Every Calhoun structure is supported with over two decades of engineering excellence and attention to detail.

Our buildings offer a beautiful, functional and bright solution to any structure need, backed by years of engineering excellence. You can rest easy knowing Calhoun engineers have laboured over every detail to design a better structure that lasts longer.

We pioneered a fabric structure production process that includes hot dip galvanizing every truss post welding, the option of corrosion resistant Super Shield coating and the flexibility of free span interior. We utilize a 3D Finite Element Non-Linear Analysis while designing every building, so we can give detailed points of pressure or stresses on each specific area of your building.

We are confident that our superior engineering results in stronger, longer lasting buildings. All fabric structures come with an engineer’s stamp but they are not all the same. We encourage you to investigate the Calhoun difference.

Calhoun offers you a warranty you can trust.

Choose your building series

CC Series

Built to Adapt

Widths: 32′, 42′, 52′ & 62′

Our Compression Coupler structure combines a coupler and gusset to allow for a longer transfer of pressure over the connecting cords. This design allows us to achieve greater design capacity over the competitor’s flat plate gusset design that transfers pressure to the end of the tube only.

CC Series Building Drawing


• Hot Dip Galvanized (HDG)
Steel Frame
• HDG Hardware
• 12 oz High Density polyethylene
• One piece Cover (2 covers will be
used on buildings over 100’ long)


• Engineered Wood post foundation
• Steel Legs with different height
options 2’,4’,6’,8’ & 10’
• 2-5’ Eave Bunker Covers
• Roof Vent Support Systems
• Individual Keder panel system in lieu
of one piece cover
• PVC cover
• Super Shield rubberized coating


• Wood posts
• I-Beam
• Concrete pier
• Pre cast Blocks & walls
• Concrete walls
• Helical anchors
• Sea Containers

HT Series

Reach Greater

Widths: 50′, 60′, 65′, 72′ & 82′

Our High Top series uses the same unique compression couple design as the CC Series, but uses larger top and bottom cords and a deeper truss depth. The HT Series comes standard with our individual Keder Panel System.

Ideal for customers looking for extra interior height. The extra height and free span space makes unloading large trucks easy and worry free. The HT design also makes it a “tank” in heavy snow load areas.

HT Series Building


• Hot Dip Galvanized (HDG)
Steel Frame
• HDG Hardware
• 12 oz High Density polyethylene (HDPE)
• Individual Keder Panel System


• Steel Legs with different height
options 2’,4’,6’,8’ & 10’
• 2-5’ Eave Bunker Covers
• Roof Vent Support Systems
• PVC cover
• Super Shield rubberized coating


• I-Beam
• Concrete pier
• Pre cast Blocks & walls
• Concrete walls
• Helical anchors
• Sea Containers

VP Series

Built to
Suit Your Needs

Widths: from 30′ to 200′

The Versatile Product design allows us to interchange the different series of trusses to create any size of building for any type of application, anywhere in the world. Its distinctive, traditional look with 24′ eaves finished in wood or steel, will leave you wondering if it is even a fabric building. Our rounded shoulder design finished in fabric offers a more practical and economical alternative for the VP Series.

VP Series Building

VP Series Eave


• Hot Dip Galvanized (HDG) Steel Frame
• HDG Hardware
• 12 oz High Density polyethylene
• Individual Keder Panel System


• Steel Legs with different height options 8′ & 14′
• 2-5′ Eave bunker covers
• Roof Vent Support Systems
• PVC cover
• Super Shield rubberized coating


• I-Beam
• Concrete pier
• Pre cast Blocks & walls
• Concrete walls
• Helical anchors
• Sea Containers

CL Series

Easily Deployable
and Portable

Widths: 32′, 36′, 40′ & 50′

The Container Line Building Series is the first-ever fabric building in the industry that has been designed and engineered exclusively for container-use only. The CL Building Series is engineered site-specific to suit any location in North America, and can be used as either a temporary or permanent solution.

CL Series Building


• Hot Dip Galvanized (HDG)
Steel Frame
• HDG Hardware
• 12 oz High Density polyethylene
• Bag Cover


• Roof vent support system
• PVC Cover
• Larger door openings
• Individual Keder Panel System


• Standard 8’6” tall Container
• High Boy 9’-6” tall Containers
• Multiple Containers

Superior Engineering Icon

superior engineering

Calhoun Super Structure uses cutting edge technology when it comes to engineering your fabric tension building to your exact site loads, use and application. Being one of the only names in the industry to utilize 3D Finite Element Nonlinear Analysis, we can give detailed points of pressure or stresses on each specific area of your building. Knowing that each building, location and application is unique, we use only the most precise and premier technology currently available. Our team of highly trained Engineers, Designers and Detailers are what sets Calhoun Super Structure apart from the competition. They have made it their personal mission to ensure that your building is engineered to be the strongest, most reliable structure on the market.

The Engineering Details

The engineering status quo in the industry involves a linear elastic portal frame analysis wherein the load is only approximated. When our competitors implement this type of analysis during the engineering phase, they are simply using assumptions. This ‘best guess’ approach means that the amount of force applied to each point of the structure cannot be accurately predicted and could prove disastrous, leading to catastrophic failures of the structure.

Calhoun is always one step ahead of its competitors. We go the extra mile to ensure that every structure installed is engineered to the highest possible standards, leaving our customers with a safe and reliable building.

Calhoun’s 3D Finite Element Nonlinear Analysis process completed for each project makes our structures not only safe, strong, and reliable, but also environmentally sustainable and economical. With over two decades spent perfecting this engineering, Calhoun buildings far exceed the status quo in the industry. It’s all in the details – and we’ve got you covered.

Super Shield Icon

super shield

We offer an extra layer of protection for your structure when you are storing corrosive materials, like fertilizer or salt. Super Shield is our rubberized spray coating, designed to add an extra layer on top of the hot dip galvanized structure to provide superior protection.

Super Shield lengthens the life expectancy of your hot dip galvanized trusses and base plates by guarding against deterioration and corrosion. The rubberized spray coating can be applied to your concrete and block wall foundation to create a moisture barrier protection layer, and to seal cracks.

Features and Benefits

Elastic-All Rubber
Filler-free and highly elastic to bridge cracks and move with expansion and contraction.

Over 1,000 psi tensile strength.

Formulated with UV and weather-resisting rubber to provide long service life.

Spray applied as a monolithic membrane with no leaky seams.

Chemical Resistance
Resistant to most water-borne chemicals including most concentrated acids and bases, such as fertilizer chemicals.

Certified Application
Applied only by manufacturer and certified applicators.

Providing the most cost-effective waterproofing protective coating for your structure.

Environmentally Friendly
Non-toxic, non-carcinogenic, entirely asphalt-free.

Hot Dip Galvanized Icon

Hot Dip Galvanization

The Hot Dip galvanizing process means that Calhoun structures last longer. Studies show that next to stainless steel, hot dip galvanizing (HDG) is the best protection against rust and weathering. The hot dip galvanizing process makes our trusses strong and more reliable, while creating a smooth surface that won’t snag or tear the cover.

Here’s how it works.

Degreasing > Rinsing > Pickling > Rinsing > Flux Solution > Drying > Zinc Bath > Cooling & Inspection

Every Calhoun Super Structure is galvanized according to long-established, well accepted and approved standards of ASTM, the Canadian Standards Association (CSA), and the American Association of State Highway and Transportation Officials (AASHTO). These standards cover everything from minimum required coating thickness for various categories of galvanized items to the composition of the zinc metal used in the process.

This is a First Maintenance Chart compiled from real life data for Hot Dip Galvanized Coatings based on Zinc thickness.

First Maintenance Chart

This chart is the result of an eight year test done in highly corrosive swine manure.

Eight year test done in highly corrosive swine manure chart.

Zinc coating mill thickness in Hot Dip Galvanizing compared to In-line Galvanizing

• Galvanization completed before fabrication.
• 0.9mm of zinc
• Interior weld locations are exposed leaving raw steel with no corrosion protection.
• 300-500psi after metallurgical bond

Hot Dip Galvanized (HDG)
• Galvanization completed after fabrication.
• 3.9mm of zinc
• Coats all surfaces including both the unseen
inside surfaces and the outside surfaces.
• 3600psi after metallurgical bond

In-Line Galvanized steel is NOT galvanized on the inside.
The tube is coated on the inside with a thin layer of Inorganic Zinc-Rich Paint.
The Chart Below shows a comparison.

Hot Dip Galvanized Steel
More than 100 years
More than 90 years
More than 70 years
More than 50 years

Exceeds ASTM A 123 minimum (.3.9 mils for 1/4” thick steel)

Exterior & Interior thickness greater or equal to flat surfaces.

Service life and Durability

Coating Thickness

Coating Coverage Consistency

Inorganic Zinc-Rich Paint (ZRP)
27 years
17 years
12 years
12 years

Variable – May not meet required minimum due to applicator skill

Exterior surfaces only
Edge and Corner thickness less than flat surfaces

Asked Questions


How long does it take to order and install my building?

Calhoun Super Structures can be ordered and installed much quicker than your traditional wood or steel building. Order and installation times can vary based on the scope of the work needed to be done, size and customization. Your local Calhoun Super Structure dealer can give you a more precise idea on the amount of time your building will take based on your specific structure.


What is an individual Keder panel system?

An individual Keder panel system is a custom made aluminum extrusion, mounted at each truss section on the top side of the top cord. Fabric panels are made to the exact bay spacing with a 1/2″ industrial rope continuously heat welded in place at the sides. The fabric Keder panel is then pulled through the aluminum extrusion and tensioned at both ends. Purlins and cables are then added, securing the structure and giving the fabric Keder panel its ultimate tension laterally. A leak-proof vinyl cap is then added to the aluminum extrusion for sealing. This system does not allow the fabric to touch the structures frame. This helps to create a quieter, more secure environment with no risk of wear points on the cover, adding years of life to your structure. This system is standard on all buildings over 60′ wide.


Can I expand my building?

Yes. Expanding your existing Calhoun Super Structures is easy. Our buildings are designed for quick and easy expansion.


 What type of warranty comes with my building?

Calhoun Super Structures offer a 15 year warranty on every structure. Contact your local dealer for more information.


 What makes Calhoun Super Structure a leader in the fabric building industry?

At this point in time, Calhoun Super Structure is one of the only companies out there that engineers every single building sold using the exact site conditions through 3D Finite element nonlinear analysis. That means we can tell you the exact level of stress the structure is under to the size of a pin head anywhere on the structure. Our specific engineering process is just one of many reasons that have allowed Calhoun to continue as a leader in the fabric building industry. Check out the Calhoun difference here.


What preparations do I need to do before building my Calhoun Super Structure?

The first thing we always recommend is to consult with your local building official on the rules and restrictions regarding your building permit. Knowing what is and isn’t allowed for your area beforehand can save you time and effort later on. Let one of our local dealers assist you throughout the process, from concept to completion.

Why Choose a Fabric Building?
  1. Over time, steel-clad buildings corrode, weaken and become ugly, even unsafe.
  2. Steel is highly conductive, absorbs and retains heat in the summer and cold in the winter.
  3. Steel buildings have exterior drill and nail holes that leak moisture, they are vulnerable to rust and corrosion, which cannot be repaired.
  4. Steel and wood buildings are dark; they have limited options for natural light.
  5. Steel and Wood buildings are expensive to construct and difficult to move.
  6. Steel buildings have limited configuration options.
  7. Steel and wood buildings require significant energy to heat and cool.
  8. Steel and wood buildings must be artificially lit during the day.
  9. Fabric buildings can be constructed to nearly any dimension, roof pitch and peak height.
  10. They can be uniquely shaped to fit creative designs and odd sized lots.
  11. Can include offset peaks, varying column heights, sidewall dormers and mono-slope roofs.
  12. Straight side walls allow you to utilize every available square foot.
  13. They are energy efficient.
  14. Fabric roofs offer up to 12% translucency, which allows natural light to permeate the structure.
  15. Eliminates the need for artificial lighting during the day, significantly reducing energy costs.
  16. When translucent fabrics are used to introduce daylight, they provide an environmental connection between indoor and outdoor spaces.
  17. Skylights and solar panels can be incorporated in the design of fabric buildings.
  18. Fabric buildings are rust and corrosion resistant especially to: salt, fertilizer, sludge, compost and other materials/processes that are harmful to steel.
  19. Fabric buildings perform much better than wood buildings in a fire.

Let’s get started.

Contact a Calhoun representative today.
We will connect you with one of our North American dealers or worldwide partners.

Contact us today   Request a quote