the following general steps to install end panels.
1. Consult panel location diagrams and select a panel.
Begin at the edge of door opening and work toward
outside edge of end wall.
See X in diagram below for first panel.
NOTE: Remove the protective film. When needed, an
upper panel is cut to length after attaching it to the end
wall frame and rafter. Use the rafter profile as a guide.
2. Apply vent tape to bottom of lower panel and then
install aluminum u-channel profile (104213) along panel
edge adjacent to door as shown on panel diagram.
Mark UV Side X
3. Place panel in position, attach it to end wall framing
using 102921B neo-bonded washers and long,
FA4484B Tek screws. See diagrams on next page.
Always remove protective film. Mark and install the UV-
protected side to the outside (toward the sun).
Dashed line and small arrows (above) show where to
install vent tape.
X