GrowSpan Gothic Pro Series User Manual

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

GrowSpan™

Gothic Pro Greenhouses and Systems

©2018 Growers Supply
All Rights Reserved. Reproduction
is prohibited without permission.

Revision date: 06.07.18

Photo may show a different but similar model.

STK# DIMENSIONS

106306 26' W x 12' H x 28' L
106307 26' W x 12' H x 36' L
106308 26' W x 12' H x 48' L
106309 26' W x 12' H x 72' L

1

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

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

YOU MUST READ THIS DOCUMENT BEFORE YOU
BEGIN TO ASSEMBLE THE SHELTER.

location.

• Never erect the structure under power lines.

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.

• 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.)

• 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.

• 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.

DOUBLE-LAYER FILM INSTALLATION

Greenhouses equipped with a double-layer lm include
a layer that is Infra Red (IR) Retention lm.

IMPORTANT! During cover installation, the IR film
must be installed first! Examine the film and install
it according to the instructions printed on the film.

2

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

ASSEMBLY PROCEDURE

Following the instructions as presented will help ensure
the 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 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 greenhouse.

3. Gather the tools, bracing, ladders (and lifts), and
assistance needed to assemble the greenhouse.

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. Consult the MUST READ document and properly
anchor the assembled frame.

10. Install the End Wall framing. (These are optional items
for some shelter types.)

11. Install, tighten, and secure the End Wall end panels
and doors. (These are optional items for some
shelters.)

12. Install, tighten, and secure the main cover. This applies
to fabric and film covers that stretch over the frame
assembly.

13. Read the Care and Maintenance information at the end
of these instructions.

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.

• Band Clamp: Clamp used to connect the end wall
framing to the rafter pipe. In some cases, band
clamps are also used to connect diagonal struts to the
assembled frame.

• Clip or Fabric Clip: A short, half-section piece of
conduit (cut lengthwise) used to secure the end panel
cover to the leg or rafter assembly. The clip or fabric
clip is typically fastened in place using self tapping Tek
screw.

• Conduit: An assembly of pipes used to secure the
main cover 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 to
prevent separation. Some conduit assemblies are used
to secure larger end panels and main covers. These
conduits typically consist of sections of PVC tubing
glued at the joints.

• Cross Connector: Any one of the metal brackets
used to "connect" or secure a purlin to a rafter. Cross­connectors are typically pictured on the Pictorial Parts
Guide page or in the Quick Start section (if present).

• End Panel: Fabric or material used to cover the end
wall assemblies. End wall assemblies are optional for
many shelters.

• 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 framework that supports the main cover.
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
work 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.

Revision date: 06.07.18

3

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

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.

SPECIAL NOTE: Baseboards for Frame

These instructions describe installing a baseboard
(recommended) at ground level along each side of the
frame. The baseboard runs from the front to the back of the
frame.

• Tape measure or measuring device

• Marker to mark locations on the pipes

• Variable speed drill and impact driver (cordless with
extra batteries works best)

• Metal-cutting saw

• Wrenches and impact socket set, or an adjustable
wrench

• Scissors, utility knife, or tin snips

• Hammers and gloves

• Adjustable pliers and self-locking pliers

• Ladders, work platforms, and other machinery for lifting
designed to work safely at the height of the building

• Rope/cable for cover installation

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.

This baseboard is not included with the shipment and must
be supplied by the customer. Treated or recycled plastic
lumber works well for a baseboard.

The baseboard, when installed properly, 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.

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.

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).

Rope

#1

Rope

#2

Dotted line represents the anti-billow rope.
Example: Circles identify the ends of Rope #1.

Rope

#3

4

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

The following graphics and photos will help you identify the
different parts and show you how they are used. (Not all
parts are shown.)

FA4482B
Tek Screw

102570
Aluminum Channel

104213
Aluminum
U-Channel Profile

CC6212
Fabric Clip

QH1402
Band Clamp

Aluminum 8'
H-Channel Profile

104548
End Cap Profile
Doors/Fans/Vents

103544
Mounting Plate

102717
Gearbox Drive

102197
Aluminum
U-Channel

102569
Bearing

FAH009B & FALB01B
Carriage Bolt & Hex Nut

102548
Cross Connector

102856
End Clamp

102921 & FA4484B
Neo-bonded Galvanized
Washers and Long Tek Screws

FAH320B & FALB32B
Carriage Bolt & Hex Nut

104074
Square-to-Round Tube
Connect Bracket

103496
Gear Box

102198
U-Channel Spring

Revision date: 06.07.18

QH1330
Angle Bracket

104624
Square Tube Fitting

Unswaged

Swaged

Swaged and Unswaged Rafter Sections
(not all pieces are shown)

5

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

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.

Flat

Side

Channel

UV-protected side

toward sun.

Flat side toward the sun.

Install 1-1/2" Tek screws through
H-channel into building frame.

Center Groove

H-Channel

ATTENTION: Install all twin-wall poly carbonate panels with UV-protected side toward the sun.

6

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

Gothic Pro Greenhouses and Systems

OVERVIEW

This section is an overview of the process for assembling
your Gothic Pro Greenhouse. For details, please
see section, Assembling the Gothic Pro Greenhouse
Components. See illustration below to identify main parts of
greenhouse.

1. Locate the required parts for each assembly procedure.

2. Assemble the rafters and frame, and square the frame.

3. Prepare and attach end panels.

GrowSpan™

ATTENTION: Position purlins evenly during the
frame assembly. Use the rafter pipe joints as
guides when installing the end clamps, cross
connectors, and purlins.

4. Attach main cover and Twist-of-the-Wrist assembly.

End Rafter

Interior
Rafter

Purlins

Ground
Post

Revision date: 06.07.18

Baseboard is
supplied by
customer.

Ground
Level

7

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

LAY OUT THE BUILDING SITE

After the site is prepared, lay out the 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 the Parts:

• Ground Posts

• 5/16" x 2-1/2" Machine Bolts

• 5/16" Nuts

1. Identify a corner where a ground post will be positioned
and drive the first ground post into the ground.

NOTE: Insert the ground post driver into the top of
the ground post to protect the post and drive the post
into the ground. The top of the post will be one (1) foot
above the finished grade when properly driven.

Ground
Post

3. Use a transit or line level to drive the second corner

4. Sting a line at least as long as the building from the first

5. After squaring the position of the building, measure

post to the same depth as the first ground post.

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.

the length (center-to-center) and drive the next corner
ground post.

Outside of
Shelter

Inside of
Shelter

ATTENTION: Position the pre-drilled holes facing to the
inside/outside of the shelter so they can be aligned with
the bolt holes in the rafter legs.

To align the bolt holes in the ground posts with those
in the rafter after driving the ground posts, insert a
tapered rod or pry bar into a ground post bolt hole and
turn the post using the rod or pry bar.

2. After the first corner ground post is in place, string a
line the width of the building (center-to-center) and
drive the second ground post into the ground just
enough to hold it in place.

6. Repeat the same step for the last corner post.

NOTE: The distance measured diagonally between
corner posts must be equal for the building to be
square.

7. Check all dimensions (and adjust if needed) before
driving the remaining posts to the required height.

8. After all corner posts are accurately installed, tie a
string line between the tops of the corner ground posts
on the same side of the shelter. The string is used to
identify the tops of all remaining ground posts. The
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 the remaining ground posts into the ground at the
required 48" on-center width and the height identified
by the string.

NOTE: Verify that the holes in the ground 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.

8

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GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

ASSEMBLING THE GOTHIC PRO GREENHOUSE
FRAME COMPONENTS

After the site is prepared and an inventory of parts is
complete, continue with the rafter assembly.

NOTE: All rafter assemblies consist of rafter tubes and
purlin clamps. Consult the rafter diagram in the Quick
Start section of these instructions before and during the
rafter assembly process.

Assistance is required to assemble the greenhouse frame.

RAFTER ASSEMBLY

Gather the Parts:

• Rafter Pipe (#26G166SS403)

• Rafter Pipe (#26G166SS401D)

• Rafter Pipe (#166S099)

• End Clamps (#102856)

• Tek Screws (# FA4482B)

• Nut Setter 3/8'' x 2-9/16 Magnetic

2. Slide four (4) end purlin clamps (two on each side of
the peak) over the rafter pipes. Position all end clamps
at the rafter pipe joints. Position the end clamps as
shown.

End clamp as seen from inside the assembled frame.

NOTE: Position all purlin clamps at the rafter pipe
joints. Consult the Quick Start section for additional
information.

3. After slipping the clamps over the rafter pipes, insert
the swaged end of the rafter pipes into the plain ends
of the pipes to assemble the rafter.

END RAFTER ASSEMBLY

The end rafters include purlin end clamps and band
clamps. Install the purlin end clamps before the different
pipes of the rafters are connected. The band clamps for the
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.

(#26G166SS403)

(#166S099)

(#26G166SS401D)

4. Once the rafter is assembled, reposition the purlin
clamps over the pipe joints and install a Tek screw
through the rafter pipes to secure each joint.

End clamp as seen from inside the assembled frame.

IMPORTANT: To prevent damage to the cover and end
panels (if equipped), position the Tek screws so the
heads do not contact the cover when it is installed.

5. Repeat steps for to assemble the remaining end rafter
and set both end rafters aside.

Revision date: 06.07.18

9

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

RAFTER ASSEMBLY (continued)

INTERIOR RAFTER ASSEMBLY

Complete the following steps for the interior rafters.

FRAME ASSEMBLY

After all ground posts are driven in place and rafters are
assembled, assemble the frame.

1. Select the pipes for the first interior rafter assembly and
position these on the ground as shown.

(#26G166SS403)

(#166S099)

(#26G166SS401D)

IMPORTANT: Interior rafters do not use end clamps.
Instead, cross connectors are attached during the
frame assembly.

2. Insert the swaged ends of the rafter pipes into the plain
ends of the pipes and secure each joint with a Tek
screw.

NOTE: The 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.

ASSEMBLE AND PRE-MARK THE PURLINS
The following steps describe one way to speed the
assembly process and eliminate the need to measure each
purlin as it is installed. Pre-marking the purlins ensures that
an accurate spacing of the rafter assemblies is achieved
and maintained during assembly.

Gather the Parts:

• Pipe 1.315'' x 75'' swaged (#131S075)

• Pipe 1.315'' x XX'' plain (#131P0XX)

• Marker and tape measure

NOTE: The purlins are part of the assembled frame and
run perpendicular to the rafter assemblies. Each purlin
consists of 1.315" x 75" (#131S075) swaged pipes (number
is determined by shelter length) and one (1) 1.315" x XX"
(#131P0XX) plain pipe.

ATTENTION: The XX" represents the remaining length
required to reach the end of the shelter. Consult the Spec
Sheet for part identification.

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 the
cover when the frame is assembled.

3. Once rafters are assembled, assemble the frame.

10

1. Select the required pipe sections for one purlin and
connect these by inserting the swaged ends of the
pipes into the plain ends until the entire purlin is
assembled.

NOTE: Assemble the purlins in a location that is
accessible during the assembly of the frame, but will
not interfere with the process of lifting and setting the
rafters.

2. Verify that each pipe joint is properly seated.

NOTE: These pipes must be separated during the
assembly procedure. Do not fasten them together at
this time.

3. For the 48" rafter spacing, measure forty-eight and
three-quarters inches (48-3/4") from one end of the
assembled purlin and mark the distance on the pipe.

NOTE: This first measurement is three-quarters (3/4)
of an inch longer than the on-center rafter spacing
to account for the length of purlin pipe that extends
through the end purlin clamp of the first end rafter.

Revision date: 06.07.18

FRAME ASSEMBLY (continued)

4. From the location marked in the previous step,
measure forty-eight inches (48") and make another
mark on the assembled purlin.

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

2. Secure the leg pipes to the ground posts using the
5/16" x 2 1/2" machine bolts and nuts.

Rafter

5. Continue to mark the purlin in 48" intervals until all
locations are marked. These marks help to maintain
the 48" on-center rafter spacing of the shelter during
assembly.

6. Repeat this procedure until all assembled purlins are
marked.

7. After assembling all rafters and pre-marking the purlins,
assemble the frame.

ASSEMBLE THE FRAME

After all ground posts are driven in place, rafters are
assembled and purlins pre-marked, assemble the frame.

Gather the parts:

• All rafter assemblies and pre-marked purlins

• Band clamps (#QH1402)

• Cross connector (#102548)

• 5/16" x 2-1/2" machine bolts and 5/16" nuts

• Lifts, ladders, and assistants

Band
Clamp

Inside of

Shelter

Outside of

Shelter

Ground
Post

3. Use rope or cable to keep the rafter in position.

• Rope or cable

1. Carefully stand the first end rafter, slide a band clamp
onto each rafter leg, and place the leg pipes in the 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.

4. Carefully position the first interior rafter in place and
secure the leg pipes to the ground posts.

End Rafter

1st Interior 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.

Revision date: 06.07.18

Rafter shown differs in design.

11

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

FRAME ASSEMBLY (continued)

5. As the second rafter is steadied, remove one section of
pipe from one assembled purlin.

NOTE: Work from the end of the purlin where the
first measurement was taken during the pre-marking
procedure.

6. Insert the purlin pipe through an upper end clamp of
the end rafter and through a cross connector placed in
the same position on the interior rafter. Consult Quick
Start section for purlin location per frame.

Interior Rafter

End Rafter

7. Align the plain end of the purlin with the center of the
end rafter and rotate the purlin pipe so that the first
mark is visible (near the clamp of the interior rafter).

10. Move to the interior rafter and align the mark on the

11. Verify that the rafter spacing is forty-eight inches (48")

12. Secure the cross connector to the rafter using a Tek

13. Repeat Steps 6-12 to install the first section of each

purlin with the center of the rafter to maintain the proper
spacing.

Interior Rafter

Purlin

Align mark with
center of rafter.

on-center (adjust as needed) and tighten the cross
connector.

screw. See Quick Start section if needed.

purlin assembly for the first two rafters.

Do not allow the
purlin to extend
beyond the end

rafter.

End rafter view

Interior rafter view

8. Tighten the end clamp and secure it to the rafter with a
Tek screw.

9. Install Tek screw through end clamp and into the purlin
pipe.

End Rafter

Dashed line
shows ground
level.

26' wide
center-to-center

14. Choose another interior rafter assembly and set it
in position. DO NOT USE THE REMAINING END
RAFTER.

15. Secure the rafter legs to the ground posts as previously
described and steady the rafter.

12

Purlin

16. Remove another section of purlin pipe from each pre­marked purlin assembly and attach these to the rafter.

17. Verify that the distance between the rafters is 48"
center-to-center. Adjust the rafter forward or backward

as needed to maintain this dimension.

Revision date: 06.07.18

FRAME ASSEMBLY (continued)

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

BASEBOARD INSTALLATION (RECOMMENDED)

18. Secure the purlin pipe joint with a Tek screw.

19. Repeat the above steps as needed to stand and secure
the remaining interior rafters and purlins to complete
the frame assembly.

20. Slide a band clamp onto each leg of the remaining
end rafter, secure the rafter to the ground posts, and
attach the purlins to it. Verify that the end clamps are
positioned with the nut and bolt to the inside of the
assembled frame. Refer to the Quick Start section and
previous diagrams if needed.

NOTE: If the last end rafter is plumb and the purlin
extends beyond the end of the rafter, cut the last
section of purlin pipe to the required length.

The baseboard (strongly recommended) is supplied by the
customer and is attached at ground level along both sides
of the frame. It helps keep the ground posts in place and
also prevents the frame from working into the ground when
anchored.

Attach the baseboards to the frame on the outside of the
ground posts at this time.

Gather the Parts

• Treated or recycled plastic lumber (supplied by
customer).

• 1/4" x 4" Carriage Bolts and 1/4" Nuts

NOTE: The following procedure describes one way to
install the recommended baseboards. The size and
type of the baseboard chosen may require the use of
alternative steps. When properly installed, baseboards
run the length of the frame.

On the outside of the frame, attach the first baseboard to
the ground posts using the 1/4" x 4" carriage bolts and
nuts. Continue adding baseboards to complete the first run.
Splices are made between posts as shown. Use a short
section of baseboard to secure separate baseboards at a
splice.

Dashed line shows
ground level.

Frame length may differ from actual frame.

21. 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 a Tek screw if
needed.

22. Remove any temporary bracing (if needed) and install
the baseboards and the side struts.

Inside of

Shelter

Outside of

Shelter

Ground
Level

NOTE: The boards should be at ground level or slightly
into grade to prevent the shelter from sinking and to
create a seal along the bottom. After installing the
baseboards, continue with these instructions.

If the recommended baseboard (customer-supplied) is not
used, secure the required diagonal struts to the ground
post using a Tek screw or other customer-supplied fastener.
The installation of the diagonal struts is described as
follows.

Revision date: 06.07.18

13

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

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 of the shelter.

Complete these steps to install the four (4) side struts:

3. Attach the remaining end of the strut to the baseboard
using a lag screw or nut and bolt (not included). See
the diagram that follows for location.

Photo shows the strut attached
to the inside of the customer­supplied baseboard.

End
Rafter

Gather the Parts

• Struts

• Band Clamps (#QH1402)

• Lag screw or nut and bolt (supplied by customer)

1. Locate one strut and position it between one end rafter
leg and the leg of the first interior rafter as shown
below.

Strut

End Rafter

Baseboard is required
for this procedure.

Interior
Rafter

Attach strut
as shown.

Baseboard

Ground Level

NOTE: A baseboard provides a place to attach each
strut and helps keep the ground posts at the required
depth. The customer is responsible for providing a
baseboard for this frame. If no baseboard is present,
attach the strut to the ground post using a Tek screw or
other customer supplied fasteners.

4. Repeat the above steps to attach the remaining side
struts to the shelter.

Customer supplies the
baseboard.

Ground Level

2. Attach one end of the strut to the band clamp as shown
in the diagram below.

End Rafter

Band Clamp

Strut

NOTE: Head of bolt on the band clamp must face the
toward the outside of the shelter.

5. After securing the struts, verify that all clamps are
secured with a Tek screw to the rafters.

6. Verify that each pipe splice (purlin and rafter) is
secured with a 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 1-800-245­9881 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.

14

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GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

END WALL INSTALLATION

The steps to install the end walls for the greenhouse
include the following:

1. Install end wall framing. (See the diagrams in the Quick
Start section at the back of these instructions. Read the
installing accessories note below.)

2. Prepare polycarbonate end panels and attach.

3. Assemble doors and attach.

INSTALL END WALL FRAMING (Front and Back)

• 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.

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.

MOVE ONLY THE VERTICAL SUPPORTS LABELED
AS NON-CRITICAL.

Before installing any greenhouse accessory, adhere to the
following:

• Consult the end frame diagrams before installing the
accessory horizontal framing.

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 THE END WALL FRAME

Refer to the end frame diagrams (Quick Start section).

The materials and parts needed to assemble the end wall
frame include:

• Square Tube (#102897)

• 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 metal tubing for the base tube of the
end wall. The base tube consists of 99" swaged tubes
and one (1) short section cut from a length of square
pipe. See Quick Start section for clarification.

2. Insert the swaged ends of the tubing into the plain ends
to connect the pieces, measure, and cut to length.

• Move only those verticals labeled as "NON-CRITICAL"
on the 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.

Revision date: 06.07.18

3. Position this assembled base tube on the ground
between the legs of the end rafter at the front of the
greenhouse and anchor it in place. This base tube will
be directly below and in line with the end rafter.

15

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

INSTALL THE END WALL FRAME (continued)

4. Secure the base tube between the legs of the end
rafter using an angle bracket and Tek screws.

The bracket
shown in this
diagram can
be installed
with either its
short section
(as shown) or

Ground
Post

Base Tube

the long section
attached to the
ground post.

9. Measure the distance between the top of the base tube

10. Choose one (1) square tube (#102897), insert the

11. On this assembled frame member, mark the length

and band clamp (Step 7) to determine the length of the
first vertical section of the door frame tube.

swaged end of the long tube into the plain end of
another tube and tap with a hammer to properly seat
the tubes at the joint.

determined in Step 9 (above) and subtract the amount

needed to account for the square-to-round tube
connect bracket, which is attached to the top of the

frame tube. See the diagram that follows.

End Rafter

5. On the base tube surface facing the inside of the
greenhouse, install a short Tek screw at each joint and
then locate and mark the center of the base tube.

6. Consult the End frame diagram (Quick Start section)
and mark the rough opening for the width of the double
door assembly.

7. Place the band clamps on the end rafter above the
door as shown below. DO NOT TIGHTEN THE BOLTS

AT THIS TIME.

ATTENTION: The frame shown below may differ from

the end wall frame. Consult the diagrams in the Quick
Start section to view the frame for this shelter.

8. Select the tubing for the two vertical frame supports for
the sides of the double door. Each support includes:

• One (1) long 99" section of square tubing (#102897

swaged end)

• One (1) short section of square tubing. This is cut

from a swaged end tube (#102897).

Front (or outside)
of the greenhouse

Square-to­Round Tube
Connect
Bracket

Vertical Door
Frame Tube

12. Select a square-to-round tube connect bracket and
attach the bracket to one end of the vertical frame
member. Use a 5/16" drill bit to drill a hole through the
tube and attach the bracket to the tube using a nut and
carriage bolt.

13. Repeat Steps 9-12 for the remaining vertical frame
member for the door.

14. With the square-to-round tube connect bracket
attached to the top of each vertical door frame tube,
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 assembly.

• One (1) square-to-round tube bracket (#104074)

16

Revision date: 06.07.18

INSTALL THE END WALL FRAME (continued)

15. Using the marks on the base tube for the rough
opening for the door, attach the bottom of each vertical
frame member to the base tube using an angle bracket.
Consult the end frame diagram.

Center of
Door Frame
Tube

Door Opening

Angle Bracket

Base Tube

Mark

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

17. Using a level (or other means), verify that one vertical
door frame tube is plumb and tighten the band clamp
bolt to lock the first door frame member in place.

18. Choose the square tube for the door frame header and
cut the swaged end to the proper length for the width of
the rough door opening.

19. Using two angle brackets, attach the header tube to
the end wall assembly between the vertical door frame
tubes as shown.

Header

16. With the vertical door frame tubes attached at the
bottom and loose at the top, measure each frame
member to locate the height of the rough door opening
and mark the location on the inside of the door frame.

Consult the End Frame Diagrams Quick Start section
located at the back of these instructions.

Mark Here

92-1/4"

Height of rough
door opening

92-1/4"

92-1/4"

Height of rough
door opening

96-3/4"

Width

Inside dimensions are shown. Diagrams may show a
different frame used for illustration purposes only.

20. Verify that both door frame verticals are plumb and
recheck the width of the rough door opening at the top
and bottom. Adjust if needed.

21. Cut the metal tube for the short, end wall supports
(positioned between the header and the end rafter) and
attach as shown in the following diagram.

Frame shown may differ from actual frame.

Revision date: 06.07.18

17

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

INSTALL THE END WALL FRAME (continued)

22. Use the end frame diagram to determine the number of
remaining vertical end frame supports and place one
band clamp on the end rafter for each of the remaining
vertical supports. Use the diagram for the location of
these clamps.

23. Using the end frame diagrams (Quick Start section),
measure and mark (on the base tube) the locations of
the remaining vertical end wall supports.

24. Choose the parts for each remaining vertical support
for the end wall framing. Each vertical support consists
of the following parts:

• Square tube: Longer verticals may require an

additional shorter length cut from a longer tube.

• One (1) square tube fitting (#104624) to attach the

support to the base tube of the end wall assembly.

• One (1) square-to-round tube connect bracket

(#104074) to attach the tubing to the band clamp
on the end rafter.

25. 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.

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.

27. With the square-to-round tube connect bracket

28. Align the center of the assembled frame member with

29. Verify that the vertical end wall frame member is plumb

30. Tighten the top band clamp and install a short Tek

attached to the top of the frame member, place a
square tube fitting on the bottom of the frame member.

the center mark on the base tube and attach the top of
the frame member to the band clamp on the rafter. Do
not tighten.

and use the short Tek screws to secure the square tube
fitting to the base tube.

Center Mark

screw through the clamp and into the rafter.

26. Choose a square-to-round tube connect bracket and
attach the bracket to one end of the vertical frame
member. Use a 5/16" drill bit to drill a hole through the
tube and attach the bracket to the tube using a nut and
carriage bolt.

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

Band Clamp

Square-to­Round Tube
Connect
Bracket

Front (or outside)
of the greenhouse

Inside view
of end rafter

31. Repeat the procedure as needed to assemble and
install the remaining vertical end wall supports.

32. Return to the bottom of each frame member and install
a short Tek screw through the backside of each tube
fitting to secure the end frame support to the tube
fitting.

33. Once each end wall is assembled, return to each band
clamp and pipe splice of each base tube and verify that
a Tek screw is installed. Install a Tek screw if needed.

18

Revision date: 06.07.18

INSTALL END WALL FRAMING (BACK)

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

TAPE SHARP EDGES AND CONNECTORS

The greenhouse end walls (front and back) are identical
except as noted below and on the end frame diagrams.

If the back wall includes the optional double door kit
(additional purchase required), repeat the End Wall
Installation procedure and install the framing for the
remaining end wall.

If the back wall does not include an optional double door
kit, consult the end frame diagram to install the vertical
frame members.

Dashed lines show where additional frame tubes are
installed when the optional double door is not used.

After the frame is assembled, check the frame for sharp
edges that could damage the cover or end panel, and file
these smooth or tape over them using the supplied duct
tape.

In addition, return to the rafters and apply tape over
each connector to better protect the cover film when it is
installed. The following photo shows one way to apply the
tape.

Duct tape
over connector

Consult the end frame diagram for additional information.

1. Read the note regarding the installation of optional
accessories at the beginning of the end wall installation
section.

2. Cut the tubes to the required length and attach to the
end wall framing.

3. Attach the frame supports at the top and bottom as
previous described.

Rafter and frame shown above may differ from actual
frame. Photo is used to illustrate how to apply tape.

Revision date: 06.07.18

19

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

EXCESS
TRIMMED AND
USED HERE

EXCESS

TRIMMED AND

USED HERE

END PANEL INSTALLATION

After the end wall framing is attached to the greenhouse,
attach the polycarbonate panels to the end wall framing.
The steps that follow describe one way to complete the end
wall panel installation.

ATTENTION: Panels must be position as shown on the
panel diagrams. Using a panel in the incorrect place can
affect the placement of subsequent panels. In addition, the
amount of aluminum profile used between panels and to
finish the panel edges may not be adequate if additional
seams are created. Begin at the door end of the building.

The materials and parts needed to assemble the 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 profile is used to finish the sides and top
edges of the polycarbonate panels.

• H-Channel profile is used to join two (2) separate
polycarbonate panels at the seam.

• Tek Screws and galvanized washers are used to
secure aluminum channel and panels to end wall
frame.

• Install the polycarbonate panels with the UV-protected
side to the outside. Mark this side with a marker if
needed after removing the protective film.

ATTENTION: The protective film must be removed
from the polycarbonate panels. Allowing the film to
remain intact and in direct sunlight will make the film
difficult if not impossible to remove.

• During preparation, rest the edges of the panels on
cardboard or other material to protect them from dirt
and damage.

NOTE: Install all accessories (fans, vents, heaters, etc.)
after installing all polycarbonate sheets.

Complete the following general steps to install the end wall
panels.

1. Consult the panel location diagrams, select one
polycarbonate panel, begin at the edge of the opening
for the double door, and work to the outside edge of the
end wall.

See the X in the diagram below for the first panel.

X

Dashed line and small arrows (above) show where to install white
vent tape.

NOTE: Remove the protective film. When needed, an
upper panel is cut to length after attaching it to the end
wall frame and rafter.

• Seal the bottom edge of the panels with white vent
tape.

• Consult the polycarbonate panels (Quick Start section)
for the location and lengths of each panel. The
diagrams are located at the back of these instructions.

20

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

END WALL FRAME TUBE

END WALL FRAME TUBE

END PANEL INSTALLATION (continued)

Always remove the protective film and mark and install the
UV-protected side to the outside of the greenhouse.

Secure all polycarbonat panels as shown in the diagrams
and photos below.

Mark UV Side

X

2. Apply white vent tape to the bottom of the lower panel
and then install the aluminum U-channel profile to the
edge of the panel adjacent to the door as shown on the
Polycarbonate Panels diagram.

3. Place the panel in position, attach it to the end wall
framing using Neo-bonded washers and the long Tek
screws.

Installed End Panels
with H-Channel

NOTE: When attaching any aluminum profile,
remember to account for the areas where different
sections of profile intersect so that the profile is cut to
the proper length.

Space the screws evenly at 16" when securing the
panels. DO NOT USE WASHERS WHEN SECURING
THE H-CHANNEL TO THE END WALL FRAMING.

The H-channel can be installed before the panel is
attached to the framing or after securing the panel to
the frame.

DO NOT install profile on the bottom of the end wall
panels. These edges are sealed with the white vent

tape.

H-Channel

Use a Tek screw and washer to secure panel to end wall
frame. Do not crush panel when installing screws.

TEK SCREW

PANEL SPLICE "H" CHANNEL

TEK SCREW & NEO-BONDED WASHER

8MM POLYCARBONATE

GLAZING PANEL

Diagram shows basic panel installation and fasteners used
to secure polycarbonte panels.

Revision date: 06.07.18

21

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

END PANEL INSTALLATION (continued)

Upper Panel

In this photo, the top of the panel is removed using a
power tool equipped with a round cutting bit. A utility
knife can also be used.

Cut upper panel
to proper length.

The greenhouse in this photo is used for illustration
only. It is of a different model.

5. After installing all panels, cut and attach the aluminum
profile to the remaining upper edge of all polycarbonate
panels.

NOTE: For the rounded edges of the panels, prepare
the U-channel profile as shown in the photos that
follow:

a. Cut angled notches from the aluminum profile to

allow bending of the profile. The tighter the curve,
the closer the notches.

b. The distance between the notches is determined

by the degree of the bend required to fit the rafter.

4. Continue installing the polycarbonate panels and
aluminum profile in the locations shown on the end
panel diagrams (Quick Start section) for the front and
back end walls.

ATTENTION: The U-channel profile for the top edge of
all panels (dashed line below) is installed last and after
all profile is installed along the edges and between
each panel as shown on the end panel diagrams.

Install profile here.

Frame shown above may differ from actual frame.

NOTE: The outside edges of the panels are finished
with the aluminum U-channel profile. Consult the
arrows above and the end panel diagrams at the back
of these instructions.

Aluminum U-channel profile is also installed at the
bottoms of the panels above the doors to finish those
edges.

c. Bend the U-channel profile at the notches before

installing it.

6. Repeat the procedure for the remaining end panels for
the other end of the greenhouse.

7. Continue with the Double Door Assembly procedures
that follow.

22

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

DOUBLE DOOR ASSEMBLY

The materials and parts needed to assemble the doors
include:

• Door frames and polycarbonate panels

• Door hinges and latch hardware

• Aluminum U-Channel profile (#104213)

• End cap profile (#104548)

• Tek screws (#FA4482B & FA4484B))

• Neo-bonded galvanized washers (#102921B)

ASSEMBLE AND ATTACH THE DOORS

NOTE: Install the polycarbonate panels with the

UV-protected side to the outside.

1. Locate door frame (102923), assemble (if needed), and
place on a flat surface.

2. Select one polycarbonate panel (this will be one 4' x 8'
panel) and trim it so that the length is one-quarter inch
(1/4") shorter than the length of the door frame.

3. Trim width of panel (if needed) so that it is one-quarter
inch (1/4") narrower than width of door frame.

NOTE: Trimming the panels as instructed will keep the
panel flush with the edge of the door frame after the
aluminum profile is installed.

4. Center the panel on the door frame.

5. Using the long Tek screws and neo-bonded galvanized
washers to attach the panel to the horizontal cross tube
of the door frame.

6. Install aluminum U-Channel profile to all edges of the
polycarbonate panel.

Photo shows the polycarbonate panel installed on
the outside of the door frame and finished with the
aluminum U-Channel profile. Corners are cut at 45°
angles.

To keep the panel and profile in place, the long Tek
screws and neo-bonded galvanized washers are
installed so the screw drills through the longer edge of
the U-profile (underside of the polycarbonate panel)
and the washer overlaps the shorter edge of the
U-profile (top) as shown above.

7. Repeat the above steps to attach the polycarbonate
panel and to install the aluminum profile to the
remaining door frame.

8. After assembling both doors, evenly space the hinges
along the door frame of each door and attach the
hinges to the assembled doors using the short Tek
screws.

NOTE: Attach the panel in the locations shown in the
photo to hold the panel in place while installing the
aluminum profile to the perimeter of the panel.

Revision date: 06.07.18

23

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

DOUBLE DOOR ASSEMBLY (continued)

9. With the hinges attached to the doors, use the short
Tek screws to attach the doors to the frame of the end
wall.

a. Photo shows the end cap as attached to the door

frame tube. View shows the assembly from the
outside.

b. Cross section shows the end cap (dashed line)

attached to the inside/back of the door frame.

Locations of door hinges may vary.

10. Install the 6" chain bolt to the upper part of the inside
of one door and the main latch assembly to the other
door.

Door Frame
Tube

End Cap
(#104548)

c. Dashed line identifies where to attach the end cap

profile. The end cap extends beyond the frame
members and into the rough opening to stop the
door in the frame and to help seal the gap between
the door and frame.

Inside
View

Outside
View

11. At the top and sides of the end wall door opening on
the inside of the frame, attach end cap and allow it to
extend below and into the door frame opening.

ATTENTION: This profile acts as a stop for the double
doors, which prevents undo stress on the hinges.
Consult the photos that follow.

24

End cap used for

door stop and seal.

Diagram may show a different frame used for illustration
purposes only.

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

DOUBLE DOOR ASSEMBLY (continued)

12. After end cap profile is installed, install another section
of the same end cap on the inside frame of the door

that includes the chain latch.

INSTALL POLYLATCH U-CHANNEL (102197)

Gather parts:

• Aluminum U-channel (#102197)

• Ribbon board and wood screws (supplied by customer)

• Tek screws (#FA4482B)

1. Measure height (48" maximum) to identify top of roll-up
sides.

NOTE: Attach polylatch channel at approximately 48"
above the ground along both sides of frame. Attaching
a ribbon board (not included) to rafters and then
attaching u-channel to ribbon board is recommended.

Use customer-supplied wood screws to secure
u-channel to wood ribbon board if board is used.

Consult diagram below for clarification.

Diagram may show a different frame used for illustration
purposes only.

NOTE: This length of end cap will act as a stop for the
remaining door of the double door assembly when both
doors are closed.

13. Check the operation of the latches and the doors.

14. Continue with the Main Cover Installation procedure
that follows.

MAIN COVER INSTALLATION

After the end panels and doors are installed, install the
main covers. The steps to install the cover include:

1. Attach poly latch U-Channel along the greenhouse
sides and tops of the greenhouse end rafters.

2. Pull one cover film over the frame and attach to the end
rafters.

3. Stretch and attach the first cover to the sides.

Ribbon Board

48"

Rafter

NOTE: Ribbon board and baseboard (recommended)
shown above are supplied by the customer.

2. Attach one section of u-channel to the rafters along the

frame side using Tek screws. Attach u-channel ush

with outside edge of end wall panels. Ribbon board is
shown below.

U-Channel

4. Install the Inflation Fan kit.

5. Attach a second cover layer to the frame.

6. Test the operation of the Inflation fan kit.

7. Install roll-up side kits and test.

Revision date: 06.07.18

Ribbon Board

NOTE: Single polylatch (102197) is attached to building
sides and tops of end rafters.

25

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

INSTALL POLY LATCH U-CHANNEL (continued)

3. Continue to attach u-channel to rafters (or ribbon board
if used) and work toward the other end of frame. Cut
last section of u-channel to required length so it is flush
with end wall panel.

4. Repeat these steps for remaining side.

5. After attaching u-channel to frame sides, use Tek
screws to attach the 102197 u-channel to top edge of
the end rafters.

Top edge of the end rafter

The steps that follow describe one way to complete this
process.

ATTENTION: Install the IR film cover first! Examine the
IR film and install with the correct side facing in the
direction indicated on the film.

1. Take the cover film and position it along the base of
one side of the greenhouse.

Location of the side runs of U-channel and ribbon board.

NOTE: Insert shows installation of u-channel on top
of an end rafter. U-channel will bend with the curve of
rafter as it is attached. Install screws at 12" on-center.

6. Continue to attach u-channel until it is installed on top
of both end rafters.

INSTALL MAIN COVER

Gather the parts:

• Main covers and inflation fan kit

• U-Channel spring (#102198)

• Ropes long enough to reach over the frame (provided
by customer)

• Box cutter or utility knife

Assembly Procedure

After the poly latch U-channel is attached to the frame,
unpack the main cover and pull into place. Ropes or straps
are typically used to pull the main cover onto and over the
frame.

WARNING: To prevent damage to the cover and to
prevent serious personal injury, DO NOT attempt to
install the main cover on windy or stormy days.

Consult the Spec Sheets for cover identification. The
greenhouse is equipped with double-layer main cover and
an inflation fan kit. One cover is pulled into position and
anchored to the frame, then the inflation kit is installed, and
finally the last main cover is attached.

NOTE: Unfold the cover and locate the leading edge
The frame shown in the photos that follow differs from
actual frame. Procedure is the same.

Photo shows the cover film in position to pull over the
greenhouse.

2. Along the edge, make small holes in the cover at
evenly spaced intervals and tie rope or straps to the
cover.

NOTE: The ropes or straps must be long enough to
reach over the top of the building to the other side.
Long buildings require additional ropes to prevent
tearing the main cover when it is pulled into place.

Keep the holes, used to attach the rope or straps, near
the edge of the material and below where the cover will
be secured to the U-channel.

26

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

INSTALL MAIN COVER (continued)

3. After tying the ropes to the main cover, throw the ropes
over the top of the greenhouse and pull the covers into
place.

Use ropes to pull cover over the greenhouse and onto
the frame. ADDITIONAL ASSISTANCE IS REQUIRED

4. Center cover side-to-side and end-to-end.

IMPORTANT: To prevent damage to the main cover
during installation, additional personnel and lifts may
be needed. Verify that you have installed the IR film

according to the markings shown on the film.

5. Once the main cover is in place and centered, begin at
the peak of one end and install the wire spring into the
U-channel to secure the cover.

The rope can remain in place to temporarily secure the
cover. Remove the ropes as the covers are secured to
the greenhouse.

6. As the spring is install the spring into the U-channel
at the top of the first end rafter, ensure that an even
amount of the cover is exposed and maintained along
the edge of the greenhouse.

NOTE: The cover material is cut longer/wider than
is required to cover the greenhouse. For easier
anchoring, allow approximately 10" to extend past the
edge of the end rafter as the cover is anchored into
place.

7. Continue down both edges of the first end rafter until
the entire length of the end of the main cover film is
secured in place.

8. Move to the other end of the building and repeat the
steps to secure the main cover in the U-channel.

9. After the cover is stretched end-to-end and secured
using the spring and U-channel, move to one side of
the greenhouse and repeat the steps to anchor the
cover film to the first side.

NOTE: Begin at one end of the U-channel and work
toward the other. Another option is to begin at the
middle of each side and work towards each end.
Maintain an even length as working along the side. The
final stretching of the cover will take place when the
last side is secured.

Photos show installing the spring into the U-channel
on the outside of the greenhouse. The process is the
same for the U-channel attached to the top of the end
rafters.

ATTENTION: Center the main cover front to back and
side-to-side to ensure that enough cover material is
present to lock into the U-channel. The excess cover
along each side is rolled up when the roll-up side
assemblies are installed.

Revision date: 06.07.18

Attach main cover to Poly Latch U-Channel.

10. After securing the first side, move to the remaining
side, stretch the cover, and secure it in place.

NOTE: Pull the cover tight as the spring is inserted into
the U-channel.

27

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

INSTALL MAIN COVER (continued)

11. Once the first cover is stretched and secure, install the
inflation fan kit in the desired location and according to
the instructions sent with the kit.

Install the Inflation Fan Kit before installing the second
main cover. Consult the instructions included with the
Inflation Fan Kit to install the kit.

12. After installing the inflation fan kit, repeat the steps to
install the film for the second main cover.

NOTE: When installing the second cover film, use the
same U-channel used for the first cover film, and a
second run of spring, which is installed on top of the
first U-channel spring already in the channel.

The excess material along the sides is rolled up in the
roll-up side assembly.

13. With the second cover film layer installed, test the
operation of the inflation fan kit.

IMPORTANT: If trimming the excess cover material at
the ends (not the sides), DO NOT remove too much of
the excess material.

Some excess main cover material (the material that
extends beyond the end rafters) should remain in place
to more easily re-stretch the film if needed.

ASSEMBLE THE ROLL-UP SIDE CONDUIT

Gather the Parts:

• Pipe 1.315'' x 75'' swaged 17 GA (#131S0075)

• Pipe 1.315'' x XX'' plain 17 GA (#131P0XX)

• Tek screws (#FA4482B)

The roll-up side conduit assembly is attached to the bottom
of the roll-up side cover material. This assembly runs the
length of the frame and serves as the center pipe that the
roll-up cover wraps around when it is opened to ventilate
the shelter. This conduit is identical to the purlins that were

assembled and attached to the frame.

NOTE: The number of pipes used in the roll-up conduit
assembly varies with the length of the greenhouse.

Roll-up conduit assemblies consist of multiple sections of
swaged 1.315" pipe at 75" in length (part #131S075) and
one (1) additional plain 1.315" pipe at a shorter length
(part #131P0XX) determined by the greenhouse, where
XX represents the remaining length required to complete
the roll-up conduit assembly and to reach the end of the
greenhouse.

Complete these steps to assemble the roll-up side conduit.

1. Locate all sections of pipe needed to assemble the

2. Insert the swaged end of each pipe into the plain end of

3. Secure each pipe joint with a Tek screw.

cover conduit.

another pipe until the conduit is assembled.

14. Continue with the Install the Roll-up Side Assemblies
procedure.

INSTALL THE ROLL-UP SIDE ASSEMBLIES

The instructions below describe how to install a single
roll-up sidewall assembly for one side of the frame. The
procedure is repeated for the remaining side.

The procedures to install the roll-up side include the
following:

1. Assemble the roll-up side conduit.

2. Attach the roll-up conduit to the bottom of the main
cover along the sides.

3. Assemble the Twist-of-the-Wrist assembly and attach it
to the frame and the roll-up side.

4. Install the Anti-Billow Rope system.

5. Test the operation of the roll-up side.

28

4. Place the assembled conduit at the base of the side
where the end of the main cover is located.

NOTE: Apply duct tape over Tek screws to prevent
damage to main cover.

5. Repeat the steps to assemble the remaining cover
conduit.

6. Continue with the procedure that follows to attach the
conduit to the main cover.

Revision date: 06.07.18

ATTACH CONDUIT TO MAIN COVER ROLL-UP SIDE

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

TWIST-OF-THE-WRIST ASSEMBLY

Gather the parts:

• Assembled conduits

• Fabric clips #CC6212 (Divide quantity in half.)

• Tek screws (#FA4482B)

To this point, the main cover layers are secured to the
greenhouse and the roll-up portion of the main covers
along both sides are secured to and hanging down from the
poly latch U-channel.

1. Unfold the remaining portion of the main cover (if
needed) and evenly stretch it out on the ground along
the frame.

2. Working from the inside the frame, roll the assembled
cover conduit onto the edge of the main cover.

3. Verify that the cover and conduit are evenly positioned
and tuck the cover edge under the conduit and begin to
turn the conduit in a clockwise direction.

Inside View

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.

Threaded Rod

Purlin

Guide
Channel

Frame shown

End
Rafter

may differ from
actual frame.

Diagram may show a different model and is used for
illustration purposes only.

NOTE: If the conduit begins to turn inside the cover
material and is unable to roll up the side evenly, secure
the cover material to the conduit with Tek screws and
fabric clips evenly spaced along the conduit.

4. Continue to roll the conduit until the excess cover
material is wound around the conduit.

5. Repeat these steps for the other side of the shelter.

6. With the excess cover material rolled up on the conduit
assemblies, continue with the Twist-of-the-Wrist
Assembly procedure.

Carriage
Bolt

Roll-up Side
Conduit

1. Drill a 5/16" hole through the 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.

Revision date: 06.07.18

29

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

TWIST-OF-THE-WRIST ASSEMBLY (continued)

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"

6. Select the bearing bracket and attach the bearings as

7. Install the longer bolts with bearings on the side of the

8. For the spacers on the long bolts, insert a 5/16" nut

needed. (In some instances, the bearings may come
already attached.) Assemble as follows:

NOTE: 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.

bracket that has the two holes. Install these before
installing the double bearing assembles. See the
figures below.

over each bolt. These nuts are used as spacers only.

5/16" Nut

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.

Top View

NOTE: Install a flat washer between the nut and the
end panel.

5/16" Nut

9. Slide the Twist-of-the-Wrist mounting plate over the
long bolts and secure the plate with two lock nuts.

Lock Nuts

10. Attach the Twist-of-the-Wrist gearbox to the mounting
plate using hex head bolts.

30

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

TWIST-OF-THE-WRIST ASSEMBLY (CONTINUED)

11. Using a carriage bolt, attach the square shaft to a
tubing adapter.

12. Slide the square shaft through the Twist-of-the-Wrist
gearbox.

15. Attach the rolled conduit to the square shaft of the
assembly by inserting a carriage bolt through the hole
in the conduit and tubing adapter. Tighten the nut.

16. Attach the crank handle to the Twist-of-the-Wrist
assembly. (End panel is not shown in the above
diagram.)

17. Test the operation of the Twist-of-the-Wrist assembly
and repeat the steps for the remaining assembly.

NOTE: If the cover rolls in the desired direction, but
you want to turn the crank in the opposite direction for
the same result, unbolt, reposition the gearbox, and
remount it on the same side of the mounting bracket.

13. Slide the Twist-of-the-Wrist assembly onto the
aluminum channel from the ground end. (This is the
free end of the channel.)

14. Finish rolling the cover conduit in a clockwise motion
up to the Twist-of-the-Wrist assembly.

INSTALL ANTI-BILLOW ROPES

Gather the Parts:

• Eye screws and eye bolts

• Anti-Billow rope

• Nut and washers

Anti-billow ropes secure the roll-up sides when they are in
the down position. Complete the following steps to install
the ropes. Repeat the steps for the remaining side.

ATTENTION: The procedure that follows is applicable
when the frame was constructed using wood boards under
each rafter foot, or if baseboards were installed. If the
shelter was constructed on concrete footings, a concrete
slab, or on bare ground, alternative steps must be taken
by the owner during the following procedure to anchor the
lower ends of the anti-billow ropes. Additional parts may be

required and must be supplied by the customer.

1. Using the Twist-of-the-Wrist assembly, roll up the
sidewall so that it is a few inches above the ground.

2. Install the first eye screw into the wood baseboard at
the base of the end rafter where the Twist-of-the-Wrist
assembly is located. See diagram on the next page.

Revision date: 06.07.18

31

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

INSTALL ANTI-BILLOW ROPES (CONTINUED)

ATTENTION: If no wood baseboard is present as

required, additional steps must be take to anchor
the lower portion of the anti-billow ropes. (Contact
Customer Service at 1-800-245-9881 to purchase
additional parts if needed.)

3. Move up the same end rafter and drill a 3/8" hole
through the poly latch U-Channel and rafter leg, insert
an eyebolt through the hole, and secure the eyebolt
with a nut and washer.

8. Repeat the steps to install another section of anti-billow

9. Check the roll-up side operation.

10. Read the shelter care and maintenance information

SHELTER CARE AND MAINTENANCE

Proper care and maintenance of the shelter is important.
Check the following items periodically to properly maintain
the shelter:

• Regularly check the cover or covers to see that these

• Check connections and all fasteners to verify that they

rope. Continue this pattern until all ropes are tied along
one side and repeat the steps to install the anti-billow
ropes for the remaining side.

NOTE: The number of individual ropes along any
one side depends on the length of the building, rafter
spacing, and the length of the rope sections.

that follows.

are tight and in proper repair. Tighten and adjust the
tension as needed to prevent damage and wear.

remain tight and in good condition.

Diagram may show a different frame used for illustration
purposes only.

NOTE: If the poly latch U-Channel was attached to
a ribbon board (as suggested), the eyebolt can be
mounted through the poly latch channel and ribbon
board.

4. Attach the remaining eye screws and eyebolts using
the diagram below as a pattern guide.

5. Once all eyebolts/eye screws are installed in the proper
locations, install the anti-billow rope in short lengths
along each side. Thread the free end of the rope
through the end rafter eyebolts and the eyebolts at two
to three interior rafters.

Rope

#1

Rope

#2

Rope

#3

• Check the polycarbonate panels (if equipped) to verify
that these are secure and in good repair. Verify that
nothing is touching the panels that may cause damage.

• Do not climb or stand on the greenhouse at anytime.

• Remove debris and objects that can accumulate on the
greenhouse. Use tools that will not damage the cover
when removing debris.

• Remove snow to prevent excess accumulation. Use
tools that will not damage the cover when removing
snow.

• Check the contents of the shelter to verify that nothing
is touching the cover that could cause damage.

• If the shelter is dismantled and moved, inspect all parts
and connections before using.

• Depending on the contents, construction of the shelter,
shelter materials, and shelter location, the potential for
condensation exists. GrowSpan™ offers several items
that can be used to alleviate a condensation condition.
Please contact a GrowSpan™ representative for
additional information.

Example: Circles identify the ends of Rope #1.

6. Cut the rope and tie one end to the eyebolt/eye screw.

7. Pull the rope tight and tie the remaining end to secure.

32

• For replacement or missing parts, call 1-800-245-9881
for assistance.

Revision date: 06.07.18

Page reserved for customer notes.

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

Revision date: 06.07.18

33

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

QUICK START GUIDE

26' Gothic Pro Greenhouse

34

Frame shown may differ in length from actual frame.

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

FRONT PROFILE

Revision date: 06.07.18

35

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

SIDE PROFILE - 106306

Baseboards

Supplied by

Customer

28'-0"

Shelter Length

4'-0" Rafter Spacing

131S075 131S075 131S075 131S075 131P0495

4 Runs of Pipe Assembly

Used for Purlin runs

36

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

131P0735

131S075

SIDE PROFILE - 106307

Revision date: 06.07.18

Baseboards

Supplied by

Customer

36'-0"

Shelter Length

4'-0" Rafter Spacing

131S075 131S075 131S075 131S075

4 Runs of Pipe Assembly

Used for Purlin runs

37

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

131P0735

SIDE PROFILE - 106308

131S075 131S075 131S075

48'-0"

Shelter Length

4'-0" Rafter Spacing

38

Baseboards

Supplied by

Customer

131S075 131S075 131S075 131S075

4 Runs of Pipe Assembly

Used for Purlin runs

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

Used for Purlin runs

131P0735

SIDE PROFILE - 106309

Revision date: 06.07.18

Baseboards

Supplied by

Customer

131S075131S075 131S075 131S075 131S075 131S075 131S075

72'-0"

Shelter Length

4'-0" Rafter Spacing

131S075 131S075131S075 131S075

4 Runs of Pipe Assembly

39

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

40

CONNECTIONS

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

CONNECTION - FRAME DETAILS

Revision date: 06.07.18

41

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

48"

25 1/8"

FROM 1 1/2" X 1 1/2" SQUARE TUBING.

ATTENTION: Use only the 102897 square

tubing to assemble the end wall frame.

L

C

-

48"

L

C

L

C

­L

C

22 7/8"

VIEW 2

VIEW 1

L

C

­L

C

L

C

­L

C

VIEW 3

92 1/4"

INSIDE DIM

END FRAME DIAGRAM - FRONT VIEW

L

C

­L

C

98 1/4"

L

C

­L

C

22 7/8"

L

C

-

48"

L

C

NOTE: COLUMNS NOT DIMENIONED HAVE A NON-CRITICAL PLACEMENT

AND ARE USED FOR POLYCARBONATE SUPPORT.

ALL END FRAMING TUBES ARE FULL LENGTH OR CUT

42

Revision date: 06.07.18

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

CONNECTION - END WALL DETAILS

Revision date: 06.07.18

43

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

ATTENTION: Use only the 102897 square

tubing to assemble the end wall frame.

L

C

-

48"

L

C

L

C

­L

C

22 7/8"

L

C

­L

C

25 1/8"

L

C

­L

C

47 15/16"

L

C

­L

C

25 1/8"

L

C

­L

C

22 7/8"

L

C

-

48"

L

END FRAME DIAGRAM - BACK VIEW

C

NOTE: COLUMNS NOT DIMENIONED HAVE A NON-CRITICAL PLACEMENT

AND ARE USED FOR POLYCARBONATE SUPPORT.

ALL END FRAMING TUBES ARE FULL LENGTH OR CUT

FROM 1 1/2" X 1 1/2" SQUARE TUBING.

44

Revision date: 06.07.18

Flat

Side

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

Center Groove

Install 1-1/2" Tek screws through

H-channel into building frame.

H-Channel

Flat side toward the sun.

Channel

toward sun.

UV-protected side

H-CHANNEL INSTALLATION INSTRUCTIONS

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

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.

Revision date: 06.07.18

H-channel.

ATTENTION: Install all twin-wall polycarbonate panels with UV-protected side toward the sun.

45

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

4' X 10'

4' X 8'

ONE

HALF

4' X 8'

POLY

EXCESS

USED HERE

TRIMMED AND

POLY

POLY

4' X 8'

POLY

4' X 8'

POLY

4' X 8'

EXCESS

USED HERE

TRIMMED AND

POLY

POLYCARBONATE PANELS - FRONT VIEW

ONE

HALF

POLY

4' X 8'

4' X 8'

POLY

4' X 8'

4' X 8'

POLY

POLY

H-CHANNEL

U-CHANNEL

NOTE: INSTALL UV-PROTECTED SIDE OF PANEL TO THE OUTSIDE.

46

4' X 10'

POLY

Revision date: 06.07.18

EXCESS

USED HERE

TRIMMED AND

GROWSPAN™ GOTHIC PRO GREENHOUSES AND SYSTEMS

4' X 10'

POLY

4' X 8'

POLY

4' X 8'

POLY

4' X 8'

POLY

4' X 8'

POLY

4' X 8'

EXCESS

USED HERE

TRIMMED AND

POLY

POLYCARBONATE PANELS - BACK VIEW

4' X 8'

POLY

4' X 8'

POLY

4' X 8'

POLY

4' X 10'

POLY

H-CHANNEL

NOTE: INSTALL UV-PROTECTED SIDE OF PANEL TO THE OUTSIDE.

Revision date: 06.07.18

47