GETSUP buyer guide · Last reviewed September 18, 2026
“Single truss” and “double truss” describe part of a fabric shelter’s frame configuration, but they do not provide a complete structural rating. Buyers still need the exact model drawings, spacing, bracing, connections, cover, anchors and site-specific requirements.
Use the truss label as a shortlist filter, then compare verified documentation for the complete shelter.
Quick answer
Single-truss models often serve smaller spans and storage needs, while double-truss models are commonly offered for larger shelters and more demanding applications. The correct choice depends on the exact model, size, arch spacing, site exposure, foundation, anchoring, use and approved engineering—not the truss label alone.
What the terms describe
A single-truss shelter uses one primary truss/arch assembly at each frame line. A double-truss shelter uses a paired or built-up frame arrangement according to that manufacturer’s design. Connection plates, bracing, purlins, steel sections and spacing vary between models.
Because manufacturers use different geometries and materials, two shelters carrying the same label are not necessarily equivalent.
Practical comparison
| Factor | Single-truss screening questions | Double-truss screening questions |
|---|---|---|
| Span and length | Is the candidate model offered at the required clear dimensions? | Does the larger assembly create the needed span and layout? |
| Frame spacing | What is the exact spacing and number of frame lines? | What spacing and paired-frame detail is documented? |
| Doors | Will the opening fit without removing required bracing? | How are large doors and end frames reinforced? |
| Foundation | Which anchors and substrate does the model require? | What higher reactions or connection details must the foundation support? |
| Installation | Can the crew safely assemble and raise the arches? | What lifting equipment, temporary bracing and crew plan are required? |
| Engineering | Are model-specific documents available? | Are model- and site-specific documents available for the full configuration? |
Use and access can decide before structure
A smaller double-truss shelter is not automatically more useful than a larger single-truss model, or vice versa. Draw the stored items and vehicle paths inside the usable envelope first.
- Required clear width for equipment turning or material rows
- Door opening for trucks, loaders, farm machinery or containers
- Clear height near sidewalls, not only at the roof peak
- Need for interior work areas, aisles or future racking
- Fire access and egress requirements
- Potential future expansion and whether the system permits it
Frame spacing and cover are separate decisions
GETSUP listings include different model-specific arch spacings and cover weights. Do not combine a frame value from one listing with a cover or rating from another. Request a bill of materials or quotation that names the exact size, frame spacing, cover and door package.
A heavier cover does not compensate for an unverified frame, anchor or foundation. Likewise, a heavier-looking frame does not establish cover life or fire documentation.
Evidence-based comparison sheet
| Field | Option A | Option B |
|---|---|---|
| Exact model and size | _____ | _____ |
| Clear interior and door dimensions | _____ | _____ |
| Truss/arch and spacing | _____ | _____ |
| Steel, connections, purlins and bracing | _____ | _____ |
| Cover specification | _____ | _____ |
| Snow/wind documentation | _____ | _____ |
| Foundation and anchors | _____ | _____ |
| Engineering/permit package | _____ | _____ |
| Freight, unloading and installation | _____ | _____ |
| Maintenance and warranty | _____ | _____ |
Frequently asked questions
Is double truss always stronger than single truss?
The label alone is not a capacity statement. Compare model-specific geometry, materials, spacing, connections, bracing, anchors, foundation and documented loads.
When is a single-truss shelter appropriate?
It can suit a smaller span or moderate storage application when the exact model, site, foundation and documented requirements are appropriate.
When should I consider double truss?
Consider it when larger spans, building sizes or the manufacturer’s documented application point to a paired/heavier frame system, subject to site and engineering review.
Does closer arch spacing guarantee a higher snow rating?
No. Spacing is only one part of the system. Use the exact documented rating/design information for the complete model and installation.
Can I upgrade only the cover to make a shelter stronger?
A cover change does not upgrade the verified structural capacity of the frame, connections, anchors or foundation. Any configuration change needs manufacturer/engineering confirmation.
Which configuration is easier to install?
It depends on size, component weight, assembly sequence, site and available lifting equipment. Large double-truss systems usually require a more developed installation plan.
Can the same foundation be used for either type?
Not automatically. Reactions and connection details differ. The foundation and anchors must match the exact approved shelter configuration and site.
Related GETSUP resources
Get a model-specific recommendation
Send GETSUP your load, pallet or platform dimensions, aisle or site measurements, operating environment, delivery postal code and target date. Our team can narrow the current options and flag information that still needs to be confirmed before an order.
Contact GETSUP · 905-569-8898 · info@getsupinc.com · Local pickup at 2585 Dunwin Drive, Mississauga, Ontario.